160720 aec extension city 1 4 nov 2016 of bristol college · - mass of test weight: 4 kg. •...

MSurface finishes

160720 AEC extension City of Bristol College

1 4 Nov 2016

M10A Initial Costing

M10

Cement based levelling/ wearing screeds

No.

Section Revision History

Purpose

A Initial Costing 4th Nov 2016

Clauses amended in Revision A

This is the first revision stamp for this section. For all future revision stamps, details of all clauses amended at that revision will be included here.


2 4 Nov 2016

M10 Cement based levelling/ wearing screeds

To be read with Preliminaries/General conditions.

TYPES OF SCREED

115 CEMENT:SAND LEVELLING SCREEDS TO UPPER FLOORS• Substrate: Precast concrete planks. • Screed construction: Partially bonded, as clause 270.

- Reinforcement for crack control: Only at perimeter when sitting on steelwork. Reinforcement to be Fibremesh.

• Thickness . - Nominal: 65 mm. - Minimum: 65 mm.

• Mix: - Proportions (cement:sand): To BS 8204-1.

• In situ crushing resistance (ISCR) category: B . - Mass of test weight: 4 kg.

• Flatness/ Surface regularity: Maximum permissible deviation: SR2. • Finish: Trowelled, as clause 540.

- To receive: Carpet tiles and sheet flooring. • Other requirements: None.

115C CEMENT:SAND LEVELLING SCREEDS TO UPPER FLOORS• Substrate: Precast concrete hollow core planks. • Screed construction: Partially bonded, as clause 270.

- Reinforcement for crack control: Steel fabric, as clause 392. • Thickness .

- Nominal: 75 mm. - Minimum: 65 mm.

• Mix: - Proportions (cement:sand): To BS 8204-1.

• In situ crushing resistance (ISCR) category: A (3 mm maximum indentation). - Mass of test weight: 4 kg.

• Flatness/ Surface regularity: Maximum permissible deviation: SR2. • Finish: Trowelled, as clause 540.

- To receive: Carpet tiles and sheet flooring. • Other requirements: Allow for Movement joints.



3 4 Nov 2016


130 PROPRIETARY QUICK DRYING LEVELLING SCREEDS T0 Roof top plant area • Substrate: Precast concrete planks. • Screed manufacturer: Contractor's choice.

- Product reference: Submit proposals. • Screed construction: Fully bonded, as clause 260.

- Reinforcement for crack control: Steel fabric, as clause 392. • Thickness:

- Nominal: 70 mm. - Minimum: 65 mm.

• Mix: - Cement: As clause 302.. - Proportions: To manufacturer's recommendations.

• In situ crushing resistance (ISCR) category: B (4 mm maximum indentation). - Mass of test weight: 4 kg.

• Flatness/ Surface regularity: Maximum permissible deviation: SR3. • Finish: Smooth floated, as clause 530.

- To receive: roof insulation. • Other requirements: Movement joints .

GENERALLY/PREPARATION

205 DESIGN LIFE OF SCREEDS• Duration: 50 years .

- Subject to reasonable wear and tear. • Location: all floors . • Condition of use: Subject to correct loading and traffic usage throughout duration.

210 SUITABILITY OF SUBSTRATES• General:

- Suitable for specified levels and flatness/ regularity of finished surfaces. Consider permissible minimum and maximum thicknesses of screeds.

- Sound and free from significant cracks and gaps. • Concrete strength: To BS 8204-1, Table 2. • Cleanliness: Remove plaster, debris and dirt. • Moisture content: To suit screed type. New concrete slabs to receive fully or

partially bonded construction must be dried out by exposure to the air for minimum six weeks.

215 SURFACE HARDNESS OF SUBSTRATES TO RECEIVE POLYMER MODIFIED WEARING SCREEDS

• General: Substrates must restrain stresses that occur during setting and hardening of wearing screeds.

• Test for surface hardness: To BS EN 12504-2 using a rebound hammer with compliance values selected from the following: Screed thickness Rebound hammer value _______________________________________________ 15 mm or less Greater than 25 Greater than 15 mm Greater than 30 _______________________________________________

• Report: Submit details of areas where substrates surface hardness does not comply with these values.


4 4 Nov 2016


220 PROPRIETARY LEVELLING/WEARING SCREEDS• General: Materials, mix proportions, mixing methods, minimum/maximum

thicknesses and workmanship must be in accordance with recommendations of screed manufacturer.

• Standard: To BS 8204-3.

230 CONTROL SAMPLES• General: Complete areas of finished work and obtain approval of appearance

before proceeding. • Screed type: As clause ???.

- Location/ Size: ground floor, first floor.

250 CONDUITS UNDER FLOATING SCREEDS• Haunching: Before laying insulation for floating screeds, haunch up in 1:4

cement:sand on both sides of conduits.

251 CONDUITS CAST INTO OR UNDER SCREEDS• Reinforcement: Overlay with reinforcement selected from:

- 500 mm wide strip of steel fabric to BS 4483, reference D49, or - Welded mesh manufactured in rolls from mild steel wire minimum 1.5 mm

diameter to BS 1052, mesh size 50 x 50 mm. • Placing reinforcement: Mid depth between top of conduit and the screed surface.

- Screed cover over conduit (minimum): 25 mm.

255 PIPE DUCTS/ TRUNKING• Preformed access ducts: Before laying screed, fix securely to substrates and level

accurately in relation to finished floor surface.

260 FULLY BONDED CONSTRUCTION• Preparation: Generally in accordance with BS 8204-1. • Removing mortar matrix: Shortly before laying screed, expose coarse aggregate

over entire area of hardened substrate. • Texture of surface: Suitable to accept screed and achieve a full bond over

complete area. • Bonding coat: Manufacturer's standard.

270 PARTIALLY BONDED CONSTRUCTION• Preparation: Generally in accordance with BS 8204-1. • Substrate surface: Brushed finish with no surface laitance.

- Texture of surface: Suitable to accept screed and achieve a bond over complete area.

• Bonding coat: As recommended by the screed manufacturer.

275 CEMENT SLURRY BONDING• Slurry type: Neat cement. • Application: Shortly before laying screed, thoroughly wash clean the surface and

keep well wetted for several hours. Remove free water then brush in cement slurry bonding coat of creamy consistency.

• Screeding: While slurry is still wet.


5 4 Nov 2016


290A FLOATING CONSTRUCTION TO GROUND FLOOR• Insulation:

- Type: 65 mm Celotex GA3000 insulation boards to BS EN 13165 . - Installation: Lay with tight butt joints. Continue up at perimeter abutments for full

depth of screed, 25mm width. • Separating layer:

- Type: Polyethylene sheet minimum 125 micrometres thick (500 gauge).. - Installation: Lay over insulation and turn up at perimeter abutments. Lap 100 mm

at joints.

295 FLOATING CONSTRUCTION (THIN SHEET IMPACT SOUND INSULATION)• Substrate: Remove projections that may puncture the insulation. • Insulation:

- Type: 10 mm extruded (closed cell) polyethylene foam, density 30-45 kg/m³. - Installation: Lay on substrate. Turn up for full depth of screed at perimeter

abutments. Lap 100 mm at joints and seal with tape. - Perimeter: Maintain isolation of screed.

BATCHING/MIXING

302 CEMENTS• Cement types: In accordance with BS 8204-1, clause 5.1.3.

305 AGGREGATES• Sand: To BS EN 13139.

- Grading limits: In accordance with BS 8204-1, Table B.1. • Coarse aggregates for fine concrete levelling screeds:

- Standard: To BS EN 12620. - Designation: 4/10.

• Lightweight aggregates: To BS 8204-1, Annex A.

307 ADMIXTURES• Standard: In accordance with BS 8204-1, Table 1. • Calcium chloride: Do not use in admixtures.

310 BATCHING WITH DENSE AGGREGATES• Mix proportions: Specified by weight. • Batching: Select from:

- Batch by weight. - Batch by volume: Permitted on the basis of previously established weight:volume

relationships of the particular materials. Use accurate gauge boxes. Allow for bulking of damp sand.

311 BATCHING WITH LIGHTWEIGHT AGGREGATES• Standard: To BS 8204-1, Annex A. • Mix proportions: Specified by volume. • Batching: Use accurate gauge boxes.


