uniclass epic l352:p4142 october 2010 britmet tileform · tactray 90. the complete building...

Tactray 90. The complete building envelope solution

Uniclass EPICL352:P4142

CI/SfB

(29) Hh2

October 2010

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Tactray 90. The complete building envelope solution

Welcome to

BritmetTileformBritmet Tileform is a leadingBritish manufacturer offeringa wide range of productsand systems for the roofingand cladding industry.

Our comprehensive Tactray productrange includes structural liner traysupport systems, metal slate and tiledroofing systems, built up metal wall androof systems. We supply a wide rangeof accessories including standard andpurpose made flashings, gutters anddownpipes. In addition we can alsosupply fixings and insulation material.

From technical advice at the start, or during a project, to careful orderprocessing, through to delivery where and when you want it - Britmet Tileformwill help ensure that your project runssmoothly and cost effectively.

Britmet Tileform is the largest britishmanufacturer of lightweight roofingsystems in the UK.

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03 > Structural support system for slates and tiles A structural metal tray lining system, replacing traditional timber rafters.

20 > Structural support system for roofing An ideal structural tray to support a wide range of roofing systems including secret-fix standing seam, lead, zinc, copper, green roofs and single ply membranes.

26 > Structural support system for wall cladding The perfect structural tray, designed to provide support for metal cladding, rainscreen systems, vertical tiling and timber boarding and shingles.

30 > Structural ceiling system A structural tray specifically designed to encapsulate andsupport failing and ageing CLASP, SEAC or similar modularroofing systems. Trays provide a ready finished ceiling,perforated for acoustic solutions.

34 > Handling and performanceA brief overview of best practice covering transport, handling and storage, as well as detail on Tactray 90performance and maintenance.

36 > Case studiesA selection of recent projects.

Britmet Tileform

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Structural support system for slates and tiles <A structural metal tray lining system,replacing traditional timber rafters.

The modern way to a traditional roof

Tactray 90

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To meet the growing requirement for faster construction methods to facilitate earlier project handover, BritmetTileform has developed Tactray 90 for use on low andmedium rise buildings.

Replaces timber raftersTactray 90 is a structural metal tray lining systemwhich replaces timber rafters. Each tray side-laps its neighbour to form a unique air sealedsystem running from eaves to ridge fixed directlyto the purlins. Tactray 90 creates a structuralsupport for all types of roof system, without thecongestion or fire risk of a timber construction. It does not affect the practice of tiling or slating,since the installation of underlay, battens andtiles remains identical and externally thecompleted roof displays no visible evidence of its use. The light weight and inherent structuralstrength of Tactray 90 gives good spanningperformance for a variety of roof coveringsincluding fibre-cement slates, heavy stone tilesstanding seam and lightweight systems.

Meets legislationTactray 90 meets the requirements of theBuilding Regulations 2006 and the standardconstruction is BBA certified.

The flexibility of the system facilitates theintegration of insulation zones havingproperties tailored to suit specific needs. In this way, a range of thermal performancecharacteristics can be achieved beyond theminimum requirement under ADL2.

Versatility of applicationTactray 90’s ease of installation and assuredperformance make it ideally suited for allbuilding types where early completion isadvantageous. Projects completed to dateinclude hospitals, schools, supermarkets,sports centres, industrial units and commercial developments.

Easy to installDesigned for ease of installation, Tactray 90 is easily cut on site and is fixed byBritmet Tileform recommended contractors,widely experienced in the installation ofstructural metal tray systems under both tiled and slated roofs.

FlexibilityThe BBA Approved Tactray 90 StructuralSupport system for roofs gives the specifier:

• A range of U-values• Strong acoustic performance

where specified• The ability to carry a range

of external finishes• Large span capabilities

Acoustic performanceA perforated option of Tactray 90 is availableand, dependent on the specification, can beused to achieve:

• 37db sound reduction• 30% sound absorption

Higher and lower levels of sound reductionand absorption can be achieved dependanton various grades of acoustic insulation boards specified. Please consult BritmetTileform for further information.

Top left: Surf Centre. Newquay, Cornwall.

left: Skoda Showroom, Bristol

Saves time, trouble and money

Earlier completionTactray 90 offers significant reductions inbuilding completion times by providing asecure and weatherproof overhead canopy atan early stage in the programme. This meansthat finishing trades can work beneath itbefore the final weathering is introduced,thereby removing the roof construction fromthe critical path.

Independent research by a firm of charteredquantity surveyors has shown that the contractperiod can be reduced by up to 10% - four weeks on a typical 40-week project.

Saves building costsOn hundreds of successfully completed projects, Tactray 90’s higher overall efficiencyas a white finished ceiling soffit hasconsistently proven that total costs are actuallyless than apparently cheaper methods such astimber rafters and plastered ceilings.

Reduces steelwork costsBecause of its inherent structural strength,Tactray 90 requires fewer supports, permittinggreater purlin spacings and significantlyreducing the weight and cost of the structuralsteelwork.

Right: Beach restaurant, SauntonSands Hotel, Devon.

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Exceptional roofing performance

Cuts finishing costsInside the building Tactray 90 provides anattractive decorative ceiling without the time, costand vapour-control problems of more traditionalsystems using suspended ceilings. It features apleasing ‘planked’ effect that runs from eaves to ridge, and the optional brilliant white internalfinish gives a bright, attractive interior withstrong reflective qualities and subsequentreductions in lighting costs. Tactray 90 can alsobe used as a soffit for over-sailing eaves detailsprovided that a suitable exterior paint is applied.Note: further colours available upon request.

