Fiberglass batt insulations intended for use in buildings are labeled with an R-value and a thickness at which the R-value is achieved. In some cases the insulation is installed in such a way that the label thickness is not achieved. The material R-value of fiberglass batts installed at less than full thickness will be less than the full-thickness R-value.
AnonymousNational Association of Home Bmlders, " Product Specifications.," pp. 6-8.
2.
Astm C 518-85.1989. "Standard Test Methods for Steady-State Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus,"Annual Book of ASTM Standards, 04.06:150-162.
