Warm Deck Roof Vapour Barrier

Exceptions to this idea include roofs over indoor swimming pools or other high humidity producing activities and over new concrete roof decks to prevent the moisture in the concrete from drying into the roof system.

Warm deck roof vapour barrier.

Warm deck flat roof vapour barrier. Vapour barrier on warm deck roof. If this has not been done then we would recommend that you install one underneath the joists before the plasterboard goes up. The insulation can be adhered mechanically fixed or loose laid.

Discussion in roofing and guttering started by sam85 21 jul 2017. Including flat roof vapour barrier for extra secure roofing solutions. The insulation is immediately below the waterproofing layer. When we use a vapor retarder in a roof system it will also act as an air barrier as long as it is sealed at all perimeters and.

Whether you re repairing a flat roof or laying a new one from scratch you ll find all the materials you need here. 22 jan 2010 messages. Discussion in builders talk started by fatpiggy12345 sep 24 2020 at 9 39 pm. A warm flat roof or a built up roof bur is one where all the insulation is above the joists deck making them part of the warm fabric of the building.

Including fibreglass roof kits torch on felt and liquid rubber products everything you need for flat roofing is in one place. Our builders have put a vapour barrier on the upper side of the insulation on a warm deck roof. I am having an extension built and my builder is constructing the flat warm deck roof in the following way. The vapour control layer is above the decking but below the insulation.

To use epdm for a warm deck flat roof construction solid closed cell roof insulation such as kingspan or celotex should be placed on top of the roof deck rather than in between the rafters. This could be a 1000 gauge min polythene sheet.