Thermal bridging through wood framing accounts for significant heat loss in every home. The rSTUD is an engineered stud with a foam thermal break sandwiched between two pieces of LVL to create typical nominal-dimensioned studs. The high-density foam delivers stud R-values of 7 for a 2x4 and R-21 for a 2x6. According to the company, using the studs can boost a homes efficiency by up to 20% versus traditional lumber. 800.768.7054.