Vapour Control - The Critical Layer
The Vapour Control Layer is the first layer of attachment to the substrate and represents a critical layer in any flat roofing system.
Installation of the VCL is paramount to resist wind uplift forces and to keep the whole system attached to the structure with it’s primary function of preventing moisture vapour from within the building affecting the thermal insulation through condensation.
For substrates such as plywood, and other combustible surfaces it is recommended that a TorchSafe T.A. vapour control layer is used.
Specially formulated from self adhesive SBS modified bitumen formulations, the membranes are laid cold into a T.A. butyl activator which reacts with the bitumen to provide a secure initial bond to the substrate.
Choice of VCL
Anderson TorchSafe systems offer two vapour control layers which are thermically activated allowing for secure attachment to the substrate, protection of the structure from flame and providing a suitable base for the installation of the thermal insulation.