According to NRCA's 2002-03 market survey, spray polyurethane
foam- (SPF-) based roof systems accounted for about $475 million of
the $29.69 billion total U.S. roofing industry sales in 2002.
Because SPF-based roof systems annually capture a significant
dollar volume, it is important for roofing contractors and building
owners to procure and use SPF materials that meet minimum building
SPF currently used in roofing applications does not meet the
minimum R-value and dimensional stability requirements of ASTM
C1029, "Standard Specification for Spray-Applied Rigid Cellular
Polyurethane Thermal Insulation." ASTM C1029 is in the process of
being updated, but when changes will be incorporated in a new
version of C1029 currently is unknown.
When ASTM C1029 is updated with new requirements for R-value and
dimensional stability, SPF that complies with the updated version
also will meet minimum building code requirements for five of the
six model building codes—BOCA National Building Code,
1999 edition; 1999 Standard Building Code; 2003
International Building Code; 2003 International Residential
Code; and Building Construction and Safety Code™
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