THE  SOLID  WOOD  FLOORING  COMPANY

E720 Light Fumed Engineered OAK Plank

K21 Wood strip / board / board fine flooring / linings NBS Specification produced for:

Brown and Carroll

PROJECT: Rathbone

Floor Type: Expresso Dark Colour

Prepared by: MR 4/21/2016  

FLOOR TYPE E720 Engineered Timber Floor on Danskin Cradle system installed fully bonded to BS8201:2011 Code of practice for installing wood flooring.

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THE SOLID WOOD FLOORING COMPANY

 

 

 

E720 Fumed Oak UV Oil Finish

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INDEX

Page 4 NBS K21 / Substrate

Page 5 NBS K21 / Wood Flooring

NBS K21 / Storage

Page 6 NBS K21 / Acclimatisation

NBS K21 / Fitting

Page 7 NBS K21 / Protection

NBS K21 / Other Requirements

Page 8 NBS K21 / Product Performance Requirements

NBS / K21 Sustainability

Page 9 NBS K21 / Responsibilities

Page 10 NBS K21 / Under floor heating fitting guide

 

 

 

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NBS  specification  for  fitting  Engineered  Wood  Flooring  

K21     Wood  strip  /  board  /  board  fine  flooring  /  linings  To be read with Preliminaries/General conditions.

WOOD FLOORING TO RESIDENTIAL UNITS:

Project Rathbone

FULLY BONDED TO P5 CHIPBOARD ON AN ACOUSTIC CRADLE & BATTEN SYSTEM SUBSTRATE Danskin Acoustic Cradle System

Preparation: Clean, dry firmly secured, smooth, even, and free from abrupt changes in

level. Relative Humidity: Above the substrate when tested with a hygrometer to BS 8201, Appendix A

At the time of installation and at all subsequent times the RH within the rooms and areas into which the flooring is installed must remain within the upper/lower range of 30% - 65%. It is the responsibility of the Main Contractor (during construction phase), Building Manager or Occupier (post construction) to ensure that the RH does not deviate beyond these upper/lower limits. Ideally the environment within the rooms and areas where flooring is to be installed will be actively and dynamically managed by an intelligent BMS system to maintain the RH within the acceptable range.

Moisture: Prior to installation and laying, the moisture content of the substrate is to be

checked, in the case of the Danskin acoustic system the substrate is typically a P5 chipboard and hence the moisture content must be in the range of 6% to 9% when tested with a Hygrometer as described in BS8201:2011. If the results are outside these parameters, then installation should not take place as there is a potential that the adhesive bond may subsequently fail due to the differential movement between the P5 chipboard and the flooring.

If the RH is maintained within the acceptable limits stated above, then the

moisture content of the P5 chipboard will remain within acceptable limits. However, the risk of flood or similar inundation cannot be entirely ruled out, hence if such a situation occurs, then the chipboard must be adequately dried or replaced before flooring can be bonded to it.

Test points: All corners, around perimeter, and random points over area being tested. Drying aids: Turned off for not less than 4 days before testing. If dehumidifiers are used

then no wood flooring should be on site during this time. Surface: Smooth, even, and free from abrupt changes in level. Apply suitable

smoothing compound, as necessary.

Surface regularity: The surface regularity when checked with a 3 m straightedge with 3 mm feet at each end, placed anywhere on the surface, will achieve SR2 to BS8204 and have no gap greater than 6 mm, and straightedge will not be obstructed by the substrate.

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Subfloor Build Up: Danskin cradle and batten acoustic floor system). The 18mm thick P5 T&G chipboard forms an enclosed floor void, into which a LTHW ‘wet pipe’ underfloor heating system is installed. Below this is a structural concrete slab, approx. 50mm rigid foam insulation, LTHW UFH pipes fixed to the top of the insulation, circa 50mm air gap.

SITE VISIT: We always recommend that a site visit is arranged prior to delivery and installation of any wood flooring. TSWFC Technical Director along with a senior representative from Sika will visit the site and inspect all aspects of the subfloor and environmental conditions and will produce a report having tested both humidity and moisture level. Advice will be given on when the wood flooring should be delivered, acclimatised if necessary and then when fitting should start. This is specialist free of charge (in the UK) service to ensure conditions are right.

WOOD FLOORING:

Free from decay, through splits and insect attack (including ambrosia beetle damage, unless permitted in the class/ grade specified).

Manufacturer: The Solid Wood Flooring Company - Tel: 01666 504015 Email: info@thesolidwoodflooringcompany.com

Product reference: E720 – Engineered Fumed Oak  Flooring  Plank. Species: Oak FSC 100% Appearance: Class / Grade: To BS EN 942, AB Grade with sound knots up to 10mm

permitted. Board size: 20mm thick x 280mm wide x 2200 long with a 4mm top layer. Edges: Long edges: 1.5mm bevelled tongued & grooved, Ends: Square Finish: Light fumed and then finished with a UV Oil Top Layer: Solid Oak - 4mm cut veneer adhered to a multi ply backing with Dynea wood

adhesives designed for use with under floor heating Moisture Content: The moisture content of the wood flooring boards should be maintained at

between 6% and 9%

Manufactured boards cured and kiln dried to balance the moisture content of all components.

