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Manufacturer's Contact Details

Du Pont Tyvek, Unit 29, Hither Green Estate, Clevedon,
North Somerset, BS21 6XU
Tel.: +44 (0) 1275 879 770 Fax: +44 (0) 1275 879 033
Email: Click here - Internet: www.construction.tyvek.com

This page was last updated: Wednesday, February 1, 2012

 

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Du Pont Tyvek Supro breather membrane for roofs, walls and floors

Tyvek Supro from as little as £1.55m² - £77.10 per roll

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Insulation Online Limited

27 Massetts Road, Horley,Surrey, RH6 7DQ

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Du Pont Tyvek® Supro

The market leading vapour permeable roofing underlay: an extremely water-resistant, airtight and vapour open membrane.

When considering your breather membrane, ask these 3 simple questions:

1 Do I need to vent my roofX

No, Tyvek® Supro does not need any soffit, tile or ridge ventilation, therefore saving time and money

2 Do I need an airspace between the insulation and breather membraneX

Because the Tyvek® Supro membrane breathes, it does not need an airspace.

3 Does the product have the necessary approvalsX

Tyvek® Supro is fully BBA and IAB approved, suitable for use in all types of pitched roofs.

 

Product Benefits

• Extremely water-resistant
  

• Airtight
  

• Vapour-permeable
  

• Providing superior air and moisture management for commercial and residential buildings
  

• Durable (see independent test results at www.tyvek.co.uk)
  

• For all supported and unsupported pitched roof applications - warm, hybrid and cold roofs
  

• For Scottish sarking board systems
  

• For low pitched metal roofs, wall and floor applications

 

More energy efficiency / less roof ventilation

Tyvek® Supro is an extremely water resistant, airtight and vapour permeable membrane providing superior air and 0moisture management for commercial and residential buildings.

Tyvek® Supro is a multi-purpose, durable and reinforced Tyvek® grade for use in all supported and unsupported pitched roof applications, including warm, hybrid and cold roofs.

Also suitable for Scottish sarking board systems and low pitched metal roofs as well as wall and floor applications.

 

Product Properties

Composition: Spunbonded polyethylene and polypropylene

Roll Size 1.5m x 50m; Weight 12kg; Coverage 67.5m2

Roll Size 1.5m x 50m; Weight 8.5kg; Coverage 42.5m2

UV exposure 4 months

Warranty 30 years

 

Description

Tyvek Supro is vapour permeable and manufactured by spinning strands of high-density polyethylene (PE-HD) and bonding them together with heat and pressure to form a flexible sheet.

Tyvek Supro is available with or without an integral adhesive tape (see Tyvek Supro Plus below).

The product has the nominal characteristics of ...

Thickness (mm) 0.45

Mass per unit area (gm–2) 145

Roll length (m) 50 - Roll width (m) 1.0, 1.5

Tensile strength (N per 50 mm) longitudinal >400 transverse >400

Elongation at break (%)(1) longitudinal 17 transverse 17

Colour white underside/ gray top side and red logo

 

General

Tyvek Supro Roof Tile Underlay must be installed and fixed in accordance with the BBA Certificate No. 08/4548

Installation can be carried out under all conditions normal to roofing work.

The product is installed with the printed side uppermost and lapped to shed water out and down the slope.

Overlaps must be provided with the minimum dimensions given in the table below

In closed eaves constructions, eaves guards should be used to protect the product from sunlight and direct water into the gutter. Tyvek Eaves Carrier is recommended by the manufacturer for this purpose.

Hips should be covered with a 600 mm wide strip of the product.

 

Weather-tightness

Tests indicate that the product will resist the passage of water, wind-blown snow and dust into the interior of a building, under all conditions to be found in a roof constructed in accordance with the relevant clauses of BS 5534 : 2003.

The product resists penetration of liquid water and consequently may be used as temporary waterproofing prior to the installation of slates or tiles. The period of such use should, however, be kept to a minimum.

Risk of condensation

For design purposes, the product’s water vapour resistance may be taken as not more than 0.25 MNsg–1 and for roofs designed in accordance with BS 5534 : 2003 or BS 5250 : 2002, Section 8.4, it may be regarded as a Type LR membrane.

In common with all roofs, care must be taken in the overall design and installation to minimise the risk of water vapour coming into contact with cold parts of the construction. Factors to be considered and minimise include, moisture diffusion through the ceiling, infiltration through unsealed openings/penetrations in the ceiling and services evaporating or venting moisture into cold spaces.

The risk of condensation is highest in new-build construction during the first heating period, where there is high moisture loading due to wet trades, such as in-situ cast concrete slabs or plaster.

The risk of condensation diminishes as the building naturally dries out. See BBA Information Bulletin No 1 — Roof Tile Underlays in Cold Roofs during the Drying-out Period. Ceiling and insulation horizontal (cold ventilated roof)

Roofs designed and constructed in accordance with BS 5250 : 2002 will adequately limit the risk of interstitial condensation. Ceiling and insulation inclined (warm roof)

For roofs with an insulated inclined ceiling, ventilation above or below the underlay will not be required provided that the passage of moisture by diffusion and by convection is controlled, eg, by a vapour control layer (eg TYVEK SD2) or a continuous envelope of insulation with a high vapour resistance. Ceiling and insulation partially inclined (warm roof and cold roof)

Where an insulated ceiling only spans part of the roofline, resulting cold roof spaces should be installed in accordance with Product Sheet 2 of this Certificate.

 

Wind loading

Project design wind speeds should be determined and wind uplift forces calculated, in accordance with BS 6399-2 : 1997.

