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Tyvek® and AirGuard® membranes are BBA-approved for cold pitched roof construction. They minimise interstitial and surface condensation by allowing moisture to permeate up into the batten space, then out into the atmosphere.
DuPont™ Tyvek® breather membranes make an ideal secondary water barrier. Unlike building paper, they protect walls effectively from external moisture and condensation, while helping to improve thermal performance too.