Adhesives: Adhesives used in the manufacture of Solid Wood Flooring boards are

supplied by Dynea. Formaldehyde: When tested to EN 717 – part 1 the release of formaldehyde in wood flooring

construction materials must have a formaldehyde content of less than 3 parts per million.

Solid Wood Flooring boards tested to EN 717: part 1 achieve results of 0.014 mg / m3 which converts to 0.0053 parts per million.

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STORAGE:

The wood flooring boards are to be stored in conditions where no moisture can attack them. It is important that all wet trades have been completed before any boards are received on site. Storage conditions should have a Relative Humidity of less than 30% and more than 65%.

ACCLIMATISATION:

Where the boards are to be fitted over under floor heating the heating must be commissioned and fully operational before the wood flooring is delivered to site. It should then be left to acclimatise in the general location of the room/areas where it is to be laid for at least 14 days before they are fitted. Concurrently the underfloor heating should be operating at normal temperatures to precondition the chipboard subfloor. The cartons: Must be stacked a minimum of 50mm off any floor Must be stacked a minimum of 500mm from any wall. Must be fully supported along their lengths, Should be opened at each end to assist acclimatisation.

FITTING: Flooring to be laid fully bonded and to be fitted in accordance with BS 8201:2011 - Code of Practice for Flooring of Timber, Timber Products and wood based panel products. The guide to fitting Parquet floors should be used to ensure “Crown” lines are accurately set out to guarantee a professional installation.

Moisture: Moisture content of the boards at the time of laying is to be 6-9%. Pattern: As laid. Method of finishing: Prefinished boards with builders clean.

Bonding: The Engineered boards are to be laid fully bonded using SW890 adhesive

The adhesive to be applied with a 6mm notched trowel to provide a solid bed of adhesive between the base of each board and the substrate

Fitter: The wood flooring fitter will be responsible for ensuring that the site conditions comply with BS8201:2011. The wood flooring fitter is responsible for using the wood boards to create a finished floor that complies with good working practice and generally in accordance with BS8201:2011. It is recommended that a representative area of flooring is loose laid to demonstrate the range and variation of colour and grain to the Architect/Main Contractor as a benchmark prior to undertaking full scale installation. The wood flooring fitter is responsible for checking that every board is of the desired quality and suitable for use before, during and after fitting and if there is any doubt, boards should not be fitted.

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Fitters/Builders clean On completion of fitting the surface of the boards should be vacuumed to

remove any particles of wood or sawdust, ensuring that no residues from any of the fitting and other trades remains attached to the surface of the boards.

The fitter should clean the boards with the recommended cleaner and ensure that the Main Contractor, Building Manager and Occupiers understand how the wood flooring should be cleaned and maintained.

The Solid Wood Flooring Company will provide a cleaning and maintenance manual to give to each Occupier to ensure that they know how to clean and maintain the wood floor.

PROTECTION Protective covering: Submit proposals - Remove at completion

Should the installed wood floor need protection from other trades, then the boards should be covered with a 1.5mm to 2mm breathable layer and then hardboard/MDF with all joints taped. Any under floor heating should be fully commissioned and working correctly before the floor is laid but it should be switched off during installation and should not be turned on until the protection has been removed

NEVER cover the floor with any impervious materials which could cause the boards to sweat and affect the structure of the boards NEVER create potential ‘Hot Spot’s’ by placing any thick or rubber backed rug’s on the finished floor which could cause a heat build-up and damage the structure of the boards.

OTHER REQUIREMENTS:

Expansion: PERIMETER – A minimum 10mm expansion gap is required around the perimeter of the floor and/or where the wood flooring meets differing materials.

LONG ROOMS - Should the floor dimensions exceed 8 linear metres in any one direction, then extra provision should be made for expansion and expansion gaps of up to 8mm should be designed into the floor. DAY WORK JOINTS - Day work joints are not appropriate in this instance, but can be bridged if necessary CONSTRUCTION JOINTS - Any construction joints that run across the floor must not be bridged and expansion joints should be installed at these points and designed to follow the line of the construction joint.

Aesthetics: It is the art of the fitter to ensure that fitting is conducted to achieve an acceptable blend of shade variation, colour and knotting which are all inherent characteristics of any natural wood product

DPM: As designed into the floor

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PRODUCT PERFORMANCE REQUIREMENTS: ENVIRONMENT: For wood flooring to retain its integrity its moisture content must

remain at around 8%. Humidity controls in hermetically sealed buildings must control the Relative humidity between 30% to 65% (maximum). Managing relative humidity and moisture levels, can prove to be difficult for a professionally qualified engineer and this becomes increasingly difficult for end users particularly with the changes in seasonal conditions. Refrigerated air conditioning will dry the air below 30% and it is crucial that any air-conditioning units have moisture controls and humidifiers.

