Although not about roofing, the novel introduces a fundamental
concept that can be applied to the fire safety of torch-applied
polymer-modified bitumen roof systems. For example, if during the
application process the ignition temperatures of combustible
substrate materials are not reached, the likelihood of fire is
To test this concept as it applies to torch-applied
polymer-modified bitumen roofing products, NRCA and Hughes Associates Inc.,
Baltimore, a nationally recognized fire consulting firm, devised a
program to test whether commonly encountered combustible substrates
will likely ignite during torching; the test revealed the minimum
ignition temperature of such substrates is 570 F.
Log in or register for FREE access to this article and other Professional Roofing online content.