Vapour Control Barrier Flat Roof

The vcl also restricts the movement of warm moist air and improves building insulation.

Vapour control barrier flat roof.

Temporarily waterproofs the roof can stay uncovered for up to 3 months. We provide a vapour control layer for flat roof installations as well as heavy duty vapour control layers for a warm flat roof. This is known as. The vapour barrier is suitable for both warm and cold deck designs.

There is no requirement for any air gaps. A vapour control layer or vcl on a warm flat roof sits between the roof decking and the insulation. For all warm flat roofs a fully intact vapour barrier would be required on the room side under the insulation. Its not cheap purchasing it by the role and by the pallet load is cheaper but is a considerable layout.

Comparatively a vapour barrier prevents any movement of vapour or air occurring through the building instead of just limiting it to a controlled level. Self healing if punctured by fixings. Next to that you may also buy a moisture regulating vapour barrier membrane that can manage the damp even better. Damplas vapour control layer vcl is intended for use within flat roof structures to prevent the penetration of moisture into structure surfaces and to improve the airtightness of buildings.

If the roof is insulated with foil faced insulation blankets the aluminium side can serve as a vapour barrier at the same time. The notion behind a vapour control layer is to install it on the room. However note that one should seal the seams here as well. Including fibreglass roof kits torch on felt and liquid rubber products everything you need for flat roofing is in one place.

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. 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. Why is it the best vapour barrier for flat roofs. In this case you need to lay a full vapour barrier on top of your flat roof deck before you lay the insulation and your flat roof covering.

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. 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. Vapour resistance of 2000 mns g. The answer to keeping timber framed walls and roofs dry is to use a layer to restrict the flow of moisture but not to try and stop it.