Vapour Barrier Flat Warm Roof

There is no requirement for any air gaps.

Vapour barrier flat warm roof.

It s the first line of defence against high vapour pressure air entering the roof structure and causing interstitial condensation. If it is not a habitable space or as per the old design for flat cold roofs then you would use foil backed plasterboard which acts as a vb. Including fibreglass roof kits torch on felt and liquid rubber products everything you need for flat roofing is in one place. This video will demonstrate how to install a cure it grp waterproofing system in a warm roof build up.

The notion behind a vapour control layer is to install it on the room. A vapour control layer helps you shield your building from the consequences of condensation condensation is generated when warm moist air rises and condenses into a liquid on contact with the cooler areas above the insulation. Provided your vapour control layer is intact then there should not be any risk of condensation. Including flat roof vapour barrier for extra secure roofing solutions.

Ideally you need to ventilate the roof and have a 50mm air gap above your. 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. Whether you re repairing a flat roof or laying a new one from scratch you ll find all the materials you need here. For all warm flat roofs a fully intact vapour barrier would be required on the room side under the insulation.

A vapour control layer or vcl on a warm flat roof sits between the roof decking and the insulation. A vapour barrier will then need to be installed to reduce condensation in the roof structure.