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Roofshield Air Permeable Breather Membrane by Daltex - 50m x 1m Roll

Code:
DTX

Roofshield is a unique, three - layer, nonwoven, spunbonded, polypropylene breather membrane with a patented melt - blown core. It is intended for use as a pitched roof underlay (breathable roofing felt) and is fixed beneath tiles and slates. Roofshield provides a secondary b... Read More

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Description

Roofshield is a unique, three - layer, nonwoven, spunbonded, polypropylene breather membrane with a patented melt - blown core. It is intended for use as a pitched roof underlay (breathable roofing felt) and is fixed beneath tiles and slates.

Roofshield provides a secondary barrier to the ingress of rain, wind and snow. It has a low vapour resistance and is air - permeable; additionally, it eliminates the incidence of interstitial condensation in pitched roofs.

The product provides the most cost - effective solution to controlling interstitial condensation in a pitched roof.

Properties

Length: 50m.
Width: 1m.
Roll size: 50m2.
Thickness: 0.6mm.
Weight: 185 gsm.
Reaction to fire: class d.
Vapour resistance: 0.065 MNsg to EN 12572.
Air permeability: 34.4 m3/m2.h.50Pa to EN 12114.
Certification: BBA certified and CE marked.

Application

Non-ventilated warm roof construction.

A “warm roof ” is a roof construction where the insulation layer is placed either over, or between the rafters, and follows the pitch of the roof from eaves to ridge. This configuration keeps the roof structure within the heated envelope of the building, and allows spaces within the roof to be used as habitable spaces, or easily converted at a later date. Warm roofs are typically insulated using rigid boards, and the underlay may be installed either fully supported, or draped, depending on the location of the insulation. Full details of warm roof design and site practice are given in BBA certificate No.96/3220.

Non-ventilated cold roof construction.

In a cold pitched roof construction, the insulation is placed horizontally at ceiling level, running from eaves to eaves, leaving the loft and roof structure above the heated envelope of the building. Traditionally, this cold loft space would require ventilation, but this can be impractical for some roof configurations, and avoiding such ventilation has long been desirable.

Long term studies carried out by the BRE between 1997 and 2006 concluded that the moisture content found in non-ventilated Roofshield roofs were comparable with the moisture content found in a conventionally ventilated roof space, and following this research Roofshield has been certified for this use since 1999. The relevant BBA certificate for cold pitched roof and room-in-roof constructions is 99/3648.

Features

• Water resistant.
• Low vapour resistance.
• Air permeable.
• No vapour control layer required.
• UV resistant.
• Hydrophobically treated.
• Eliminates low & high level ventilation.

Dimensions

Length 50m Width 1000mm

Details

Permeability Air Open Roll Size 50m2

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Roofshield Air Permeable Breather Membrane by Daltex - 50m x 1m Roll

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