Vapour barriers
In order to prevent building components becoming damp, a vapour barrier must reliably prevent any diffusion from within. The BauderTHERM DS 1 DUO and BauderTHERM DS 2 fast-torchable membranes are reliable and time-saving. Their thermal stripes with activatable self-adhesive bitumen enable the thermal insulation to be installed considerably more quickly and with no additional adhesive.With trapezoidal sheet steel and timber substructures the cold self-adhesive vapour barriers BauderTEC KSD DUO and BauderTEC DBR perform superbly as a reduced fire load vapour barrier; installation is quick and does not require a torch.
Worth knowing ...
Do vapour barriers need to be fully bonded?All roof systems must be secured against wind uplift forces. One method is mechanical fastening in the substructure (e.g. trapezoidal sheet metal). With constructions of this type it is not mandatory to bond vapour barriers to the sublayer; instead the layer is secured by screw connection to the thermal insulation and the waterproofing membrane. In the case of concrete substructures, bitumen vapour barriers are generally welded onto the primer. This can also be done across either part or all of the surface area, depending on the type of layer fastening. Protection from wind uplift must be verifiable. It is therefore not absolutely essential for vapour barriers to be fully bonded to the sublayer. However, in order for this layer to function correctly it must be installed with an airtight seal.