6 4 Nov 2016


330 MIXING• Water content: Minimum necessary to achieve full compaction, low enough to

prevent excessive water being brought to surface during compaction. • Mixing: Mix materials thoroughly to uniform consistency. Mixes other than no-fines

must be mixed in a suitable forced action mechanical mixer. Do not use a free fall drum type mixer.

• Consistency: Use while sufficiently plastic for full compaction. • Ready-mixed retarded screed mortar: Use within working time and site

temperatures recommended by manufacturer. Do not retemper.

335 IN SITU CRUSHING RESISTANCE (ISCR)• Standards and category: To BS 8204-1, table 4.

- Testing of bonded and unbonded screeds: To Annex D. - Testing of floating levelling screeds: To Annex E.

340 ADVERSE WEATHER• Screeds surface temperature: Maintain above 5°C for a minimum of four days after

laying. • Hot weather: Prevent premature setting or drying out.

LAYING

345 LEVEL OF SCREED SURFACES• Permissible deviation: (allowing for thickness of coverings) ±5 mm from datum.

355 FLATNESS/ SURFACE REGULARITY OF FLOOR SCREEDS• Standard: To BS 8204-1, Table 5. • Test: To BS 8204-1, Annex C. • Sudden irregularities: Not permitted.

365 FLATNESS/SURFACE REGULARITY OF ROOF SCREEDS• Sudden irregularities: Not permitted. • Deviation of surface: Measure from underside of a 2 m straightedge (between

points of contact), placed anywhere on surface. - Permissible deviation (maximum): 6 mm.

375 COMPACTION OF SCREEDS• General: Compact thoroughly over entire area. • Screeds over 50 mm thick: Lay in two layers of approximately equal thickness.

Roughen surface of compacted lower layer then immediately lay upper layer.

382 STAIR SCREEDS• Construction: Fully bonded to treads, risers and landings. • Risers: Form using fine finish formwork. • Wearing screed surfaces: Make good with compatible cement:sand mix. Wood

float. When hardened remove laitance.

392 GENERAL REINFORCEMENT• Steel fabric: To BS 4483.

- Type: A98Reinforcement to screeds to be Fibremesh. • Installation: In accordance with BS 8204-1.


7 4 Nov 2016


395 STRIP REINFORCEMENT• Location: Across day joints . • Steel fabric: To BS 4483.

- Type A98 . - Width of strips: 500 mm .

• Installation: In accordance with BS 8204-1.

405 JOINTS IN LEVELLING SCREEDS GENERALLY• Laying screeds: Lay continuously using 'wet screeds' between strips or bays.

Minimize defined joints. • Daywork joints: Form with vertical edge.

406 BAY JOINTS IN LEVELLING SCREEDS• Screed type: As clause ???. • Bay sizes:

- Area (maximum): 20 m². • Length (maximum): 6 m. • Location of bay joints: Coordinate with those required for substrate slab and floor

covering.

415 BAY JOINTS IN BONDED WEARING SCREEDS• Bay sizes:

- Area (maximum): 20 m². - Length: Breadth ratio (maximum): 3:2.

• Location of bay joints: Over construction/ movement joints in substrate slab.

428 HEATED SCREEDS• Substrate slab: Irregularities not permitted. • Screed bays, movement joints and other joints: Coordinate with heating circuits. • Heating elements: Secure properly. Prevent displacement. • Screed laying: Compact thoroughly around heating elements. Do not damage

them.

440 CRACK INDUCING GROOVES IN LEVELLING SCREEDS• Groove depth: At least half the depth of screed. • Cutting grooves: Straight, vertical and accurately positioned. Select from the

following: - Trowel cut as screed is laid. - Saw cut sufficiently early after laying to prevent random cracking.

460 STRIP MOVEMENT JOINTS FOR DOOR THRESHOLDS• Manufacturer: Contractor's choice.

- Product reference: Contractor's choice. - Size: 5 mm.

• Installation: Set securely into screed to exact finished level of floor. Extend joints through to substrate. - Secure fixing to substrate: To manufacturer's recommendation.


8 4 Nov 2016

468 SEALANT MOVEMENT JOINTS WITH METAL EDGINGS FOR SCREED TYPE M10/???• Edging material: Stainless steel angle.

- Size: 50 x 50 x 5 mm. - Bedding: 1:3 cement:sand.

• Installation: Centre over joints in substrate. Set to exact finished level of floor. - Secure fixing to substrate: Stainless steel screws at 600 mm centres.

• Joint width: Manufacturer's standard. • Sealant:

- Manufacturer: Contractor's choice. - Product reference: Contractor's choice. - Colour: Manufacturer's standard colour range. - Preparation and application: As section Z22.

FINISHING/CURING

510 FINISHING GENERALLY• Timing: Carry out all finishing operations at optimum times in relation to setting and

hardening of screed material. • Prohibited treatments to screed surfaces:

- Wetting to assist surface working. - Sprinkling cement.

530 SMOOTH FLOATED FINISH• Finish: Even texture with no ridges or steps.

540 TROWELLED FINISH TO LEVELLING SCREEDS• Floating: To an even texture with no ridges or steps. • Trowelling: To a uniform, smooth but not polished surface, free from trowel marks

and other blemishes, and suitable to receive specified flooring material.

650 CURING• General: Prevent premature drying. Immediately after laying, protect surface from

wind, draughts and strong sunlight. As soon as screed has set sufficiently, closely cover with polyethylene sheeting.

• Curing period (minimum): Keep polyethylene sheeting in position for: period recommended by screed manufacturer.

• Drying after curing: Allow screeds to dry gradually. Do not subject screeds to artificial drying conditions that will cause cracking or other shrinkage related problems.

670 ROOF SCREEDS• Protection: Cover screeds during wet weather. When weathertight coverings are

laid, screeds must be as dry as practicable.



9 4 Nov 2016


M21

Insulation with rendered finish

No.


Purpose





10 4 Nov 2016

M21 Insulation with rendered finish


GENERAL/ SYSTEM REQUIREMENTS

180 STRUCTURAL SUBSTRATE• Description: Metsec type Galvanised cold formed framing. • Preparation: None required.



11 4 Nov 2016


215 EXTERNAL WALL INSULATION SYSTEM• Alsecco Insulated render system

- Type: Basic - Alsecco External Wall Insulation System – adhesive and mechanical fix. Must be

applied in strict accordance with the manufacturer's written recommendations by a contracting partner from Alsecco UK Ltd's current list

- Substrate: Metsec and suitable board - System materials & components: In all cases, substrate should be deemed fit for

purpose prior to the application of Alsecco External Wall Insulation • System Components

- Sub Primer: Sub Primer HT/P if required - Adhesive: Armatop MP - Insulation Type: Expanded polystyrene (15kg/m³) - Thickness: 100mm - 'U'-Value: 0.21W/m²K - Basecoat: Armatop MP (4-5mm) reinforcing Mesh 32 - Top Primer: Top Primer SC - Topcoat: Silitect - Paint Finish: Not required - Deco Profiles: No - Brick Slip/Flex: No - Ashlar Detail Mesh: No

• Accessories: - Base rail: A 105 - Stop beads: W105 - Corner beads: 3707 Concealed PVC with Mesh - Mechanical fixings: Alsecco SBH-T 120 (subject to change after survey) - Dammflex: Yes - Sealing Strip 13/2: Yes - PU Foam: Yes - PU flex: Yes - Disbon Primer: No - Balcony Primer: No - Balcony Drip Bead: No - Expansion Joints: required only where present in substrate - Alsecco Cill: No

• System Material and Component Description: Aluminium horizontal base rail 2m long. (For Reference, see Section 1.2.) Base rails shall be fixed to substrates with zinc coated carbon steel hammer-drive fixings (minimum 6mm diameter, shank 60 - 80mm long) and to wooden substrates with pan-head or washer-head stainless steel wood screws (minimum 32mm long). Spacing of fixings to be maximum 300mm centres. Contractor to ensure that system complies with CP3: Chapter V: Part 2: 1972 in relation to its structural stability.

