Insultex IHW-100 is a weather barrier system that can be applied behind any exterior claddings for commercial and residential construction. It is ICC-ES AC 38 approved for Grade C Type materials and has been tested for R-Value, surface burning, pliability, water resistance, dry breaking force, and UV exposure. The IHW-100 is easy to install and can be applied in shingle-lap fashion with higher courses lapped over lower courses by at least two inches. Vertical seams created by ending one roll and beginning another should have an overlap of at least six inches.