Air leakage controlThe Building Regulations include a requirementto control air leakage through the buildingenvelope. The current requirement is for amaximum air leakage standard of 10m3/HR/m2

at a pressure difference of 50 pascals. In independent tests carried out by the BritishBoard of Agrement Tactray 90 achieved an airleakage rate of 4.1m3/HR/m2 at 50 pascals - considerably better than the maximum air leakage standards.

High vapour resistanceTactray 90 incorporates a factory fitted sideflange vapour control seal along the entirelength of the tray. This significantly reduces the risk of interstitial condensation within theinsulation zone. Allowing a maximum internalrelative humidity of 86% for an internaltemperature of 20Oc and external temperature of 5Oc.

Better fire protectionFlame-resistant Tactray 90 has a Class O firerating. It provides a non-combustible lining, andcan resist fire penetration from inside to outsidefor much longer than required by the BuildingRegulations.

Whether specified as galvanised or in itsoptional white finish, Tactray 90 helps preventthe spread of flame and continues to supportthe roof covering during evacuation and firefighting. This provides much-improved fire safetyin terms of both life and financial loss.

Secure underliningAs a secure barrier beneath the completed roof,Tactray 90 provides a short-term weatherproofseal against the elements, should the slatesbecome dislodged. It also prevents access byintruders where high value goods are stored. Its continued integrity also offers enhancedsecurity for police stations and prisons, etc.

Below: Supermarket entrance.

Right: Eveswell Primary School. Newport.

Tactray 90

The system

DescriptionThe distinctive ‘U’ shape of Tactray 90 is rolled to provide underlapping and overlapping legs. The underlapping legincludes a factory-applied vapour control gasket to limit the passage of moisture vapourat the side laps. As each tray is positioned, the underlapping leg is firmly located by a small tab pressed into the overlappingupstand, helping to ensure a flush alignmentto the underside of the trays (see overleaf).

Principles of constructionTactray 90 replaces timber rafters withoutaffecting the installation of underlay, battensand tiles. The trays are secured through thepan to the purlins using washered fixings, and a system of timber counterbattens isincorporated to support the hip and eavesdetails and aid the roofing contractor.

It is recommended that the counterbattens be fixed at centres not exceeding 600mm.Once these are secured, the structure is completed using a conventional felt andslate/tile roof finish.

Key to Tactray 90 system1. Low-density polyethylene filler supplied

by Britmet Tileform, is laid at ridgeand eaves prior to fixing Tactray 90.Alternatively a gun applied mastic may be used in place of the polyethylene foam filler.

2. Galvanised underside as standard. An optional white internal finish isavailable and other colours may bepossible according to quantity. Please refer to Britmet Tileform’s commercialteam for details.

3. 50 x 50mm counterbattens* are secured to the upstands at 600mm centres using self-drilling fixings which must penetrateboth thicknesses of steel in order to ensureadequate pull-out strength.

4. Secondary 50 x 25mm counterbattens are nailed at approx 300mm centres.

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5. TacMat Plus insulation is laid in the pans.This is available from Britmet Tileformin 140mm and 180mm thicknesses. Other insulation types are available onrequest to achieve required U-values.

6. Self-adhesive insulation hangers, or ‘stick pins’, are available from BritmetTileform. Fixings at 3m centres arerecommended on steep pitches toprevent ‘slumping’ of the insulation.

7. Britmet Tileform breather membrane with amaximum vapour resistivity of 0.25 mN/s/g.

8. A complete range of flashings is available from Britmet Tileform in white orgalvanised finish. All flashings are made to order from drawings submitted by the contractor to suit the dimensions of each project.

9. Fixings. All fixings to suit Tactray 90 areavailable from Britmet Tileform, please seetable four on page 18 for more details.

*Various batten depths and other construction options can be provided to suit a range of U-values, please contact us for details.

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0208

Design considerations

Tactray 90 sizesTactray 90 is available to order in lengths upto 20m, depending upon site access andtransport requirements, and can be utilised in single, double or triple span configurations.

Tactray 90 ‘U’ valuesConstruction systems for U values rangingfrom 0.25 W/m2K to 0.10 W/m2K areavailable. Please contact the Britmet Tileformcommercial team for further details.

See pages 12 through to 17 for constructiondetails. Please contact Britmet Tileform’scommercial team for further details.

Thermal insulationTable 2 indicates the ‘U’ value calculationsbased on the construction detail shown left.

Gauge Weight (kg/m2) Load (kN/m2)

0.75 8.83 0.09

1.00 11.78 0.12

1.25 14.72 0.15

1.50 17.35 0.17

Table 1: Gauges

Insulation Type Thickness (mm) Lambda (W/m2K) U-value (W/m2K)

TacMat 140 Plus 140 0.037 0.25

TacMat 180 Plus 180 0.037 0.20(165 compressed)

TacMat 200 Plus 200 0.037 0.18(190 compressed)

TacMat 140 Plus 190 0.037 0.16

Table 2: ‘U’ Values (derived from BBA guarded hot box test)

Note: The ‘U’ value for 140mm is a guardedhot box test value. Test carried out by the BBAat its Watford laboratory. Test report No. 1883.