The product, when fully supported, has adequate resistance to wind uplift forces. 7.3 For a cold ventilated system, wind loading on the underlay should be calculated in accordance with BS 5534 : 2003, Section 5.5.2.7. For acceptable wind loads with specific batten spacings for the draped product, using a 25 mm deep tiling batten (see section 16, Table for Physical properties — general).

 

Strength

The product will resist the loads associated with installation of the roof (See BBA Certificate Section 16, Table for Physical properties — directional).

 

Properties in relation to fire

The product will melt and shrink away from heat, but will burn in the presence of a naked flame. The product is classified in accordance with BS EN 13501-1 : 2007 as a Class E material.

When the product is used unsupported, there is a risk that fire can spread if it is accidentally ignited during maintenance works, eg by a roofer’s or plumber’s torch. As with all types of underlay, care should be taken during building and maintenance to avoid the material becoming ignited.

When the product is used in a fully supported situation, the reaction to fire will be determined by the support.

 

Maintenance

As the product is confined within a roof structure and has suitable durability maintenance is not required.

 

Durability

The product will be virtually unaffected by the normal conditions found in a roof space and will have a life comparable with that of traditional roof tile underlays, provided they are not exposed to sunlight for long periods (see section 12.4). Advice regarding exposure can be obtained from the Certificate holder.

 

Installation

Tyvek Supro Roof Tile Underlay must be installed and fixed in accordance with the Certificate holder’s instructions, provisions of this Certificate and the relevant recommendations of BS 5534 : 2003 and BS 8000-6 : 1990.

Installation can be carried out under all conditions normal to roofing work.

The product is installed with the printed side uppermost and lapped to shed water out and down the slope.

Overlaps must be provided with the minimum dimensions given in Table 1.

In closed eaves constructions, eaves guards should be used to protect the product from sunlight and direct water into the gutter.

Tyvek Eaves Carrier is recommended for this purpose.

Hips should be covered with a 600 mm wide strip of the product.

 

Procedure

Fully supported

The product may be used over sarking boards of softwood (cold ventilated roofs), and either with continuous insulation or insulation placed between the rafters (warm roofs).

The product is either secured to the support with counter battens at least 12 mm thick to create a drainage and vapour dispersal space between the product and the tiles or, when using timber sarking, the traditional Scottish practice with the tiles or slates fixed directly into the boards. This space should be ventilated in accordance with BS 5250 : 2002 when using tight fitting roof covering.

Counter battens, when used are fixed with corrosion-resistant staples or galvanized clout nails as appropriate. Tiling battens are secured to the counter battens and support fixings. Alternatively, the membrane may be installed draped over counter battens, with sufficient drape to allow drainage of liquid water under the tiling battens.

Care must be taken to minimise the risk of interstitial condensation as described in section 6.5 particularly for timber sarking which may be below the dew-point for extended periods during winter months.

 

Unsupported

The pro , ie draped between the rafters.

 

Repair

Damage to the product can be repaired easily prior to the installation of slates or tiles by replacing the damaged areas, by patching and sealing correctly. Care should be taken to ensure that the watertightness of the roof is maintained.

 

Finishing

Detailing of abutments, verges and hips must be in accordance with the Certificate holder’s instructions.

The tiling and slating must be carried out in accordance with the relevant clauses of BS 5534 : 2003, BS 8000-6 : 1990 and the tile/slate manufacturer’s instructions, especially when using tightly-jointed slates or tiles.

 

DuPont Tyvek Product Applications	Tyvek* Acrylic Tape	Tyvek* Metallised Tape	Tyvek" Double Sided Tape	Tyvek* Butyl Tape	DuPont Universal Sealant	Tyvek* UV Facade Tape	Dupont" Flex Wrap IMF
DuPont "Tyvek* roofing underlays
Tyvek*Supro/Plus	X		X	X	X		X
Tyvek*Metal	X		X	X	X		X
Tyvek*Enercor*Roof		X	X	X	X		X
DuPont"Tyvek*solutions for Timber Frame and wall constructions
Tyvek* Housewrap	X		X	X	X		X
Tyvek* UV Facade			X	X	X	X
Tyvek* Reflex		X	X	X	X		X
DuPont "Air Guard* air & vapour control layer (AVCL)
DuPont "Air Guard* Control	X		X	X			X
DuPont "AirGuard* Reflective		X	X	X	X		X
Materials
Masonry / concrete / render (smooth)	X	X	X	X	X	X	X
Brick / block / concrete (rough)				X	X		X
Plasterboard	X	X	X	X	X	X
Eaves Carrier			X	X	X		X
Window / doorframes	X	X	X	X	X	X	X
Metal surface	X	X	X	X	X	X	X
Timber (rough sawn)				X	X		X
Timber (planed)	X	X	X	X	X	X	X
Details
Pipe penetrations (plastic)	X	X				X	X
Pipe penetrations (metal)	X	X				X	X
Wiring / cable penetrations	X	X				X	X
Chimneys				X	X		X
Chimneys (making good corners)	X	X					X
A round electrical sockets	X		X	X	X
Other
Damage repair	X	X				X
Nail penetration*				X
Laps sealing	X	X	X		X	X

 

 

 

 

Contact manufacturer

Contact information at the top right of this page. Architects, Designers, Surveyors, et cetera should contact the manufacturers directly

Please note: Minimum order level of £500.00 (ex-VAT) and all deliveries come on 28 ton trucks (large curtain sided lorries).

The product information and specifications above are extracted from the manufacturer's published materials. Please download and fully review the manufacturer's information prior to purchase.