Utilizing thermal modeling (THERM) of wall assemblies, fuentesdesign gains bettering understanding of thermal performance. THERM, a computer based program developed by Lawrence Berkeley National Laboratory can be used to evaluate two-dimensional heat transfer in building components including windows/doors, walls, foundations and roofs. Beyond evaluating energy efficiency an understanding of heat-transfer is fundamental to understanding problems related to condensation, moisture damage, and structural integrity (LBNL).

Below, isotherms used to determine the transfer of heat through a glulam window sill in a fuentesdesign mountain home.