Flat Roof Vapour Control Barrier

A vapour control layer is designed to catch this vapour preventing it from condensing on the insulation or elsewhere in the loft space or attic.

Flat roof vapour control barrier.

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. At roofing superstore our choice of flat roof materials includes everything you need to create a long lasting weather proof flat roof that performs and looks good too. Vapour control layers vcl. Comparatively a vapour barrier prevents any movement of vapour or air occurring through the building instead of just limiting it to a controlled level.

Its not cheap purchasing it by the role and by the pallet load is cheaper but is a considerable layout. 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 flat roof vapour barrier such as iko s mvp modified vapour protector offers appropriate moisture protection. Temporarily waterproofs the roof can stay uncovered for up to 3 months.

Including fibreglass roof kits torch on felt and liquid rubber products everything you need for flat roofing is in one place. Vapour resistance of 2000 mns g. The notion behind a vapour control layer is to install it on the room. A vapour control layer or vcl on a warm flat roof sits between the roof decking and the insulation.

There is no requirement for any air gaps. We provide a vapour control layer for flat roof installations as well as heavy duty vapour control layers for a warm flat roof. Vapour control layer for a cold roof. Why is it the best vapour barrier for flat roofs.

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. For all warm flat roofs a fully intact vapour barrier would be required on the room side under the insulation. Self healing if punctured by fixings.