• Insulation Board: - Expanded Polystyrene (EPS) Board. Nominal Density 15klg/m³. To BS 3837 Part 1:2004. - Thermal Conductivity: 0.037W/mK; - EPS Board shall be aged, prior to cutting, by air drying for 6 weeks or equivalent kiln drying. - Maximum size of EPS boards shall not exceed 1200 x 600mm. - EPS Boards shall exhibit minimum 80% bead fusion and physical properties


12 4 Nov 2016


according to BS 3837 Part 1 2004 • Fire Barriers: To comply with the recommendations of the BRE, horizontal Fire Barriers

require to be placed at every floor level above 2 stories. (Ground, first and Second

Floor do not require these barriers). These barriers comprise of 1000 x 200mm Rock

fibre Lamella Panels, applied in a continuous strip around the building. All fire

barriers must be double meshed with an overlap of 200mm above and below the

barrier (where applicable.)

• Beading: Provide beads and stops at all external angles and stop ends except where detailed otherwise.

• Reinforcing Coat: As stated - mixed with water only • Reinforcement: As Stated - mixed with clean water only • Topcoat Primer: As stated • Topcoat: Alsecco through coloured Topcoat • Execution: All installation of Alsecco materials in the UK shall be performed by

Alsecco - Contracting Partners. Under no circumstances shall any of the Alsecco products be altered with any additives, except for small amounts of clean water as direction the label. - If required, apply Sub primer to substrate. All substrates must be free of loose

particles, dust, grease and oils, or any adhesion reducing substance. If required a fungicidal wash must be applied. All exposed metal work that is to be covered by Alsecco EWI Systems to be coated with an appropriate primer, eg. Disbon or similar and left to dry prior to EWI application.

- If substrate is of poor alignment and levelling is required, use Alsecco TZ1 basecoat (without reinforcing mesh). Not suitable for lightweight or AAC Blockwork.

- Align base rail and fix with Alsecco anchors spaced at a maximum of 500mm apart

- ensure that the base rail is not distorted. Insert base rail connectors at all rail joints. Corners should be made with mitred cuts, or an Alsecco pre-formed corner section. Level and line can be adjusted using Alsecco spacers available in a range of sizes.

- Mix Alsecco adhesive mortar and apply to back of insulation board using spot and continuous dab method. the adhesive mortar must cover at least 50% of the board / substrate unless detailed otherwise. (Typically dab and 3no. Spots per board). On flat and even substrate, the tooth bed method of application can be used. 100% of board / substrate must be covered when using the tooth bed method of application with insulation board. on substrates where mechanical fixings are not required, the tooth bed method must be used.

- The Lamella Mineral Wool Fire Barriers are fixed at the desired position and are applied with 100% adhesive mortar. This is then fixed with stainless steel mechanical fixings at a maximum of 400mm centres. The reinforced basecoat must have additional reinforced mesh applied, above and below the Firebreak barrier,


13 4 Nov 2016


overlapping by 200mm.Ensure that all insulation board edges are clean and free of adhesive mortar. All joints must be staggered, min 200mm (see Fixing Layout Detail); additional cutting may be required around doors and windows to ensure that board joints do not correspond with corners of openings. Fit the insulation boards tightly and bed well. Any open joints between insulation boards up to a max width of 10mm must be closed with a strip of insulation board or PU foam - NOT adhesive mortar or render.

- Allow approx. 12 to 72 hours drying time for Alsecco adhesive mortar, depending on type of adhesive mortar and weather conditions. Subsequent rendering, mechanical anchoring or finishing work on insulation boards must not be carried out until adhesive mortar has set and not before 24hrs.

- Mechanical fixings (if required) as specified in Section 1.2 are specified according to board thickness and substrate. Anchors should be fixed in accordance with the manufacturer's instructions and Alsecco fixing requirements. (See Fixing Layout Detail)

- Rasping of the EPS Board surface must be carried out over the whole surface to achieve a smooth, even finish, prior to application of a reinforcing coat. For curved wall applications, rasping must achieve a smoothly curved surface with no visible faceting or unevenness.

- Install Propriety Alsecco Sealant in conjunction with detail drawings. - Corner bead and any additional beading as specified in Section 1.2 to be

secured to insulation boards with Alsecco Basecoat render at corners and align until plumb.

- All beads should be cut neatly, mitres formed at return angles and sharp edges, swarf and other potentially dangerous projections removed. Fix securely, using the longest possible lengths, plumb, square and true to line and level, ensuring full contact of wings with background. After coatings have been applied, remove coating material while still wet from surfaces of beads/stops, which are to be exposed to view.

- Apply Alsecco Basecoat render (as specified) to the fixed insulation boards using a stainless steel trowel. Level out using plasterer's straight edge or by combing through with a 10 x 10 tooth trowel. Float specified reinforcing mesh into the top of the basecoat render, ensuring a minimum horizontal and vertical overlap of 100mm for the glass mesh. All corners at openings must be additionally reinforced with 250 x 250mm mesh strips embedded diagonally into the wet basecoat render. Immediately trowel the mesh into the basecoat while still wet and smooth off to finished thickness using a stainless steel trowel. for optimum strength, the mesh must sit in the top one third of the basecoat. Leave basecoat render to set for at least 2 to 3 days before applying Alsecco topcoat renders. Adjoining area of EPS insulation and extruded insulation must have an additional strip of reinforcing mesh applied within the basecoat with a minimum 200mm overlap.

- Apply allocated Alsecco topcoat primer to dry basecoat render using a short pile roller, prior to applying stated Alsecco topcoat. Drying time 2 - hours (weather dependent)


14 4 Nov 2016


- Prior to the application of topcoat, all scaffolding boards should be cleaned to ensure minimum dirt being transferred onto the finished topcoat. The topcoat is a finishing trade, work sequencing should ensure that no or very minimum work is carried out onto the render after application of topcoat. Where Scaffold plugs are to be retained, appropriate Scaffold Ties to be used in accordance with system details.

- Apply specified topcoat render using a stainless steel trowel and immediately create the desired effect using a plastic finishing trowel. Drying time of topcoat render is approximately 1 to 2 days (weather dependent)

- The topcoat render, is applied in accordance with the following general rules: -a. using a clean, rust free low speed mixer, throughly stir the Alsecco finish to a uniform consistency.

- b. Finish shall be applied in a continuous application always working to a wet edge. Care should be taken to avoid texture changes at different levels. to prevent staining of the finish coating, always ensure that the scaffold boards are free from dust before commencing application of the final coat. If possible, entire sections or elevations should be achieved by working to natural breaks in the building or changes in colour or texture. Where day joints are unavoidable these should be made to coincided with natural features such as a line of window cills. Apply a masking tape at the desired position of the joint and apply the finish overlapping the edge of the tape. Carefully remove the tape while the finish is still wet to leave a fair edge. Once the finish material has set subsequent applications may be applied by masking the previously completed section with tape and carefully applying the new finish to achieve a barely visible joint. -c. Only in situations where mineral renders (Miratect & Alsilite) are to be used, irregular shading and patching due to uneven drying cannot always be avoided. Evenness or colour can be achieved by applying Alsecco Equalising finish. -d. Weather conditions will be a factor in the application of the finish as well as the drying time. -e An option for areas of high salt-water attack, a final coat of Alsecco Alsicolor Quattro can be applied.

- If Ashlar formers are required, the insulation is to be routed out with the Alsecco routing tool. With the Ashlar now formed, a thin coat 1-2mm of Armatop MP basecoat should be applied into Ashlar groove, with care being taken to cover all internal angles. A layer of Alsecco Ashlar pre-formed Detail Mesh should be inserted into the Armatop MP, using an Alsecco Detail Trowel, which will ensure a sharp contour of the Ashlar effect being maintained. The mesh should be extended 100-200mm onto the front surface of the basecoat and feathered in. Basecoat to be finished with 2No. Coats of ALSECCO Quatro Finish

- Incorporate vertical expansion joints in the brickwork and tile coursing by introducing a flexible joint compound in place of the pointing or grouting mortar. Vertical joints to brickwork should follow the brink bond line. Joints should correspond with window or door opening or approx. every 3m vertically for dark coloured finishes or 6m vertically for light coloured finishes. In accordance with BS5628 : part 3 2001 Use of masonry. Please note that brick slip packers may be required on certain areas to support the slip until mortar has set.

- Although it is preferable when working with highly pigmented renders to mask or


15 4 Nov 2016


Use a trowel to apply the Bonding Mortar AF to the basecoat and a notched trowel (4 x 6 or 5 x 5mm) to comb through the adhesive in a horizontal direction to create a ridged bed. Place the brick slip flex on top of the open adhesive, leaving a joint width in between and press into position. Use a damp brush to smooth the adhesive over in the area of the joint before the adhesive has set. Ensure a close connection between the adhesive compound and the brick slip flex Only apply as much adhesive as can be covered with brick slip flex before a skin is formed.

