Quad-Lock ICF vs Wood Frame Construction:
We have all heard builders claim to build "R-13" or "R-21" walls with wood frame construction. The problem is that only the highest rated component in the wall - the insulation itself - performs at these stated R-values. A wood frame wall is made up of several components, not all of which have the same R-value. For instance, a 2x4 or 2x6 stud has an R-value of about R-5 or R-7. Every 16 inches or so, one of these components breaks the insulation layer and forms a "thermal bridge", conducting heat through the walls at high rates in addition to being a major cause of mold in standard construction. Adding up the area of studs, plates, and headers, 12% to 16% of the total wall area is an R-5 or R-7 thermal bridge, all detracting from the stated R-value. In addition, batt insulation tends to sag over time and leave spaces without any insulation! How can those builders claim only the highest-component R-value? From a whole-wall perspective, framed walls operate at far lower R-values - sometimes only half of the advertised value.