Daily Archives: November 12, 2013

R-values: Controversy and performance values (cont’d)


Photo © BigStockPhoto/ Leung Cho Pan

The first article in this two-part series lays the groundwork for this discussion on R-values and their use as a metric for thermal insulation performance. Now, in this second part, the author examines the real-world use of it as a gauge for ensuring insulation products function as intended.1

When it was created, R-value was really the only useful tool in evaluating the effectiveness of the available building insulations, among other materials. After the R-value rule was instituted, the energy efficiency of buildings improved, as well as the nation’s energy conservation effort and the marketplace and technology for insulations. Today, though, most of the insulation industry knows better, and R-values may well be dismissed as meaningless numbers on an insulation package that help to better organize warehouses. Continue reading

EIFS: Then and now

Our September 2013 article on entrapped moisture touched on issues related to early iterations of exterior insulation and finish systems (EIFS). It led to this letter to the editor from Scott Robinson, of the EIFS Industry Members Association (EIMA).

While going through the September 2013 issue of The Construction Specifier, I read, “Claddings and Entrapped Moisture: Lessons Learned from Early EIFS,” by John Koester. As manager of public affairs with EIMA—a national non-profit technical trade association comprising EIFS manufacturers, suppliers, distributors, and applicators—the article gave me pause. Continue reading