- Remove efflorescence, dust and other loose material by thoroughly dry brushing. After the basecoat has had a minimum 24 hours drying time, apply an additional Intermediate Mortar Coat layer, 2mm thick. (Intermediate Mortar Coat consists of Spardash DLX. Colour to match Basecoat.) This is used to form the Mortar Joint. Immediately apply, wet on wet, a 2-3mm thick layer of decorative render brick topcoat. (Consisting of Spardash DLX - Colour as requested.) Give these layers 8-16 hours drying time. Using a straight edge with a joint cutting tool, scrape out the brick profiles, cutting through the topcoat & intermediate coat, back to the hard basecoat to form the mortar joint. NOTE: If top layer of render brick is of dark colouring, lime bloom will occur. To prevent this, a wash of Alsecco Hydrophobic MI agent must be applied once all coats are dry. (Technical Data Sheet available upon request.)

• Protection and Cleaning - All installation of Alsecco materials in the UK shall be performed by Alsecco

Contracting Partners. Under no circumstances shall any of the Alsecco products be altered with any additives, except for small amounts of clean water as directed on the label.

- All plasters described should never be applied if ambient and surface temperatures cannot be kept above +3°C for mineral products, +5°C for acrylic and silicon products and +1°C for ice products during application and drying period. Prior to installation, the wall shall be free of residual moisture. The stored material should be protected from frost and strong sunlight.

- Although it is preferable when working with highly pigmented renders to mask or protect other building elements such as windows, sills, etc., spilled or dropped materials may be removed easily from most surfaces with a wet sponge or cloth before the material has dried out. Renders which have been allowed to partially dry may be removed by using a soap solution to soften the render and warm water to clean the surface. Absorbent surfaces such as concrete, brick, etc. maybe affected by the pigments of the render and where spillage is likely then these surfaces should be protected with appropriate covering material.


16 4 Nov 2016


• General Comments - Remove efflorescence, dust and other loose material by thoroughly dry brushing.

Remove all traces of paint, grease, dirt and other materials incompatible with coating by scrubbing with water containing detergent and washing off with plenty of clean water. Allow to dry before applying coatings unless specified otherwise.

- Prepare backgrounds as specified for the type of coating to be applied. Methods other than those specified may be submitted for approval.

• Treatment of Organic growths: Biocides must be approved and registered by the Health and Safety Executive (HSE) and listed in the current 'Reference Book 500', as surface biocides.

• Application generally: operation between angles and joints. All coatings to be not less than the thickness specified firmly bonded, of even and consistent appearance, free from rippling, hollows and ridges. Finish surfaces to a true plane, to correct line and level, with all angles and corners to a right angle unless specified otherwise, and with walls and reveals plumb and square. Prevent excessively rapid or localised drying out. The standard of finish shall meet the requirements of BSEN 13914-1: 2005 NA.15 assessment of external rendered finishes Alsecco would recommend where possible that the variation in gap under a 1.8m straight edge (with feet) placed anywhere on the surface to be not more than 3mm. - Work in the shade and out of drying winds whenever possible.

Allow each coat to dry out thoroughly to ensure that drying shrinkage is substantially complete before applying next coat.

- Adequately protect newly applied external coatings against frost and rain for the first 48 hours using polyethylene sheet / Debris netting hung clear of the face, or other approved method.

225 ACCESSORIES TO ALSECCO RENDER PPC AUMINIUM PARAPET FLASHING To front Rendered panel Manufacturer: Alumasc Exterior Building Products Ltd, White House Works, Bold Road, Sutton, St Helens, Merseyside WA9 4JG. Tel: 01744 648400, Fax: 01744 648401. Email: [email protected]; Web: www.alumasc-exteriors.co.uk OR SIMILAR APPROVED. - System reference: [Skyline copings].

Insulation [INSULATED AS DETAIL DRAWINGS 160720 Dimensions: Width 950mm, outer drip110mm inner drip110mm Gauge: 3 mm Profile: fall in to roof - drips min 30mm from STO render face aerofoil front profile Render: Alsecco as Cl 215. Decorative finish: PPC to BS:6496 Aluminium RAL colour TBC Other Requirements: Allow for butt movement joints Installed via a fixing strap profile with integral EPDM seal Fixing to have no penetration of the coping Fixings are not to be visible on the surface of the coping.


17 4 Nov 2016

225A ACCESSORIES TO ALSECCO RENDER PANELS STAGE TRUSSES

Manufacturer: Nobleox International Ltd Telephone ++ 00(44) 1622 715703 Mobile ++ 00(44) 7766 056026 Fascimile ++ 00(44) 1622 715554 E-mail: [email protected] System reference: Truss Systems - HD43 / FD43 Triangle Truss Aluminium Stage trusses as shown on the elevations 110346/A/300 Fixed through render panels top and to pad foundation . PPC aluminium 3mm enclosure panels fixed to bottom 2.5 m as anti climb device.

560 WARRANTY

All work to be covered by the Alsecco



18 4 Nov 2016


M40

Stone/ concrete/ quarry/ ceramic tiling/ mosaic

No.


Purpose





19 4 Nov 2016

M40 Stone/ concrete/ quarry/ ceramic tiling/ mosaic

To be read with Preliminaries/ General conditions.

TYPES OF TILING/ MOSAIC

110B TILING TO WALLS ref W1• Tiles: Splashbacks to sinks and handriers.

- Manufacturer/ Supplier: Johnson. Product reference: Prismatics.

- Colour: tbc. - Finish: Glazed. - Size: 100 x 100 mm. - Thickness: 6mm. - Slip potential:

Slip resistance value (SRV) (minimum)/ Pendulum test value (PVT) (minimum) to BS 7932 or BS EN 14231 (natural stone only): Not applicable. Surface roughness (Rz) (minimum) to BS 1134: Not applicable.

- Recycled content: Not applicable. • Background/ Base: Partitions - FF Block & Plasterboard.

- Preparation: bonding agent . • Intermediate substrate: Not required. • Bedding: Thin bed adhesive - solid, as clause ???.

- Reinforcement: Not applicable. - Adhesive: Contractor's choice.Breeam compatible.

• Joint width: 2 mm. • Grout: white waterproof proprietary grout.

- Type/ classification: CG2. • Movement joints: 6mm mastic joints at all perimeters and at intermediate points in

accordance with manufacurers recommendations.. • Accessories: None.

GENERAL

210 SUITABILITY OF BACKGROUNDS/ BASES• Background/ base tolerances: To permit specified flatness/ regularity of finished

surfaces given the permissible minimum and maximum thickness of bedding. • New background drying times (minimum):

- Concrete walls: 6 weeks. - Brick/ block walls: 6 weeks. - Rendering: 2 weeks. - Gypsum plaster: 4 weeks.

• New base drying times (minimum): - Concrete slabs: 6 weeks. - Cement:sand screeds: 3 weeks.

250 SAMPLES• General: Submit representative samples of the following:

Each type of tile.



20 4 Nov 2016


260 CONTROL SAMPLES• General: Complete sample areas, being part of finished work, in locations as

follows: typical toilet.

PREPARATION

390 PLASTERBOARD BACKGROUNDS• Boards: Dry, securely fixed and rigid with no protruding fixings and face to receive

decorative finish exposed.

400 BACKGROUNDS GENERALLY• Boards: Dry, securely fixed and rigid with no protruding fixings. • Surfaces to be tiled: Seal or prime if recommended by adhesive manufacturer.

460 SMOOTHING UNDERLAYMENT• Type: Recommended by adhesive manufacturer. • Condition: Allow to dry before tiling.

FIXING

510 FIXING GENERALLY• Colour/shade: Unintended variations within tiles for use in each area/room are not

permitted. - Variegated tiles: Mix thoroughly.

• Adhesive: Compatible with background/base. Prime if recommended by adhesive manufacturer.

• Cut tiles: Neat and accurate. • Fixing: Provide adhesion over entire background/base and tile backs. • Final appearance: Before bedding material sets, make adjustments necessary to

give true, regular appearance to tiles and joints when viewed under final lighting conditions.

• Surplus bedding material: Clean from joints and face of tiles without disturbing tiles.

