Vapour Control Layer Concrete Flat Roof

A vapour control layer or vcl on a warm flat roof sits between the roof decking and the insulation.

Vapour control layer concrete flat roof.

The vapour control layer vcl often overlooked underrated punctured adlib and sometimes even completely omitted mainly because we re just not sure if it really is all it s cracked up to be after all even if we leave it out altogether the roof shouldn t leak right. Using a vapour control layer to control condensation 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. 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. Time and time again i see the wrong vaper control layer being used and installed incorrectly.

A vapour control layer or vcl for short is a plastic layer that restricts the movement of warm moist air from inside a property into the fabric of the building. The notion behind a vapour control layer is to install it on the room. 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. To insulate a flat roof with a concrete deck we recommend a warm deck construction method where the vapour control layer is sandwiched between the concrete deck and a layer of rigid pir insulation boards.

The roof should incorporate insulation and usually a vapour control layer to protect from interstitial condensation. 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. The concrete deck can offer greater speed of roof construction which is an important consideration on many larger commercial projects. Including fibreglass roof kits torch on felt and liquid rubber products everything you need for flat roofing is in one place.

Concrete slab flat roofs. Vcls prevent excess moisture entering a wall s cavity behind 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. Interstitial condensation can happen if warm air from inside th.

If this has not been done then we would recommend that you install one underneath the joists before the plasterboard goes up. Vapour control layers vcl.