We have lived with R value as a method of understanding the energy efficiency of a product or wall or house for as long as I can remember (and that’s a disturbingly long time.) Our Tools Editor Steve Maxwell explains how new products are exposing the limitations of R value as a measure of efficiency.
Why ‘R value’ is not accurate
Rob Koci is the publisher of Canadian Contractor magazine. Rkoci@bizinfogroup.ca 647 407 0754