Spectravap is a 0.3mm thick polyethylene vapour control layer (VCL), suitable for use on most IKO Polymeric mechanically fastened systems.
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 Spectratex Geotextile is used as a cushion layer before installing the Spectravap VCL.