Builders get the brunt of home buyer frustration, even when it’s not their fault. This week’s guest addresses the reasons behind this frustration and explains how building material manufacturers can help reduce that frustration on all sides.    Adam Steiner is the owner of Birnam Design Co., a full-service residential home design firm, as well as the host of the Builder vs. Buyer podcast. He talks with Beth about the widening gap between home buyers and builders, and how manufacturers can help close the gap.