Vapour Control Layer Pitched Roof

Access hatches to cold roof voids should have.

Vapour control layer pitched roof.

The idea behind a vapour control layer is to install it on the room side of the insulation so it blocks the passage of warm moist air rising into the pitched roof structure. With traditional cold pitched roof construction more insulation often means more interstitial and surface condensation too a danger that is aggravated by precipitation and wind. The job of a vapour control layer or vcl reduces the water vapour transfer through any building and reduces the risk of condensation forming. Where the ceiling below a cold pitched roof includes a vapour control layer the design should ensure adequate ventilation is provided to the habitable areas to prevent condensation problems in the home.

Tyvek and airguard membranes minimise interstitial and surface condensation in cold pitched roof construction while helping to ensure optimal energy efficiency. We re proud to bring you a range of choice from novia s excellent dual use foil tape to powerlon s ultrablock air barrier and plenty more besides. Reduce heat loss and boost energy efficiency with market leading vapour control layers vapour barrier membrane and vapour control barriers. Vapour control layers are positioned to the inside of the insulation in order to minimise the amount of warm moist air entering the construction.

Breather membranes are positioned to the outside of the insulation acting as a weather barrier while still allowing moisture particles to escape from the inside. A vapour control layer helps you shield your building from the consequences of condensation. A vapour control layer or vcl on a warm flat roof sits between the roof decking and the insulation. You ll find pitched roofing products here.

An airguard vapour control layer can significantly reduce heat loss and increase energy efficiency. Condensation is formed when warm moist air rises and condenses into a liquid on contact with the colder surfaces above the insulation. An air leakage rate not more than 1 m3 h at a pressure of 2 pa when tested to bs en 13141 1 or. Condensation is generated when warm moist air rises and condenses into a liquid on contact with the cooler areas above the insulation.

This is done by installing it on the inner side of the insulation for example in a pitched roof this would sit beneath the layer of insulation that has been installed between the rafters. Browse the links below to discover fantastic products such as ultrablock 200 thermo reflective vapour control layer monarflex monarfilament 250 vb and much more.