Air and Vapour Control Layers
The Vapour Control Layer (VCL) needs to effectively manage the passage of water vapour through the building envelope, comply with EN 13984 and be specified in accordance with BS 5250: Code of Practice for Control of Condensation. Sarnavap vapour control layers can meet with both these requirements.
Another very important function of a VCL is that of an Air Leakage Barrier. By preventing the unwanted movement of air, convective energy losses can be minimised. Using Sarnavap VCLs means that this critical element is fully compatible with the system with guaranteed performance and no split in the liability.