![]() ![]() Most are two layer assemblies with the thicker layer of insulation installed parallel between the purlins and the thin layer is draped perpendicular over the purlin. Through-Fastened Roof without Thermal Spacer BlocksĪll liner systems listed in 90.1-2013 are multilayer. Standing Seam Roof without Thermal spacer blocks Standing Seam Roof with Thermal Spacer Blocks ![]() R3 thermal spacer blocks are incorporated with all assemblies which reference use of a thermal spacer block with one exception the Filled Cavity (FC) assembly lists a R5 thermal spacer block for the standing seam roof. ![]() Multiple R-values are listed in order from inside to outside. ![]()
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