530 SETTING OUT• Joints: True to line, continuous and without steps.

- Joints on walls: Horizontal, vertical and aligned round corners. - Joints in floors: Parallel to the main axis of the space or specified features.

• Cut tiles: Minimize number, maximize size and locate unobtrusively. • Joints in adjoining floors and walls: Align. • Joints in adjoining floors and skirtings: Align. • Movement joints: Where locations are not indicated, submit proposals. • Setting out of Floor tiles : Drawing references: n/a. • Setting out of Wall Tiles : Submit proposals.

550 FLATNESS/ REGULARITY OF TILING• Sudden irregularities: Not permitted. • Deviation of surface: Measure from underside of a 2 m straightedge placed

anywhere on surface. The straightedge should not be obstructed by the tiles and no gap should be greater than 3 mm.


21 4 Nov 2016

560A LEVEL OF TILING ACROSS JOINTS• Deviation (maximum) between tile surfaces either side of any type of joint:

- 1 mm for joints .

651 THIN BED ADHESIVE - SOLID (WALLS)• Application: Apply floated coat of adhesive to dry background in areas of about 1

m². Comb surface. • Tiling: Apply thin even coat of adhesive to backs of dry tiles. Press tiles firmly onto

float coat. • Finished adhesive thickness (maximum): 3 mm.

710 THICK BED ADHESIVE - SOLID (FLOORS)• Application: Apply floated coat of adhesive to dry base and comb surface. • Tiling: Apply coat of adhesive to backs of tiles filling depressions or keys. Press tiles

firmly into position. • Finished adhesive thickness: Within range recommended by manufacturer.

MOVEMENT JOINTS/ GROUTING/ COMPLETION

805 SEALANT MOVEMENT JOINTS WITH METAL EDGINGS IN TILING TO FLOORS• Edging material: Stainless steel angle .

- Size: to suit 10mm joint and tile thickness . - Bedding: Bed in 1:3 cement:sand.

• Installation: Centre over joints in base. Set to exact finished level of floor. - Fixing to base: Brass screws and plugs at 600 mm centres. .

• Joint width: 10mm . • Sealant: see Z22 .

- Colour: Black . - Preparation and application: As section Z22.

815 SEALANT MOVEMENT JOINTS IN TILING TO WALLS• Joints: Extend through tiles and bedding to base/ background. Centre over joints in

base/ background. - Width: 6 mm .

• Sealant: Z22 . - Colour: white . - Preparation and application: As section Z22.

875 GROUTING• Sequence: Grout when bed/adhesive has set sufficient to prevent disturbance of

tiles. • Joints: 6 mm deep (or depth of tile if less). Free from dust and debris. • Grouting: Fill joints completely, tool to profile, clean off surface. Leave free from

blemishes. - Profile: Flush.

• Polishing: When grout is hard, polish tiling with a dry cloth.

885 COLOURED GROUT• Staining of tiles: Not permitted • Evaluating risk of staining: Apply grout to a few tiles in a small trial area. If

discoloration occurs apply a protective sealer to tiles and repeat trial.



22 4 Nov 2016


M50

Rubber/ plastics/ cork/ lino/ carpet tiling/ sheeting

No.


Purpose





23 4 Nov 2016

M50 Rubber/ plastics/ cork/ lino/ carpet tiling/ sheeting

To be read with Preliminaries/ General conditions.

TYPES OF COVERING

130B CARPET TILING• Location: Offices. • Base: Screed or Power floated concrete.

- Preparation: As clause E60/. • Fabricated underlay: none. • Carpet tiles:

- Manufacturer: CFC Carpets. Product reference: Basis Range.

- Type: Europa Loop Range. - BS EN 1307 classification:

Category: Type 1. Level of use class: Heavy contract 33. Luxury rating class: LC1.

- Recycled content: Submit proposals. - Size: 500 x 500 mm. - Colour/ pattern: Glacia Blue, Ocean Blue and Dark grey.

• Method of laying: Fully adhere all tiles with release adhesive recommended by tile manufacturer..

• Accessories: Edging strip at thresholds as clause 740. • Other requirements: Random laid..

155A PVC SHEET FLOORING WOOD EFFECT in Labs and Corridors Manufacturer: Polyflor Type: Acoustix gallery FX PUR

• Colour: Stained maple 6838 and American oak 6815. • Acoustic underlay: if requierd on first floor areas in addition to th acoustic vinyl .

155D PVC SHEET FLOORING Non Slip Vinyl Manufacturer: Forbo Flooring Systems or similar approved - Web: www.forbo-flooring.co.uk. - Email: [email protected]. - Product reference: SureStep

• Colour: Elephant / Steel. • Acoustic underlay: Not required.

BRE Global A+ Rated Product (Certificate No: ENP 336) in major use areas such as healthcare & education Fully HSE compliant - 36+ TRL Pendulum (wet test)



24 4 Nov 2016


170A CARPETING BARRIER MATTING • Location: Entrance Barrier Matting. • Base: Screed.

- Preparation: Should be clean, dry and flat. • Fabricated underlay: -. • Carpet underlay to BS 5808 and BS EN 14499::

- Manufacturer: -. Product reference: -.

- Type: -. - Class: -. - Recycled content: -

• Underlay adhesive (and primer if recommended by manufacturer): -. • Carpet:

- Manufacturer: Heckmondwike. Product reference: tbc.

- Type: Heavy Contract. - BS EN 1307 classification:

Category: -. Level of use class: -. Luxury rating class: -.

- Recycled content: -. - Width: 2.0m and 4.0 metre . - Colour/ pattern: Charcoal, Ribbing runs down length of roll.

• Carpet adhesive (and primer if recommended by manufacturer): to manufacturers recommendations.

• Accessories: -. • Other requirements: Sheet carpet should be fully adhered with F Balls F3 or

Laybond L47CV. Refer to manufacturers installation guide..

GENERAL REQUIREMENTS

210 WORKMANSHIP GENERALLY• Base condition after preparation: Rigid, dry, sound, smooth and free from grease,

dirt and other contaminants. • Finished coverings: Accurately fitted, tightly jointed, securely bonded, smooth and

free from air bubbles, rippling, adhesive marks and stains.

215 BREEAM CERTIFICATION Volatile Organic Compounds All Flooring products in the works : Provide Manufacturers/suppliers written certification/advice verifyifying that BS EN 14041:2004 Formaldehyde E11 regulated preservatives are absent and of the minimum content.

220 SAMPLES• Covering samples: Before placing orders, submit representative sample of each

type.

230 CONTROL SAMPLES• General: Complete areas of finished work in approved locations as follows, and

obtain approval of appearance before proceeding: MAIN ENTRANCE AND EACH TYPE OF ROOM .


25 4 Nov 2016


250 LAYOUT - ROLL MATERIALS• Setting out of seams: Agree setting out for sheeting types M50/ 150 / 155 .

252 LAYOUT - PATTERNS• Setting out: Agree setting out for covering types M50/ COMMON ROOM .

330 COMMENCEMENT• Required condition of works prior to laying materials:

- Building is weathertight and well dried out. - Wet trades have finished work. - Paintwork is finished and dry. - Conflicting overhead work is complete. - Floor service outlets, duct covers and other fixtures around which materials are to

be cut are fixed. • Notification: Submit not less than 48 hours before commencing laying.

340 CONDITIONING• Prior to laying: Condition materials by unpacking and separating in spaces where

they are to be laid. Maintain resilient flooring rolls in an upright position. Unroll carpet and keep flat on a supporting surface.

• Conditioning time and temperature (minimum): As recommended by manufacturer with time extended by a factor of two for materials stored or transported at a temperature of less than 10°C immediately prior to laying.

350 ENVIRONMENT• Temperature and humidity: Before, during and after laying, maintain approximately

at levels which will prevail after building is occupied. • Ventilation: Before during and after laying, maintain adequate provision.

360 FLOORS WITH UNDERFLOOR HEATING• Commencement of laying: Not before a period of 48 hours after heating has been

turned off. • Post laying start up of heating system: Slowly return heating to its operative

temperature not less than 48 hours after completing laying.

PREPARING BASES

410 NEW BASES• Suitability of bases and conditions within any area: Commencement of laying of

coverings will be taken as acceptance of suitability.