Load bearing: Conform to BS 6399-1: 1966 table 1 section 3 Reaction to fire: Perform to EN 13501-1 Dn s1 Slip Resistance: Tested to BS 7967-2: 2002 (Pendulum Test) Requirement LOW 36+PTV’s MODERATE 25 – 35 PTV’s HIGH 0 – 24 PTV’s UV Oiled Results: DRY (61) LOW RISK WET (29) MODERATE RISK Thermal Conductivity: EN ISO 10456 and EN ISO 12664 Result 0.15 W/(mk) Release of Formaldehyde

Tested to EN 717 – 1 Result 0.014 mg / m3 Requirement: Less than 3 ppm Result: 0.0053 ppm Moisture Content EN 13183 - 1 6% to 9% <7% Thermal Conductivity EN ISO 10456 EN ISO 12664 Result 0.15 W / (mk) SUSTAINABILITY: The wood flooring species should not be listed in the CITES Appendices or on the IUCN Red List of Threatened Species. BRE GREEN GUIDE

A generic product of this type would correspond to Element Number 1321580001 of the BRE Green Guide 2008 ratings and achieve a rating of A+. The actual Kg/m2 achieved will be dependent on the type of fitting chosen.

The Solid Wood Flooring Company recommend that as a basis for achieving this result all fitting must conform to BS8201:2011

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COMPANY APPROVALS: The Solid Wood Flooring Company are:

Members of The Timber Trade Federation

Operate and are audited to the TTF Responsible Purchasing Policy

FSC - Solid Wood Flooring Certificate Code: RA-COC-005535 FSC - Solid Wood Flooring License Number: FSC-C007915 FSC - Solid Wood Flooring Chain of Custody Number: RA-COC-005535 HA PEFC - Solid Wood Flooring Licence Number: PEFC/16-37-1814 PEFC - Solid Wood Flooring Certificate Number: CATG-FEFC-400-AT

RESPONSIBILITIES

Specifier: The specifier should ensure that the wood floor specified is suitable for use.

Manufacturer: The manufacturer will take responsibility for the performance of the boards provided that they were received on site in good condition, stored in the correct manner and have been fitted in accordance with BS8201:1987

Contractor: The contractor will be responsible for the ensuring that the wood boards are

not received on site until all conditions are correct within the guidelines of BS8201:1987.

The contractor will be responsible for making sure the boards are kept safe on site. The contractor is responsible for the correct laying of the boards. The contractor is responsible for ensuring that the finished floor is correctly protected in between the completion of the fitting and the handover to the client.

Fitter: The wood flooring fitter will be responsible for ensuring that the site

conditions comply with BS8201:2011.

Wood flooring, because it is a natural product, will have inherent characteristic such as shade variation, different graining and knotting.

The wood flooring fitter is the expert responsible for working with the materials, and it is the art of the fitter to re-manufacture the wood flooring materials and create a finished floor.

The wood floor fitter is the only person who has the opportunity to inspect every individual board, therefore the responsibility for selecting and fitting each board, will always remain with the fitter. The wood flooring fitter is responsible for using the wood boards to create a finished floor that complies fully with the architect’s/contractors instructions in accordance with BS8201:1987.

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The wood flooring fitter must ensure that the contractor understands what the finished floor will look like before starting fitting. The wood flooring fitter is responsible for checking that every board is of the desired quality and suitable for use before, during and after fitting and if there is any doubt, boards should not be fitted.

UNDER FLOOR HEATING FITTING GUIDE Acclimatisation Before fitting the Engineered wood flooring will require 14 days to acclimatise

to the same conditions that they will experience in use.

Storage The cartons of wood should not be received onto site until all wet trades have been completed

The cartons should then be stored in the same conditions that they will

experience in use as described in BS8201:1987 The cartons of wood should be stored at least 50mm off the ground and

supported along their whole length either on pallets or battens The cartons should be no nearer than 500mm to any wall The ends of the cartons should be opened to allow the air to penetrate into

the boards

Before fitting The under floor heating system should be fully commissioned and fully operational with all components in place before any fitting commences

The under floor heating system should be switched off at least 48 hours

before any fitting commences. Temperature Control: These sensors must be installed in the screed before the floor is installed,

and would be wired to a thermostat on the wall, which would prevent the surface temperature of the screed exceeding 27 degrees even if the mixing manifold was altered and thermostats turned up too high.

During Fitting The under floor heating should remain off whilst the wood flooring is being

fitted No other trades should be allowed in the vicinity of the floor during this time

After fitting Once all fitting has been completed the floor should be left for 24 hours before it is walked on

Heat introduction The heating should not be switched on until 72 hours after fitting has been

completed The under floor heating should then be switched on at, increasing the

temperature by no more than 2 degrees per day to its lowest heat probably approximately 18⁰C at finished floor level

The heat should then be gradually increased by 1⁰C every 24 hours and THE

HEAT SHOULD NEVER EXCEED 27⁰C AT FINISHED FLOOR LEVEL It is recommended that temperature control devices are designed into

the floor to ensure that the temperature is controlled at finished floor level.

Further information and advice can be found in the Technical Library on the Company’s Web Site

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Unit  1,  Helena  Court,  Hampton  Street,  TETBURY,  Gloucestershire,  GL8  8JN  

01666  504015  

www.thesolidwoodflooringcompany.com