100mm

31mm27mm

500mm

90mm

Alignment tab ensures a flush finish

Factory-applied vapour control gasket

Tactray 90 dimensions and design features

+ 50mm PIR Board

Tactray 90

0402

Loads and spans

Roof loadingsThe primary function of Tactray 90 is tosupport the dead and live loads associatedwith the roof. The dead load is defined asthe weight of the roof covering, insulationzone, timber battens and the like. Live loadsare superimposed loads associated withaccess, wind and snow. Service loads fromheating, ventilation and lighting systemstogether with ceiling loads must also betaken into account where these are to besupported by the Tray.

The weight of roof loads can varyconsiderably from 7-11kg/m2 with a Britmet Tileform steel tile sheet to 80-90kg/m2 with a reconstituted stone slate.Imposed loads are taken as a minimum of0.6 kN/m2 plus any other transient loadssuch as positive or negative wind loads and snow drift.

Spanning performanceTactray 90 achieves excellent spanning performance as indicated in table overleaf. Once all relevant loadings have beencalculated, the table overleaf can be used to determine the gauge of Tactray and the purlin spaces required.

Structural calculationsIn addition to sustaining loads acting on theface of the tray, Tactray 90 can be used totransfer lateral loads. These lateral loads fromwind pressure on the walls of the building aretransferred through the length and/or width ofthe tray. The method of construction is calleddiaphragm or stressed skin.

Britmet Tileform recommends that specific engineering requirements areconsidered at an early design stage.Project specific calculations can beprovided by Britmet Tileform. Thestructural calculations can confirm theperformance characteristics of Tactray 90,relevant to each individual project.

NB - The cost of these calculations can be linked to the supply price of Tactray 90 as long as delivery of materials occurs within threemonths of calculation being provided. Alternatively, payment of calculation costs will become due immediately after the three monthperiod is complete. Payment of calculations will also become due If Britmet Tileform do not secure Tactray 90 order or if the project iscancelled.

To calculate the load from a typical weight use the following formula:

= kN/m2Weight (kg/m2) x 9.81

1000

System benefitsSpeed and ease of construction

- Reduces overall contract times by allowinginternal trades to commence at a muchearlier stage.

- Provides a working platform

- Patented ‘tab’ side lap support systemensures a flush finish.

- Comprehensive technical support,including structural design, acoustic andthermal calculations.

Technical performance

- Flexible system with choice of insulationzone to deliver a range of thermalperformance characteristics beyond theminimum requirement under ADL2.

- Meets the requirements of Approveddocuments B and F2.

- Low air leakage rate of 4.1m3/HR/m2

at 50 pascals pressure.

- Suitable for buildings up to 86% Rh due to the superior vapour resistance affordedby the factory applied gasket system.

- 60 year durability (BBA assessment).

- Provides a tertiary barrier in the event of a failure of the external roof covering.

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0202020210

Tactray 90

Structural Liner Tray - Load / Span Tables - Deflection L/300

i Construction details in both CAD and PDF format are available from Britmet Tileform upon request.

Working Load UDL (kN/m2) - Gravity

Working Load UDL (kN/m2) - Uplift


Tables calculated andassessed by the SCI

to Eurocode-EN1993-1-2:2006

Deflection L/300: consider when Tactray 90 is supporting slates and tiles

Deflection L/300: consider when Tactray 90 is supporting slates and tiles

Please note:Load factor (working load

to ultimate) = 1.5

Tables indicate total load carryingcapacity of tray: kN/m2

Tables do not include self weightof trays

Tray bearing: minimum 65mm

Thickness Weightmm Kg/m2

0.75 8.831.00 11.781.25 14.721.50 17.35

Load/Span tables for Tactray 90 perforated

available from BritmetTileform upon request

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02020212

Tactray 90

Typical sections - non-perforated tray

Section through standard system - U value 0.25W/m2/K

1. Roof finish such as slates, tiles or profiled metal tiled sheets. 2. Slate/Tile battens. 3. 25mm Air gap. 4. 50 x 25mm Secondary counterbattens fixedat 600mm cr/s. 5. Breather membrane < 0.25 MNs/g. 6. 50 x 50 Counterbattens fixed at 600mm cr/s. 7. 140mm Tacmat plus insulation (lambda0.037 W/mK.) 8. Tactray 90 - 0.75 / 1.00 / 1.25 / 1.50mm gauge. 9. Side flange stitcher screws @ 600 mm cr/s. 10. Factory fitted vapour seal. 11.Main fasteners.


1. Roof finish such as slates, tiles or profiled metal tiled sheets. 2. Slate/Tile battens. 3. 25mm Air gap. 4. 50 x 25mm Secondary counterbattens fixedat 600mm cr/s. 5. Breather membrane < 0.25 MNs/g. 6. 50 x 75 Overall depth counterbattens (50+25mm) fixed at 600mm cr/s. 7. 180mm thkinsulation, compressed to 165mm (lambda 0.037 W/mK.) 8. Tactray 90 - 0.75 / 1.00 / 1.25 / 1.50mm gauge. 9. Side flange stitcher screws @600 mm cr/s. 10. Factory fitted vapour seal. 11. Main fasteners.

i • Construction systems for U values ranging from 0.25 W/m2K to 0.10 W/m2K are available. • Construction details in both CAD and PDF format are available from Britmet Tileform upon request.

