Vapour Control Barrier Flat Roof

This is known as.

Vapour control barrier flat roof.

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

Using a vapour control layer to control condensation. 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. 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. Including fibreglass roof kits torch on felt and liquid rubber products everything you need for flat roofing is in one place.

A vapour control layer or vcl on a warm flat roof sits between the roof decking and the insulation. Comparatively a vapour barrier prevents any movement of vapour or air occurring through the building instead of just limiting it to a controlled level. 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.

There is no requirement for any air gaps. 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. 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. 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.

The vapour barrier is suitable for both warm and cold deck designs. For all warm flat roofs a fully intact vapour barrier would be required on the room side under the insulation.