IKO Spectravap is a 0.3mm thick polyethylene Vapour Control Layer (VCL), suitable for use on most IKO Polymeric mechanically fastened systems.
IKO Spectravap is loose laid over the substrate, and side/end laps are overlapped and sealed with a suitable butyl jointing tape.
On rough surfaces, a layer of IKO Spectratex Geotextile is used as a cushion layer before installing the IKO Spectravap VCL.