04040413

Typical sections - non-perforated tray


1. Roof finish such as slates, tiled or profiled metal tiled sheets. 2. Slate/Tile battens. 3. 25mm Air gap. 4. 50 x 25mm Secondary counterbattens fixedat 600mm cr/s. 5. Breather membrane < 0.25 MNs/g. 6. 50 x 100 Overall depth counterbattens (50+50mm) fixed at 600mm cr/s. 7. 200mm thkinsulation,(or 2x100mm) compressed to 190mm (lambda 0.037 W/mK.) 8. Tactray 90 - 0.75 / 1.00 / 1.25 / 1.50mm gauge. 9. Side flange stitcherscrews @ 600 mm cr/s. 10. Factory fitted vapour seal. 11. Main fasteners.

Section through system - U value 0.16W/m2/K

1. Roof finish such as slates, tiles or profiled metal tiled sheets. 2. Slate/Tile battens. 3. 50mm Air gap. 4. 50 x 50mm Secondary counterbattens fixedat 600mm cr/s. 5. Breather membrane < 0.25 MNs/g. 6. 50mm thk tissue faced PIR boards, (lambda 0.022 W/mK). 7. 50 x 50mm Counterbattensfixed at 600 cr/s. 8. 140mm Tacmat plus insulation, (lambda 0.037 W/mK.). 9. Tactray 90 - 0.75 / 1.00 / 1.25 / 1.50mm gauge. 10. Side flangestitcher screws @ 600mm cr/s. 11. Factory fitted vapour seal. 12. Main fasteners.


02020214

Tactray 90

Typical sections - perforated tray (acoustic)

Section through standard perforated system - U value 0.25W/m2/K

1. Roof finish such as slates, tiles or profiled metal tiled sheets. 2. Slate/Tile battens. 3. 25mm Air gap. 4. 50 x 25 Secondary counterbattens fixed at600mm cr/s. 5. Breather membrane < 0.25MNs/g. 6. 50 x 50mm Counterbattens fixed at 600mm cr/s. 7. 120mm thk insulation, compressed110mm. (lambda 0.037 W/mK). 8. Vapour control layer (VCL). 9. 30mm RW3 insulation board (black tissue faced). 10. Perforated Tactray 90 - 1.00 / 1.25 / 1.50mm gauge. 11. Side flange stitcher screws @ 600mm cr/s. 12. Main fasteners.

Section through perforated system - U value 0.20W/m2/K

1. Roof finish such as slates, tiles or profiled metal tiled sheets. 2. Slate/Tile battens. 3. 25mm Air gap. 4. 50 x 25 Secondary counterbattens fixed at600mm cr/s. 5. Breather membrane < 0.25MNs/g. 6. 50 x 75mm Overall depth counterbattens (50+25) fixed at 600mm cr/s. 7. 140mm thkTacmat plus insulation, compressed 135mm. (lambda 0.037 W/mK). 8. Vapour control layer (VCL). 9. 30mm RW3 insulation board (black tissuefaced). 10. Perforated Tactray 90 - 1.00 / 1.25 / 1.50mm gauge. 11. Side flange stitcher screws @ 600mm cr/s. 12. Main fasteners.


04040415

Typical sections - perforated tray (acoustic)

Section through standard perforated system - U value 0.18W/m2/K

1. Roof finish such as slates, tiles or profiled metal tiled sheets. 2. Slate/Tile battens. 3. 25mm Air gap. 4. 50 x 25 Secondary counterbattens fixed at600mm cr/s. 5. Breather membrane < 0.25MNs/g. 6. 50 x 100mm Overall depth counterbattens (50+50) fixed at 600mm cr/s. 7. 160mm thkinsulation, (lambda 0.037 W/mK). 8. Vapour control layer (VCL). 9. 30mm RW3 insulation board (black tissue faced). 10. Perforated Tactray 90 - 1.00 / 1.25 / 1.50mm gauge. 11. Side flange stitcher screws @ 600mm cr/s. 12. Main fasteners.

Section through perforated system - U value 0.16W/m2/K

1. Roof finish such as slates, tiles or profiled metal tiled sheets. 2. Slate/Tile battens. 3. 50mm Air gap. 4. 50 x 50 Secondary counterbattens fixed at600mm cr/s. 5. Breather membrane < 0.25MNs/g. 6. 50mm thk tissue faced PIR boards, (lambda 0.022 W/mK). 7. 50 x 50mm Counterbattensfixed at 600mm cr/s. 8. 120mm thk insulation, compressed to 110mm, (lambda 0.037 W/mK). 9. Vapour control layer (VCL). 10. 30mm RW3insulation board (black tissue faced). 11. Perforated Tactray 90 - 1.00 / 1.25 / 1.50mm gauge. 12. Side flange stitcher screws @ 600mm cr/s. 13.Main fasteners.


0202020216

Tactray 90

Typical construction details for ‘U’ value 0.18w/m2K

Ridge detail

Soffit eaves detail


For larger overhang see page 22

0404040417

Hip detail Valley hip detail

Verge detail (soffited) Compartment wall detail (0.25W/m2/K U-value shown)


For larger overhang see page 22

020202020218

Tactray 90

Recommended fixings

FixingsThe fixings listed in Table 4 are recommended for use byBritmet Tileform as part of the product guarantee and willcomply with BBA certification.

