Vapour Barrier Flat Warm Roof

Because of this the vcl always sits at the warm side of the.

Vapour barrier flat warm roof.

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. 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. The notion behind a vapour control layer is to install it on the room.

Including fibreglass roof kits torch on felt and liquid rubber products everything you need for flat roofing is in one place. Provided your vapour control layer is intact then there should not be any risk of condensation. If this is a habitable room beneath the roof then you should be constructing a warm roof as per building regulations c l. 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.

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. There is no requirement for any air gaps. This video will demonstrate how to install a cure it grp waterproofing system in a warm roof build up. Ideally you need to ventilate the roof and have a 50mm air gap above your.

Be it a cold or warm roof construction the primary function of a vcl is to keep warm moist air from inside the building inside the building. Including flat roof vapour barrier for extra secure roofing solutions.