Abstract
During the past several years, the use of long-term thermal resistance (LTTR) method for determining and reporting R-values for plastic foam insulation has been implemented and is gaining acceptance in U.S. and Canadian roofing markets. Following is a summary of a research program in which NRCA participated. A work group tested R-values of aged insulation samples and compared results with the products' represented LTTR values.
During the past several years, the use of long-term thermal resistance (LTTR) method for determining and reporting R-values for plastic foam insulation has been implemented and is gaining acceptance in U.S. and Canadian roofing markets. Following is a summary of a research program in which NRCA participated. A work group tested R-values of aged insulation samples and compared results with the products' represented LTTR values.
Date
1/2006
1/2006
Author(s)
Mark Graham
Mark Graham
Page(s)
30-31
30-31
Keyword(s)
LTTR; long term thermal resistance; r-value;
LTTR; long term thermal resistance; r-value;