430 NEW WET LAID BASES• Base drying aids: Not used for at least four days prior to moisture content testing. • Base moisture content test: Carry out in accordance with BS 5325, Annexe A or BS

8203, Annexe A. - Locations for readings: In all corners, along edges, and at various points over

area being tested. • Commencement of laying coverings: Not until all readings show 75% relative

humidity or less.


26 4 Nov 2016


440A SUBSTRATES TO RECEIVE THIN COVERINGS• Wood floated finishes: Uniform, smooth surface free from trowel marks and other

blemishes. Abrade suitably to receive specified floor covering material.

460 SMOOTHING/ LEVELLING UNDERLAYMENT COMPOUND• Type: As recommended by covering manufacturer. • Manufacturer: Submit proposals.

- Product reference: Submit proposals.

LAYING COVERINGS

610 SETTING OUT TILES• Method: Set out from centre of area/ room, so that wherever possible:

- Tiles along opposite edges are of equal size. - Edge tiles are more than 50% of full tile width.

620 COLOUR CONSISTENCY• Finished work in any one area/ room: Free from banding or patchiness.

640A ADHESIVE FIXING GENERALLY• Adhesive type: As specified, as recommended by covering/ underlay,

manufacturer or as approved. • Primer: Type and usage as recommended by adhesive manufacturer. • Application: As necessary to achieve good bond. • Finished surface: Free from trowel ridges, high spots caused by particles on the

substrate, and other irregularities. NOTE : All adhesives for all components and fittings to comply withthe requirements of Breeam 2008 Education section Hea9 Volatile Organic Compounds All Flooring adhesives to comply with BS EN 13999-1 2007

650 SEAMS• Patterns: Matched. • Joints: Tight without gaps.

670 BORDERS/ AND FEATURE STRIPS IN SHEET MATERIAL• Curl: Not acceptable. • Corners: Mitre joints.

680 SEAM WELDING COVERINGS• Commencement: At least 24 hours after laying, or after adhesive has set. • Joints: Neat, smooth, strongly bonded, flush with finished surface.

700 LOOSE LAID CARPET TILES• Areas of adhered tiles: Secure using double sided tape or peelable adhesive. • Joints: Butted.

- Perimeter joints: Accurately cut to match abutment and prevent movement.

720 DOORWAYS• Joint location: On centre line of door leaf.


27 4 Nov 2016


740 EDGINGS AND COVER STRIPS• Manufacturer: Submit proposals .

- Product reference: Submit proposals . • Material/ finish: Submit proposals . • Fixing: Secure with edge of covering gripped. Use matching fasteners where

exposed to view

750 STAIR NOSINGS AND TRIMS• Manufacturer: Submit proposals.

- Product reference: Submit proposals. • Material/ finish: Submit proposals. • Fixing: Secure, level and with mitred joints. Adjusted to suit thickness of covering

with continuous packing strips of hardboard or plywood. Nosings and packing strips bedded in gap-filling adhesive recommended by nosing manufacturer. - Screw fixing with matching plugs: Required.

760 STAIR COVERINGS - SEPARATE RISERS AND TREADS• Fixing: Accurately cut. Fit risers before treads.

770A SKIRTINGS ref S1 • Types: Tile, 100mm high sit-in skirting to match tiled floor.. • Manufacturer: Pilkingtons Regal.

- Product reference: Colour reference : Black finish: Matt. • Fixing: Secure with top edge straight and parallel with floor.

- Corners: Mitre joints. Coordinate with M40/110A

770B SKIRTINGS ref S2 • Types: SOFTWOOD, 100mm high, painted, colour: White. • Manufacturer: see P20.

- Product reference: see P20. • Fixing: Secure with top edge straight and parallel with floor.

- Corners: Mitre joints.

770C SKIRTINGS S3 • Types: VINYL 100mm vinyl coved skirting. • Manufacturer: Polyflor Ltd.

- Web: www.polyflor.com.- Email: [email protected]. . - Product reference: tbc .

• Fixing: Secure with top edge straight and parallel with floor. - Corners: Mitre joints. as clause 640A

770D SKIRTINGS ref S4 • Types: Ash finished, 100mm high. • Manufacturer: tbc.

- Product reference: tbc. • Fixing: Secure with top edge straight and parallel with floor.

- Corners: Mitre joints.


28 4 Nov 2016

780 TRAFFICKING AFTER LAYING• Covering types: all. • Traffic free period: Until adhesive is set.

COMPLETION

820 FINISHING PLASTICS FLOORING• Cleaning operations:

- Wash floor with water containing neutral (pH 6-9) detergent. If necessary, lightly scrub heavily soiled areas.

- Rinse with clean water, removing surplus to prevent damage to adhesive. Allow to dry.

• Emulsion polish: Two coats of a type recommended by covering manufacturer.

880 WASTE• Spare covering material: Retain suitable material for patching. On completion

submit pieces for selection. Hand over selected pieces to Employer.



29 4 Nov 2016


M60

Painting/clear finishing

No.


Purpose





30 4 Nov 2016

M60 Painting/clear finishing


COATING SYSTEMS

110A EMULSION PAINT To new plasterboard WALLS, EXPOSED SOFFITS, BULKHEADS ETC. ref W2

• Manufacturer:Crown Paints Ltd or similar approved Crown House, Hollins Road, Darwen, Lancs BB3 0BG Tel: 0845 389 9583 Fax: 0845 389 9584 - Web: www.crowntrade.co.uk - Email: [email protected] - Product reference: Vinyl Matt

• System code: D54. • Colour: As schedule to be agreed.

Surfaces: [As per Finishes Schedules]. - Preparation: - As clauses 400 - Tape and fill joints; and - Wash down surfaces] .

Initial coats: [10% thinned primer] . - Number of coats: [1] .

Undercoats: [As recommended by manufacturer] . - Number of coats: [1] .

Finishing coats: [Washable matt vinyl] . - Number of coats: [1] .

110B EMULSION PAINTTO new FF Blockwork WALLS, EXPOSED SOFFITS, BULKHEADS ETC.Ref W3

• Manufacturer: Crown Paints Crown House, Hollins Road, Darwen, Lancs BB3 0BG Tel: 0845 389 9583 Fax: 0845 389 9584 - Web: www.crowntrade.co.uk. - Email: [email protected] - Product reference: Diamond Matt

• System code: D54. • Colour: As schedule to be agreed.

Surfaces: [As per Finishes Schedules]. - Preparation: - As clauses 400 - fill joints - Wash down surfaces] .

Initial coats: [10% thinned primer] . - Number of coats: [1] .


Finishing coats: [Washable matt vinyl] . - Number of coats: [1] .



31 4 Nov 2016


110CEMULSION PAINT TO existing WALLS, EXPOSED SOFFITS, BULKHEADS ETC. Ref W4

• Manufacturer:Crown Paints or Similar approved Crown House, Hollins Road, Darwen, Lancs BB3 0BG Tel: 0845 389 9583 Fax: 0845 389 9584 - Web: www.crowntrade.co.uk. - Email: [email protected] - Product reference:Vinyl Matt

• System code: TBC. • Colour: As schedule to be agreed.

Surfaces: [As per Finishes Schedules]. - Preparation: - As clauses 440 - fill joints - Wash down surfaces] .

Initial coats: [suitable priming coat] . - Number of coats: [1] .


Finishing coats: [Washable matt vinyl] . as required to prevent 'Grinning through' - Number of coats: [1] .

130A GLOSS PAINT TO INTERNAL EXPOSED STEEL WHERE NO FIRE PROTECTION IS REQUIRED. • Manufacturer: Crown paints or Similar Approved

Crown House, Hollins Road, Darwen, Lancs BB3 0BG Tel: 0845 389 9583 Fax: 0845 389 9584 - Web: www.crowntrade.co.uk. - Email: [email protected] - Product reference: Acrylic Gloss

• System code: TBC-. • Colour: TO BE CONFIRMED.

Surfaces: [Uncoated] . - Preparation: [As clauses 400, 440 and Degrease and provide key] .

Initial coats: [As recommended by manufacturer] . - Number of coats: [1] .


Finishing coats: [Full gloss/SATIN] . - Number of coats: [1] .


32 4 Nov 2016


130B GLOSS PAINT TO EXISTING PAINTED SURFACES. • Manufacturer: Glidden, product of ICI AkzoNobel.

