Vapour Barrier Flat Warm Roof

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.

Vapour barrier flat warm roof.

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. Because of this the vcl always sits at the warm side of the. Including flat roof vapour barrier for extra secure roofing solutions. 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.

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. 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 video will demonstrate how to install a cure it grp waterproofing system in a warm roof build up.

A vapour barrier will then need to be installed to reduce condensation in the roof structure. The notion behind a vapour control layer is to install it on the room. It s the first line of defence against high vapour pressure air entering the roof structure and causing interstitial condensation. Including fibreglass roof kits torch on felt and liquid rubber products everything you need for flat roofing is in one place.

There is no requirement for any air gaps. If this is a habitable room beneath the roof then you should be constructing a warm roof as per building regulations c l.