A question of accuracy

Abstract
In January, North American polyisocyanurate insulation manufacturers implemented updated procedures for testing and reporting the insulation’s long-term thermal resistance (LTTR). You should be aware of polyisocyanurate insulation’s aging properties and the LTTR methodology, as well as NRCA’s opinion regarding whether LTTR accurately predicts polyisocyanurate insulation’s long-term R-value.

Date
5/2014

Author(s)
Mark Graham

Page(s)
46-50

Source
Professional Roofing / National Roofing Contractors Assn

Keyword(s)
polyisocyanurate; insulation; lttr; r-value; aging

Download

Note: Documents in this section are provided as Adobe Acrobat PDF files. In order to print and view PDF files, the Adobe Acrobat Reader software/plugin, which runs on Microsoft Windows, Macintosh, OS/2 and various versions of UNIX, must be installed on your computer. Adobe Acrobat Reader is available for download as freeware from Adobe Acrobat's website. Please note that the resolution of on-screen versions is not as high as printed versions of PDF files.

Subscribe for Updates Join 25,000+ roofing professionals following NRCA

Chat with usLiveChat