- Web: www.duluxtrade.co.uk. - Email: [email protected]. - Product reference: Acrylic Gloss






130C GLOSS PAINT TO NEW PAINTED SURFACES ARCHITRAVES DOORS SKIRTINGS DADOS AS REQUIRED

• Manufacturer: Crown Paints or Similar Approved Crown House, Hollins Road, Darwen, Lancs BB3 0BG Tel: 0845 389 9583 Fax: 0845 389 9584 - Web: www.crowntrade.co.uk. - Email: [email protected] - Product reference: Acrylic Gloss






160A DECORATIVE WOODSTAIN/ VARNISH/ PRESERVATIVE TO new INTERNAL SKIRTINGS/PROTECTION RAILS TO MATCH INTERNAL DOORS AND DOOR FRAMES

• Manufacturer: Contractor to source . - Product reference: Submit proposals .

• Surfaces: Skirtings and sundry trims . - Preparation: As clauses 400 .

• Initial coats: As recommended by manufacturer . - Number of coats: As recommended by manufacturer .

• Finishing coats: As recommended by manufacturer . - Number of coats: As recommended by manufacturer .


33 4 Nov 2016


160B DECORATIVE WOODSTAIN/ VARNISH/ PRESERVATIVE TO EXTERNAL WOOD FENCES AND GATES

• Manufacturer: SUBMIT PROPOSALS . - Product reference: SP .

• Surfaces: PREDECORATE COMPONENTS - ALL SURFACES INCLUDING THOSE COVERED UP . - Preparation: CLEAN .

• Initial coats: As recommended by manufacturer . - Number of coats: 2 .

• Finishing coats: 1 . - Number of coats: 1COAT IN PLACE .

180A FLOOR COATING TO GROUND FLOOR WORKSHOPS• Manufacturer: Crown.180B FLOOR COATING EPOXY TO AREAS AS SHOWN ON

FINISHES SCHEDULE (or use 180A) " Manufacturer: Janerol. - Web: www.janerol.co.uk. - T: 01933 626225. - Product reference: Industrial Grade Sigma two pack Epoxy Floor paint

" Colour: As finishes schedule. " Preparation: Prepare floor surface to manufacturers recomendations prior to floor recieving paint. " Finish: Add grit to create a non-slip finish to manufacturers recomendations.

- Product reference: Epimac (solvent free). • Surfaces: Power floated rc concrete slab or existing slabs see RDSs.

- Preparation: Dustproofed and free from oil and all other contaminants as Cl 400. • Initial coats: As recommended by manufacturer.

- Number of coats: 1. • Finishing coats: .

- Number of coats: 2. - Slip resistance value - water wet (minimum): PTV to BS 7976 of 45.

COLOURS - ALLOW FOR TWO GENERAL COLOURS GREY/GREEN AND YELLOW HAZARD MARKINGS.

195B SPECIAL COATING SAFETY GRIP WALKWAYS• Manufacturer: Submit proposals.

- Product reference: tbc. • Surfaces: fPower floated concrete floorr.

- Preparation: Wash down and degrease. • Initial coats: As recommended by manufacturer.

- Number of coats: tbc. • Undercoats: As recommended by manufacturer.

- Number of coats: tbc. • Finishing coats: tbc.

- Number of coats: tbc. - Slip resistance value - water wet (minimum): PTV to BS 7976 of 49.


34 4 Nov 2016


GENERALLY

212 BREEAM CERTIFICATION Volatile Organic Compounds All Decorative paints and varnishes used in the works: Provide Manufacturers/suppliers written certification/advice verifyifying VOC levels are in accordance with BS EN 133000:2001referred to the criteria of Decorative Paint Directive 2004/42/CE and are fungal and algal resistance

215 HANDLING AND STORAGE• Coating materials: Deliver in sealed containers, labelled clearly with brand name,

type of material and manufacturer's batch number. • Materials from more than one batch: Store separately. Allocate to distinct parts or

areas of the work.

220 COMPATIBILITY• Coating materials selected by contractor:

- Recommended by their manufacturers for the particular surface and conditions of exposure.

- Compatible with each other. - Compatible with and not inhibiting performance of preservative/fire retardant

pretreatments.

240 SURFACES NOT TO BE COATED• Doorsets.

280 PROTECTION• 'Wet paint' signs and barriers: Provide where necessary to protect other operatives

and general public, and to prevent damage to freshly applied coatings.

300 CONTROL SAMPLES• Sample areas of finished work: Carry out, including preparation, as follows:

Types of coating Location M60/ ALL SYSTEMS . Wall, Wall .

• Approval of appearance: Obtain before commencement of general coating work.

305 CONTROL SAMPLES• Sample areas of finished work: Carry out, including preparation, as follows:

Types of coating Nature of sample M60/ 110A, 160A . Wall , Floorl .

• Approval of appearance: Obtain before commencement of general coating work.

320 INSPECTION BY COATING MANUFACTURERS• General: Permit manufacturers to inspect work in progress and take samples of

their materials from site if requested.


35 4 Nov 2016


PREPARATION

400 PREPARATION GENERALLY• Standard: In accordance with BS 6150. • Suspected existing hazardous materials: Prepare risk assessments and method

statements covering operations, disposal of waste, containment and reoccupation, and obtain approval before commencing work.

• Preparation materials: Types recommended by their manufacturers and the coating manufacturer for the situation and surfaces being prepared.

• Substrates: Sufficiently dry in depth to suit coating. • Efflorescence salts: Remove. • Dirt, grease and oil: Remove. Give notice if contamination of surfaces/ substrates

has occurred. • Surface irregularities: Remove. • Joints, cracks, holes and other depressions: Fill flush with surface, to provide smooth

finish. • Dust, particles and residues from preparation: Remove and dispose of safely. • Water based stoppers and fillers:

- Apply before priming unless recommended otherwise by manufacturer. - If applied after priming: Patch prime.

• Oil based stoppers and fillers: Apply after priming. • Doors, opening windows and other moving parts:

- Ease, if necessary, before coating. - Prime resulting bare areas.

420 FIXTURES AND FITTINGS• Removal: Before commencing work remove: Coverplates, grilles, wall clocks, and

other surface mounted fixtures. • Replacement: Refurbish as necessary, refit when coating is dry.

425 IRONMONGERY• Removal: Before commencing work: Remove ironmongery from surfaces to be

coated. • Hinges: Do not remove. • Replacement: Refurbishment as necessary; refit when coating is dry.

430 EXISTING IRONMONGERY• Refurbishment: Remove old coating marks. Clean and polish.


36 4 Nov 2016


440 PREVIOUSLY COATED SURFACES GENERALLY• Preparation: In accordance with BS 6150, clause 11.5. • Contaminated or hazardous surfaces: Give notice of:

- Coatings suspected of containing lead. - Substrates suspected of containing asbestos or other hazardous materials. - Significant rot, corrosion or other degradation of substrates.

• Suspected existing hazardous materials: Prepare risk assessments and method statements covering operations, disposal of waste, containment and reoccupation, and obtain approval before commencing work.

• Removing coatings: Do not damage substrate and adjacent surfaces or adversely affect subsequent coatings.

• Loose, flaking or otherwise defective areas: Carefully remove to a firm edge. • Alkali affected coatings: Completely remove. • Retained coatings:

- Thoroughly clean to remove dirt, grease and contaminants. - Gloss coated surfaces: Provide key.

• Partly removed coatings: - Additional preparatory coats: Apply to restore original coating thicknesses. - Junctions: Provide flush surface.

• Completely stripped surfaces: Prepare as for uncoated surfaces.

481 UNCOATED WOOD• General: Provide smooth, even finish with arrises and moulding edges lightly

rounded or eased. • Heads of fasteners: Countersink sufficient to hold stoppers/fillers. • Resinous areas and knots: Apply two coats of knotting.

490 PREVIOUSLY COATED STEEL• Defective paintwork: Remove to leave a firm edge and clean bright metal. • Sound paintwork: Provide key for subsequent coats. • Corrosion and loose scale: Take back to bare metal. • Residual rust: Treat with a proprietary removal solution. • Bare metal: Apply primer as soon as possible. • Remaining areas: Degrease.

500 PREPRIMED STEEL• Areas of defective primer, corrosion and loose scale: Take back to bare metal.

Reprime as soon as possible.

511 GALVANIZED, SHERARDIZED AND ELECTROPLATED STEEL• White rust: Remove. • Pretreatment: Apply one of the following:

- 'T wash'/ mordant solution to blacken whole surface. - Etching primer recommended by coating system manufacturer.