Eave and verge overhangWhere the specifier requires a large eave and verge overhanga structural ‘Z’ purlin support can be incorporated to provideadditional strength and stability. The size and gauge of ‘Z’purlins are required to be calculated by a suitable structuralengineer, Britmet Tileform can provide assistance with thiscalculation. Please contact us for details.

ServicesFor lightweight services, such as fire sprinklers, a structuralbracket can be incorporated into Tactray 90 to assist insupporting the load. For more details please contactBritmet Tileform.

Table 4: Recommended fixings

Support section Britmet Tileform Code: Standard spacing

Tactray 90 to cold-rolled purlins/stitchers TUKT15GB16 3no on intermediate purlins5no on ridges, eaves, hip

and valley purlins. Side lap stitching of Tactray 90 at 600mm (max) cr/s

Tactray 90 to hot-rolled purlins <12.5mm TUKT24GB16 3no on intermediate purlins5no on ridges, eaves, hip

and valley purlins

Tactray 90 to hot-rolled purlins >12.5mm TUKDH56.3X43GB16 3no on intermediate purlins5no on ridges, eaves, hip

and valley purlins

Tactray 90 to timber† purlins/plates TUKT21GB16 5no on all purlins

Counterbattens* (tray thickness 0.75mm) TUKWDLS85RIB 600mm centres

*For fixing the counterbattens, use countersunk head self-drilling screws. †Minimum timber depth 50mm.

040404040419

Installation procedure

InstallationTactray 90 must be fixed with the non-tabbedunderlapping leg facing the direction of laying, using the following procedure:

1. Establish a setting-out line and apply the low density profile filler or mastic to the supporting steelwork at ridge and eaves. Fix the first full length of Tactray 90, using a minimum of three fixings at intermediatepurlins and five at ridge/eaves/hips/valleys.

CAUTION: When softwood timber purlins are used it is advisable to use five fixings on each purlin to allow for the various quality of commercially available softwood.

2. Lift the next length into position and tightly butt it against the first sheet, ensuring that the underlapping sheet is securely located on the tab provided. Mole ‘C’ clamps or similar should be used at eaves, ridge and intermediate purlin positions in order to clamp together the lengths of Tactray 90. This will ensure that there is no slippage prior to fixing, and assist close alignment of the ribs. If possible, joints should coincide with a main rafter so that they are not

visible from below. This is especially important where the brilliant white internal finish has been specified as a ceiling soffit.

NOTE: It is important to ensure tight buttingof the pans, since failure to do so may result in unsightly wide gaps, which cannot be subsequently rectified and may affect theintegrity of the vapour control layer.

3.Counterbattens are laid over the upstands.These should be a minimum of 50mm x 50mm, be true and relatively knot-free. The fixing centres are as specified by the structural engineer, but should not exceed 600mm. A list of recommended fixing screws is given in this brochure.

4. The TacMat insulating quilt is applied, fittingsnugly into the pan, with sufficient friction tohold it in place on most roof pitches. For added security, self-adhesive insulation pins may be used to minimise the possibility of slumping. These pins should be fixed at 3.0m centres, and the length of spike remaining above the spire clip cut off for safety.

CAUTION: Insulation must only be installed immediately prior to the fixing of the underlay felt and, once unrolled, must be protected from rainfall.

With the insulation, felt and battens in place, the normal procedure of slating/ tiling can take place.

Recommended contractorBritmet Tileform recommends that a roofing contractor fully experienced in installingstructural metal tray systems should beemployed. A list of recommendedcontractors is available on request.

> Structural support system for roofing An ideal structural tray to support a wide range of roofing systems including secret-fixstanding seam, lead, zinc, copper, green roofs and single ply membranes.

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Tactray 90 is an idealstructural tray to support awide range of roofingsystems such as secret-fixstanding seam, lead, zinc,copper, green roofs andsingle ply membranes.

Key benefits

• Reduces the need for roof purlins

• Perforated option tocontribute towards acousticsolutions

• Available with standardwhite polyester finish - other colours and coatingsavailable on request

• Factory fitted gasket - low air leakage rate of4.1m3/Hr/m2 BBA tested

• Working with structuralengineers, Tactray 90 canprovide lateral and stressedskin or diaphragm action toroof structure

• Provides a working platform

• Choice of insulation optionsto deliver a range of thermalperformances

The flexible option

Tactray 90

0202020202020222

Tactray 90

Tactray 90 can normally cantilever 750mm withoutstiffening. Beyond this dimension steel zed or top hatsections can be incorporated within the depth of Tactray 90.This solution can provide extended overhangs to eaves andverge details.

Tactray 90, structural tray linerideal for supporting a range ofroofing systems:

Tactray 90, the ideal solution to cantilevers and overhangs

Single plymembrane

roofs

Zinc / copper lead roofs

Green roofs

Standing seam roofs

For further information and technical support on the use of Tactray 90 for building applications please contact Britmet Tileform.

Single ply membrane roofs

Green roofs

Zinc/Copper strip roofs

Standing seam curved roofs

0404040404040423

Jablite Premium Tactray 90insulation systemAn innovative solutionJablite Premium is an innovative low lambda expanded polystyrene (EPS) insulationmaterial that has the capacity to enhance abuilding’s thermal performance by up to 20%.

