Labels:chat room | clock | hakham | poster OCR: Diminishing Returns in R-Value for Increasing Thickness of Insulation The graph vou just sawis representative of any insulation's thermal performance provided there is no move ment or leakage This study was conducted by the National Research Council and has dramatically changed our understanding the effectiveness of increasing insulation thickness Note the rapidly diminishing benefits from increase in R-value Bevond -5 inches increasing thickness of insulation increases cost for insulation studs, windows. jambs etc but results in only fractional percentage increase ir energy savings This is obviously not cost effective The new International Building Code and International Residential Code have taken note of this with performance based "alternative measures that can allow for thinner se cti ...
