NRCA has updated their R-value recommendation for polyisocyanurate roof insulation with the publication of the 2011 The NRCA Roofing Manual: Membrane Roof Systems.
The new recommendation for R-value is based upon testing by NRCA from 2005 to 2009 on current generation polyisocyanurate roof insulations. The new NRCA R-value recommendations are as follows:
R-value = 5.0 per inch thickness in heating conditions.
R-value = 5.6 per inch thickness in cooling conditions.
Related Stories
| Jul 20, 2012
2012 Giants 300 Special Report
Ranking the leading firms in Architecture, Engineering, and Construction.
| Jul 20, 2012
Data Centers Report: Demand ‘exploding’
BD+C's Giants 300 Top 25 AEC Firms in the Data Center sector.
| Jul 20, 2012
Office Report: Fitouts, renovations keep sector moving
BD+C's Giants 300 Top 25 AEC Firms in the Office sector.
| Jul 20, 2012
K-12 Schools Report: ‘A lot of pent-up need,’ with optimism for ’13
The Giants 300 Top 25 AEC Firms in the K-12 Schools Sector.
| Jul 20, 2012
Higher education market holding steady
But Giants 300 University AEC Firms aren’t expecting a flood of new work.
| Jul 20, 2012
3 important trends in hospital design that Healthcare Giants are watching closely
BD+C’s Giants 300 reveals top AEC firms in the healthcare sector.
| Jul 20, 2012
Global boom for hotels; for retail, not so much
The Giants 300 Top 10 Firms in the Hospitality and Retail sectors.
| Jul 20, 2012
Gensler, Stantec, Turner lead ‘green’ firms
The Top 10 AEC Firms in Green Buildings and LEED Accredited Staff.
| Jul 19, 2012
Renovation resurgence cuts across sectors
Giants 300 reconstruction sector firms ‘pumping fresh blood in tired spaces.’