A relatively new innovation in EPS insulation,Jablite Premium is becoming widely used inthe walls and roofs of domestic, public sectorand commercial buildings.

Instantly recognisable by its distinctive greyboard with orange flecks, it providesreassurances to architects, specifiers andcontractors that the material used on site isthe same as the one specified and crucially,that the resulting performance matches theapproved design intent.

• Easy to handle - lightweight and easy to handle and cut on site.

• Permanent - Jablite Premium is rot proofand durable and will remain effective forthe life of the building.

• Rapid construction - no specialist trades or equipment are required.

• Versatile - Jablite Premium can be used in the majority of applications for walls and roofs.

• Environment - Expanded polystyrene hasbeen awarded an A+ rating by the BRE’sGreen Guide to Specification. This independent assessment looks at thelife-cycle of materials as a whole fromcradle-to-grave and ranks themaccordingly. EPS has scored the highestpossible rating when compared with otherinsulation materials. It has a zero ODP(ozone depletion potential) and a very low GWP (global warming potential).

• Recyclable - Jablite Premium is fullyrecyclable and is non-toxic and inert.

• Type - Jablite Premium is supplied as EPS 70 (walls) and 100 (roofs) as defined in BS EN 13163 - Reaction to Fire Class E,containing a flame-retardant additive.

• Jablite Premium is manufactured to BS EN ISO 9001 (2000) QualityManagement Systems requirements.

• Thermal conductivity (k value) 0.030W/mK.

• Jablite Premium wall gradeCompressive strength 70kPa @10% compression.Compressive strength 20kPa @1% compression.

• Jablite Premium roof gradeCompressive strength 100kPa @10% compression.Compressive strength 45kPa @1% compression.

0202020224

Tactray 90








Deflection L/200: consider when Tactray 90 is supporting roofing

Deflection L/200: consider when Tactray 90 is supporting roofing


to ultimate) = 1.5





0.75 8.831.00 11.781.25 14.721.50 17.35



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0202020202020226

> Structural support system for wall cladding The perfect structural tray, designed to provide support for metal cladding,rainscreen systems, vertical tiling and timber boarding and shingles.

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Tactray 90 providessupport for a range ofexternal cladding systemssuch as metal cladding,rainscreen systems,vertical tiling, timberboarding and shingles.

Key benefits

• Reduces need for cladding rails

• Clean lines internally - no collection of dust anddebris on cladding rails

• Perforated option tocontribute towards acoustic solutions

• Available with standard white polyester finish –others colours and coatingsavailable on request

• Factory fitted gasket - low air leakage rate of4.1m3/Hr/m2 BBA tested

• Choice on insulation optionsto deliver range of thermalperformances

• Tactray 90 can span eitherhorizontally or vertically

0404040404040427

The flexible option

Tactray 90

0202020228

Tactray 90








Deflection L/150: consider when Tactray 90 is supporting wall cladding

Deflection L/150: consider when Tactray 90 is supporting wall cladding


to ultimate) = 1.5





0.75 8.831.00 11.781.25 14.721.50 17.35



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> Structural ceiling systemA structural tray specifically designed to encapsulate and support failing and ageing CLASP, SEAC orsimilar modular roofing systems. Trays provide a ready finished ceiling, perforated for acoustic solutions.

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Structural ceiling traysystem to support failed Clasps& SEAC asbestos decks andceiling systems on ageingschools. Tell tale signs beingwater ponding and crackedand damaged asbestos decking.

Key benefits

• Provides structural support to existing roof system in theevent of structural failure

• With minimum disturbanceTactray 90 covers and hidesugly pipework, cables anddamaged ceilings

• Encapsulates and containsasbestos particles withinexisting roof system

• New low maintenance ceilingfinish in bright white finishoffering clean lines withreflective index of 79%

• Tactray 90 perforatedoffering enhanced acousticsolutions

• Choice of insulations toprovide range of enhancedthermal U-value requirements

• Best economic solution

• Keeping the classroom warmin winter and cool insummer means that theTactray 90 ceiling system hasthe potential to create ‘MoreEducation Perfect Days’ forthe occupants of the building

The flexible option

Tactray 90

Cracked decking indicatesstructural failure

Tactray can cover and hideugly pipe services and cables

Water ponding can indicatepotential problems

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Roof support and acoustic ceiling system

Tactray 90

The issueAcross the UK there are quite simply hundredsof schools that have been originally designedwith an asbestos deck sandwiched between theceiling and the roof covering.

Some 50 years later the roof decks and ceilingsare starting to show signs of distortion, pondingand possible risk of collapse.

The challengeTo provide an acoustic ceiling and structural roofsupport system to extend the life of Post WarSystem Built Schools and similar propertiesBritmet Tileform were tasked with designing andsupplying a solution to a prolific problem onseveral schools in the Hertfordshire area.

A test school site was available to BritmetTileform in which we could trial the system and redesign as necessary.

The modelThe schools in question were all of a similardesign and their construction based on typicalHills / SEAC / Clasp systems which included anasbestos deck system.

Typically the main roof supports, usually lattice,beams followed virtually the same design layoutand were modular in their spacings at 8’3”(2.51m) centres. Tactray 90 (perforated) spansbetween the existing lattice beams. The trays arefixed in position with special purpose madeangles and cleats, which are securely fixed tothe existing lattice beams.

