In the first of a two-part series for Builder Online, Owens Corning’s Clarke Berdan details the implications for builders (more choices!) following two sets of code changes approved during the April International Code Council Meeting.  One new change enables builders to use air permeable (fiber glass) insulation in unvented attics. Previously, the lack of approved air permeable insulation options meant builders had one choice: spray foam insulation. The new proposal will allow for four more options. 

An upcoming article will focus on the other approved change relative to buried ducts.