Description
Box, FRP, 11"x18"x12", Tier 22 – B19111812A – Quazite American Excelsior Each drainage layer mat is Each drainage layer mat is applied over the rooftop surface and provides a protective layer that enables both drainage and breathability of roof membranes To protect the pipes from freezing temperatures it is recommended to add the Chromalox Heat Cable #30 with 90W of heat