[BLDG-SIM] Insulation Values
Leon Glicksman
glicks at MIT.EDU
Fri Feb 24 14:02:21 PST 2006
Insulation ValuesYes it does.There is a rapid (on the order of months) change as air diffuses in. A longer change occurs as the blowing agent diffuses out. Some manufacturers give the R value after a certain time period.
Leon R. Glicksman
Professor of Building Technology and Mechanical Engineering
Massachusetts Institute of Technology
Room 5-418
Cambridge, MA, 02139
Phone 1 617 253 2233
FAX 1 617 253 6152
E-mail glicks at mit.edu
----- Original Message -----
From: Zoeteman, Mark R.
To: BLDG-SIM at gard.com
Sent: Friday, February 24, 2006 4:41 PM
Subject: [BLDG-SIM] Insulation Values
Does thermal conductivity of polyisocyanurate roof insulation change over time?
Will the R-value decrease over time? There seems to be conflicting information about this.
Mark Zoeteman
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