521 UNCOATED STEEL - MANUAL CLEANING• Oil and grease: Remove. • Corrosion, loose scale, welding slag and spatter: Remove. • Residual rust: Treat with a proprietary removal solution. • Primer: Apply as soon as possible.


37 4 Nov 2016

541 UNCOATED ALUMINIUM/ COPPER/ LEAD• Surface corrosion: Remove and lightly key surface. • Pretreatment: Etching primer if recommended by coating system manufacturer.

560 UNCOATED CONCRETE• Release agents: Remove.

590 UNCOATED PLASTERBOARD• Depressions around fixings: Fill with stoppers/ fillers

APPLICATION

711 COATING GENERALLY• Application standard: In accordance with BS 6150, clause 9. • Conditions: Maintain suitable temperature, humidity and air quality during

application and drying. • Surfaces: Clean and dry at time of application. • Thinning and intermixing of coatings: Not permitted unless recommended by

manufacturer. • Overpainting: Do not paint over intumescent strips or silicone mastics. • Priming coats:

- Thickness: To suit surface porosity. - Application: As soon as possible on same day as preparation is completed.

• Finish: - Even, smooth and of uniform colour. - Free from brush marks, sags, runs and other defects. - Cut in neatly.

• Doors, opening windows and other moving parts: Ease before coating and between coats.

720 PRIMING JOINERY• Preservative treated timber: Retreat cut surfaces with two flood coats of a suitable

preservative before priming. • End grain: Coat liberally allow to soak in, and recoat.

730 WORKSHOP COATING OF CONCEALED JOINERY SURFACES• General: Apply coatings to all surfaces of components.

751 STAINING WOOD• Primer: Apply if recommended by stain manufacturer. • Application: Apply in flowing coats and brush out excess stain to produce uniform

appearance.

800 GLAZING• Etched, sand blasted and ground glass: Treat or mask edges before coating to

protect from contamination by oily constituents of coating materials.



38 4 Nov 2016


M61

Intumescent coatings for fire protection of steelwork

No.


Purpose





39 4 Nov 2016

M61 Intumescent coatings for fire protection of steelwork

To be read with Preliminaries/General conditions

PROTECTIVE COATING SYSTEMS

110 ON SITE COATING TO PRIMED STEEL INTERNAL STEELWORK• Use/ location: Exposed internal faces of columns, beams, bracing and other

structural steelwork, but excluding cladding rails. All surfaces requiring Fire Protection and not fire protected by other means to be fully coated with particular attention to junctions between columns and beams. All site works are to be completed to the standards of clauses420,440,460,490,520,530. .

• Fire resistance to BS 476-21: 60 minutes. • Preparation and priming: By steelwork contractor, as section G10.

- Primer: Zinc phosphate, as recommended by intumescent coating manufacturer.

• Intumescent coat: - Manufacturer: Submit proposals.

Product reference: Submit proposals. - Finish: Non-visible areas: Basic, as clause 440 and Visible areas: High decorative,

as clause 460. • Top sealer coat: Type recommended by intumescent coating manufacturer.

- Dry film thickness: As recommended by manufacturer. - Colour: to be confirmed.

• Bolt head/ nut protection: Fire insulating caps.

150 OFF SITE COATING TO UNPRIMED STEEL ALTERNATIVE TO SITE APPLIED IF REQUIRED• Use/ Location: Exposed internal faces of columns, beams, bracing and other

structural steelwork, but excluding cladding rails. All surfaces requiring Fire Protection and not fire protected by other means to be fully coated with particular attention to junctions between columns and beams. All site works are to be completed to the standards of clauses420,440,460,490,520,530. .

• Fire resistance to BS 476-21: 60 minutes. • Preparation: Blast clean as clause 315. • Primer: Zinc phosphate, as recommended by intumescent coating manufacturer.

- Manufacturer: Submit Proposals. Product reference: Submit Proposals.

- Dry film thickness: As recommended by manufacturer. • Intumescent coat:

- Manufacturer: Submit Proposals. Product reference: Submit Proposals.

- Finish: Concealed areas: Basic, as clause 440 and Visible areas: High decorative, as clause 460.

• Top sealer coat: - Dry film thickness: As recommended by manufacturer. - Colour: to be confirmed.

• Bolt head/ nut protection: Fire insulating caps.



40 4 Nov 2016


GENERAL REQUIREMENTS

205 VALIDATION OF MATERIALS• Project specific evaluation of intumescent coating materials:

- Standard: To BS 8202-2, clause 4. - Test results: Submit on request.

210 WORKING PROCEDURES• Standard: To BS 8202-2. • Give notice: Before commencing surface preparation and coating application. • Quality control: Record project specific procedures for surface preparation and

coating application.

215 WORKING CONDITIONS• General: Maintain suitable temperature, humidity and air quality during coating

application and drying. • Surfaces to be coated: Clean and dry at time of coating application.

220 APPLICATOR'S PERSONNEL• Operatives: Trained/ experienced in anticorrosive and intumescent coatings. • Evidence of training/ experience: Submit on request.

270 INSPECTION• Permit intumescent coating manufacturer to:

- Inspect work in progress. - Inspect quality control records. - Take dry film thickness and other measurements. - Take samples of coating products.

• Intumescent coating manufacturer's inspection reports: Submit without delay.

280A OFF SITE COATED STEEL• Handling and erection: Use methods and devices designed to minimise damage

to intumescent coatings. All damage to be scheduled and repaired in accordance with the manufacturer's recommendations to the standards stipulated in Clauses 150, 420,440,460,490,520,530

PREPARATION OF SURFACES

315 NEW STEEL - BLAST CLEANING• Preparation: Remove oil and grease. • Blast cleaning:

- Atmospheric condition: Dry. - Abrasive: Suitable type and size, free from fines, moisture and oil. - Finish: To BS EN ISO 8501-1, preparation grade SA2½, with an average profile of

approximately 75 micrometres. - Abrasive residues and moisture: Remove.

• Primer: Apply as soon as possible after cleaning and before gingering or blackening appears.


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APPLICATION OF COATINGS

410 INTUMESCENT DRY FILM THICKNESS (DFT)• Required dft: Determine for every steel member to give specified period of fire

resistance. Use intumescent coating manufacturer's current published loading tables. - Special sections and partial fire exposure conditions: Obtain required dft in

writing from manufacturer. • Schedule and drawings: Submit at least two weeks before starting work.

- Schedule content: Member sizes, weights/thicknesses, loading conditions, etc. showing, for each variant, the exposed perimeter/ sectional area (Hp/A) ratio and required dft.

- Drawing content: Steelwork drawings marked in colour to show required dft for each member.

420 MEASUREMENT OF INTUMESCENT DFT• Primer dft: Determine average dft (for deduction from total dft after application of

intumescent). • Intumescent dft: Determine at:

- 500 mm centres along each coated plane of universal sections (8 planes), and rectangular hollow sections (4 planes).

- 125 mm centres along coated circular hollow sections, spread evenly around circumference.

• Acceptance standard: - Average intumescent dft: Not less than required dft (exclusive of primer and top

sealer). - Local intumescent dft: Not less than 80% of required dft. Areas greater than 100

mm equivalent diameter with a dft of less than 80% of required dft must be brought up to thickness.

440 BASIC FINISH• Definition: Reasonably smooth and even. Orange peel, other texture, minor runs

and similar minor defects are acceptable.

460 HIGH DECORATIVE FINISH• Definition: High standard of evenness, smoothness and gloss when viewed from a

minimum distance of 2 m.

490 TOP SEALER COAT• Application: To achieve dft recommended by manufacturer and to give an even,

solid, opaque appearance, free from runs, sags and other visual defects.

520 COMPLETION OF OFF SITE COATED STEEL• Exposed unprotected areas, including fixings: Following erection of steelwork,

apply intumescent coating locally. • Unscheduled additional connections to erected steelwork: Remove and reinstate

intumescent coating locally.


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530 RECORDS OF COATED STEEL• On completion of intumescent coating work, submit:

- Accurate surface preparation and coating application records. - Fire resistance certificates. - Intumescent coating manufacturer's recommendations for maintenance and

overcoating.



43 4 Nov 2016

160720 aec extension city 1 4 nov 2016 of bristol college · - mass of test weight: 4 kg. •...

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