The ResultTactray 90 can offer a retro fit system that can combine and offer structural support to the existing roof plusencapsulate the asbestos and at the same time provide a new acoustic ceiling.

Tactray 90. A budget saving method of extending the life of your school.

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Installation, in brief

A structurally engineeredangle is securely attachedto the existing latticebeams. This forms theprimary support for asecond angle to follow.

40mm solid insulationboard is glued/fixed toexisting ceiling, to improvesound and thermalperformance. A secondaryangle/cleat is securelyattached to the first angle.This second angle formsthe mainbearing to supportthe Tactray.

Tacmat insulation andRockwool RW3 acousticboard is pre-installedwithin the Tactray pan. The whole assembly isoffered up and the tray is securely attached to the second angle.Combinations of Tacmatand acoustic board areavailable to providethermal and acousticrequirements.

The Tactray 90 ceilingsystem continues to beinstalled. Consideration forcabling, pipe work andfuture services has beentaken into account. Thesecan be accommodated byusing integral duct trays,which can be accessedquickly for ongoingmaintenance.

The duct trays can beinstalled as often asrequired. They can bebespoke for each project ora modular layout could beestablished. Removablecolour coated cover platesare provided to matchTactray 90.

The remaining exposedlattice beams can beencased with purposemade box flashings, colourcoated to match Tactray.Perimeter flashing or edgetrims can also be provided.

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Tactray 90

Transport, handling & storage

COSHHProduct data sheets are available covering relevant Health & Safety information.

CDM RegulationsTactray 90 should be specified and handled in accordance with the requirements of theConstruction Design and Management (CDM)Regulations.

Site preparationIt is advisable to ensure that sufficient room isavailable for on-site storage (including bulkyinsulation), and that there is sufficient roomfor the turning and unloading of vehicles.

DeliveryAll deliveries are by road unless otherwisespecified. Off-loading is the responsibility ofthe client.

StorageIf materials are to be left on site for any lengthof time it is important that the products are

stored in their original packing, under coverand in a dry, well-ventilated position. Thepacks should be laid on even ground, havinga slight incline to ensure rainwater run-off.When covering materials, please ensure thatadequate free ventilation has been allowed toprevent condensation. All materials, includinginsulation, fixings, fillers etc., should be keptunder appropriate conditions away from vehicle access roads and building activities, as contamination by lime or cement maycause staining.

LiftingPacks are supplied with timber collars at twometre centres. A crane beam is available forhire if site access and conditions demand it.Full packs weigh 1-1.5 tons (max. weight 2tons), and should always be positioned over arafter to prevent damage to, or collapse of,the purlin system. Remember also to determine that the non-tabbed leg is in thedirection of lay before lifting the Tactray 90onto the roof.

LoadsLengths up to 13.5m are supplied stacked,with two pieces side-by-side, and up to 20pieces in a pack. Orders for packs containingless than 20 pieces may incur a surcharge.Around 1000m2 of Tactray 90 may be loadedonto a typical 12m trailer, assuming alllengths are equal and fill the trailer bed.

Cutting of sheetsAll site-cut egdes should be treated with‘Galvafroid’ or similar cold-galvanising paintaccording to the manufacturers’ instructions.

Tactray 90 can be cut on-site with a nibbler or reciprocating saw and is easy to drill,although care should be taken to preventswarf or cut edges posing an accident threat.

CAUTION. On no account should disccutters be used to cut Tactray 90.

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Performance

AuthorityTactray 90 manufacture complies with ISO 9002 (BS 5750) and the finished roofconstruction is BBA certified No 95/3192.

PatentsTactray 90 is patented under patent number2185501 when used in lieu of timber raftersunder felt and tiles. It is not patented whenused horizontally in lieu of cladding rails, or under profiled steel roofing.

CompositionThe trays are roll-formed from either 0.75mmor 1.0mm Fe E 350 G grade steel, galvanisedwith a thickness of coating to Z275 to BS EN10147:1992.

AppearanceGalvanised: minimum spangled, dull metallicfinish for hidden or purely functional use.Painted: Tactray 90 is also available coatedwith a brilliant white 25 micron polyester paintapplied over the primer and galvanising, supplied with a strippable protective film.

CondensationWhen correctly laid and sealed, Tactray 90meets the requirements of BS 5250:1989and approved document F2. Providing theinternal humidity does not exceed the limitsgiven, there will be no significantaccumulation of condensation on the internalsurface. The maximum internal relativehumidity is 86% for an internal temperatureof 20oC and an external temperature of 5oC.

Thermal movementWhen correctly installed using TacMat quilt,and with the insulation provided by the airspaces, slates, tiles, lightweight roofing systemor standing seam, the Tactray 90 should be atambient room temperature. At this temperaturethermal expansion does not present a problem.

Light & optical performanceThe brilliant white inner face of Tactray 90 has a reflectivity index of 79%. A lighting consultant can advise on maximising this high performance.

Fire protectionTactray 90 has been approved to give the following performance:

- Coated steel sheeting, tested to BS 476:Part 5,ignitability test was graded ‘P’ - not easily ignitable.

- Surface spread of flame tests to BS 476: Part 7:1971, gave an index of performance within the requirements of a Class O surface as defined by the current Building Regulations and the Building Standards (Scotland) Regulations.

