Vapour Control Barrier Flat Roof

Vapour control layer for a cold roof.

Vapour control barrier flat roof. However the cross ventilation does not completely remove the moisture vapour in the ceiling void and a vapour control layer sealed at joints and penetrations is required under the insulation and over the plasterboard to provide a barrier against moisture vapour rising up from the room below. 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. Provided your vapour control layer is intact then there should not be any risk of condensation.

Vapour control layers vcl. A polythene vapour barrier limits the movement of air and water vapour through a membrane so a vapour control layer is air permeable or vapour permeable. 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. For all warm flat roofs a fully intact vapour barrier would be required on the room side under the insulation.

We provide a vapour control layer for flat roof installations as well as heavy duty vapour control layers for a warm flat roof. A vapour control layer or vcl on a warm flat roof sits between the roof decking and the insulation. The notion behind a vapour control layer is to install it on the room.