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. VCLs prevent excess moisture entering a wall’s cavity, behind the insulation.

Be it a cold or warm roof construction, the primary function of a VCL is to keep warm moist air from inside the building – inside the building. It’s the first line of defence against high vapour pressure air entering the roof structure and causing interstitial condensation. Because of this, the VCL always sits at the warm side of the ...

2024年10月15日 · A vapour control layer (VCL) helps stop moisture from moving into your roof. It keeps the warm air inside from reaching colder parts of the roof, where it can turn into water. This water could cause damage, like mould or rot.

2022年4月3日 · A 'vapour control layer', or 'VCL', reduces the water vapour transfer through any building and reduces the risk of condensation forming. This is done by installing it on the inner side of the insulation – for example, in a pitched roof, this would sit beneath the layer of insulation that has been installed between the rafters.

Vapour control layers (VCLs) are layers of specific materials which are used to prevent the movement of water vapour into a building’s structure. If moisture and condensation build up inside a property it can lead to problems with mould, damp and rot.

2023年5月31日 · What is a VCL? A VCL is a membrane used throughout construction projects and it is designed to protect building elements from degradation by restricting the movement of water vapour from inside a building to within the building structure (interstitial condensation). A VCL therefore helps prevent interstitial condensation.

Perfect for installation in roofs, ceilings and walls, they’re airtight and provide effective condensation control for all building types. Our range includes barrier membranes, EasySeal Bitumen and reflective VCL membranes, all of which aim to reduce moisture in your home and help you get the maximum energy efficiency.

When insulating a roof, whether it's flat or pitched, there's one fundamental rule to follow: you'll need to install a vapour control layer (VCL) on the warm side of the insulation and an airtightness layer on the cold side. This is crucial because the VCL limits the amount of …

VCL membranes work by preventing water from condensing and forming surface water. Typically installed on the warm side of the insulation, the VCL blocks warm, moist air from entering the roof space.

That’s exactly where vapour control layers (VCL) come in, saving the day by stopping the outward movement of water vapours into your insulation and bricks. You’re probably wondering: How do you install a vapor barrier membrane?