The material used in the manufacture ofTactray 90 has a Class 1 surface spread offlame to BS476:Part 4 and Class O Fire ratingin accordance with the Building Regulations.Tactray 90 meets the Fire Officers Committee(FOC) rules for use in Class 2 buildings.

Acoustic performanceA perforated version is offered for enhancedacoustic performance. Please consult BritmetTileform’s technical department for further details.

Environmental performanceUnder normal atmospheric conditions, the steeland galvanised finish of Tactray 90 remainsunaffected. Tactray 90 is impervious to insects,birds, vermin, fungal and biological attack. Iflocalised conditions are such that Tactray 90may be exposed to specific liquid, gas or solidchemical pollutants, Britmet Tileform’s technicaldepartment should be consulted.

DurabilityWhen correctly installed by an approvedcontractor in accordance with our instructions,Tactray 90 would be expected to have aserviceable life in excess of sixty years. Thegalvanised coating would typically protect thesteel substrate for at least fifteen years andwhen the polyester finish is specified, theexpected period of protection offered by thecoating system would be over twenty-fiveyears. This anticipated performance would bereduced where the product is subject to highhumidity levels or where exposure to chemicalcontaminants or physical damage occurs.

Corrosion resistanceWhere a softwood timber treated with preservative is used, the preservative manufacturer should be consulted regardingpotential electrolytic corrosion of the galvanised tray or fasteners. The allowablemaximum moisture content of the timber is20%. Run-off water from lead or copper flashings should also be prevented from coming into contact with the galvanised surface of Tactray 90.

MaintenanceNo maintenance is required apart from occasional cleaning of the internal paintedsurface where required. Where a change ofcolour is required an approved proprietarypaint system should be used. Please contactBritmet Tileform’s technical department forfurther details.

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Tactray 90

Case Studies

National MaritimeMuseum. Falmouth,

Cornwall

Product.Tactray 90 - Tile Support.

Coating/Colour.Double Sided Granite/Black.

Architect.Long & Kentish. London.

Main Contractor.Tilbury Douglas Construction.

Roofing Contractor.ISCA Roofing. Exeter.

Bristol Royal Hospital For

Children. Bristol

Product.Tactray 90 - Mansard Tile Support

and Flat Membrane Roof.

Coating/Colour.Galvanised/Natural.

Architect.Whicheloe Macfarlane (MDP). Bristol.

Roofing Contractor.Mitie Roofing. Bristol.

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Case Studies

Cunningham HillJunior School, St

Albans, Hertfordshire

Product.Tactray 90 - Perforated

Structural Ceiling system.

Coating/Colour.Polyester/White.

Architect.Mouchel. Hertford.

Main Contractor.T & B Contractors.Wheathampstead.

Roofing Contractor.WM Cooper. Barnsley.

Apartments. PortMarine, Portishead,

Somerset


Coating/Colour.Galvanised/Natural.

Architect.BBA Architects. Bath.

Main Contractor.Crest Nicholson. Bristol.

Roofing Contractor.S & J Roofing Ltd. Bristol.

St Joseph’s R.C.School. Newport,

South Wales


Coating/Colour.Plain Galvanised & Polyester/White.

Architect.Boyes Rees Architects. Newport.

Main Contractor.E. Turner & Sons. Cardiff.

Roofing Contractor.Fersons Ltd. Bristol.

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Tactray 90

Case Studies

Car showroom.Bristol



Roofing Contractor.Severnside Roofing, Bristol.

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Case Studies

Clarks Village OutletShopping. Street,

Somerset



Architect.Lyons Sleeman Hoare.

Hook, Hampshire.

Main Contractor.Edgar Builders.

Somerton, Somerset.

Roofing Contractor.Sheppard Roofing.

Weston-Super-Mare.

Library & InformationCentre. Hungerford,

Berkshire

Product.Tactray 90 - Perforated

Supporting Single PlyMembrane Roof.

Coating/Colour.Polyester / White.

Architect.Edgington Spink & Hyne.

Datchet, Berkshire.

Main Contractor.Claude Fenton Construction.

Reading, Berkshire.

Roofing Contractor.Malone Roofing.

Newbury, Berkshire.

Britmet Tileform LtdSpital Farm OfficesThorpe MeadBanbury, Oxon OX16 4RZ

Tel: (01295) 250998 Fax: (01295) 271068Email: [email protected] our website: www.britmet.co.uk

Due to a policy of continual product development, Britmet Tileform Ltd reserves the right to alter any of the specificationsgiven in this publication without prior notice. The specification for any given application must be checked with BritmetTileform Ltd prior to manufacture. No responsibility for accuracy is accepted by Britmet Tileform Ltd.

Britmet Tileform is a leading British

manufacturer of innovative

lightweight roofing systems

For complete building envelope solutions

Lightweight Tile Effect Panels> Slate 2000> Plain Tile> Profile 49> Ultratile> Villatile

Lightweight Eaves to Ridge Tile Effect Sheets> Boldroll> Pantile 2000

Structural Trays> Tactray 90> Tac Ceilings> Tac Walls

Brit Power - Renewable Energy Products> Solar Panels

Associated Products> Guttering> Soffits & Fascias> Weatherboards> Breathable Membranes> Clear Tiles

Britmet Tileform

uniclass epic l352:p4142 october 2010 britmet tileform · tactray 90. the complete building...

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