Passive House Institute U.S. reconsiders endorsement of spray polyurethane foam

The enlightened building scientists that contribute to have been publishing numerous articles and reports weighing the pros and cons of various insulations. Based upon their research, the site has brought attention to the fact that spray polyurethane foam (SPF) uses petroleum-based blowing agents that are believed to contribute to global warming. Passive House Institute U.S. (PHIUS) is listening.

The proposals generated a number of responses from the building community that prompted PHIUS to present the issue to the organization’s recently formed technical committee, whose members include Passivhaus consultants and other building-science experts.

“It’s clear, though, that lots of folks in the Northwest community and elsewhere feel strongly about this issue,” PHIUS Executive Director Katrin Klingenberg wrote in a December 14 note to members of the “Passive House Northwest” Google Group. “Therefore, PHIUS will refer the spray foam/blowing agent matter for consideration to our Technical Committee, which comprises practicing Certified Passive House Consultants and building science experts from around the United States, including Graham Wright, whom many of you know. (The original determination was made before the Tech Committee was launched.) Whatever the Committee decides is fine. We are confident that we will move away from the blowing agent in question in the near future regardless.”