Vapour Control Layer For Warm Flat Roof

With any warm flat roof detail such as this a vapour control layer should have been laid on top of the roof deck underneath the insulation. 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. Much like the cold roof it stops the transfer of warm moist air from inside the building into the warm roof layers.

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The notion behind a vapour control layer is to install it on the room.

Vapour control layer for warm flat roof.

Vapour control layers vcl. I have been looking through insurance and they seem to ask about type of flat roofs. A question for the experts. Hi i m in the process of building a single story flat roof extension.

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. Using a vapour control layer to control condensation. Vapour control layers should be provided to warm roofs and. The type of 3 layer roof.

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. A vapour control layer or vcl on a warm flat roof sits between the roof decking and the insulation. This could be a 1000 gauge min polythene sheet. I have a 3 layer.

If this has not been done then we would recommend that you install one underneath the joists before the plasterboard goes up. We provide a vapour control layer for flat roof installations as well as heavy duty vapour control layers for a warm flat roof. Often the vcl in a warm roof is bonded to a timber substrate which helps the integrity however in a warm roof the vcl has two important functions. The flat roof has 2 roof lanterns.

Including fibreglass roof kits torch on felt and liquid rubber products everything you need for flat roofing is in one place. Include at least one layer of bitumen roofing membrane s2p3 below the insulation fully bonded or mechanically fixed to the structural deck as appropriate or a suitable self adhesive or torch on membrane. 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. 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.

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