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Abstract
Application alternatives for adhering SBS modified bitumen sheet materials include hot mopping asphalt or bitumen, heat welding, liquid cold process adhesive, and self-adhesive. When SBS-modified bitumen roof membranes were introduced in the United States in the late 1970s, the majority of the North American contractor base was built-up roofing oriented. Familiarity with hot asphalt application and practicality of dealing with existing equipment made installation of SBS-modified bitumen membranes in hot oxidized asphalt an easy choice. The early history with SBS-modified bitumen systems in Canada reveals that torch applied SBS membranes were more popular. Laboratory testing and field experience have demonstrated that solvent-based (cold) adhesives, heat welding, and heat-activated self-adhesives offer higher interplay performance than oxidized bitumen. Across North America torching applications have come under the increasingly heavy scrutiny of the insurance industry, and there have been historic shifts in the world of petroleum refining. Some fundamental characteristics and performance differences of various types of interply attachment methods specific to SBS-modified bitumen roof membranes will be updated in this paper. As a result, practical considerations in choosing the appropriate application method will be addressed. This paper is a follow-up to work presented at the NRCA/BWA 12th International Roofing and Waterproofing Conference in September, 2002.
Application alternatives for adhering SBS modified bitumen sheet materials include hot mopping asphalt or bitumen, heat welding, liquid cold process adhesive, and self-adhesive. When SBS-modified bitumen roof membranes were introduced in the United States in the late 1970s, the majority of the North American contractor base was built-up roofing oriented. Familiarity with hot asphalt application and practicality of dealing with existing equipment made installation of SBS-modified bitumen membranes in hot oxidized asphalt an easy choice. The early history with SBS-modified bitumen systems in Canada reveals that torch applied SBS membranes were more popular. Laboratory testing and field experience have demonstrated that solvent-based (cold) adhesives, heat welding, and heat-activated self-adhesives offer higher interplay performance than oxidized bitumen. Across North America torching applications have come under the increasingly heavy scrutiny of the insurance industry, and there have been historic shifts in the world of petroleum refining. Some fundamental characteristics and performance differences of various types of interply attachment methods specific to SBS-modified bitumen roof membranes will be updated in this paper. As a result, practical considerations in choosing the appropriate application method will be addressed. This paper is a follow-up to work presented at the NRCA/BWA 12th International Roofing and Waterproofing Conference in September, 2002.
Date
0/2007
0/2007
Author(s)
Tim Kersey; Kirk Goodrum; Jeremy Turner
Tim Kersey; Kirk Goodrum; Jeremy Turner
Page(s)
Keyword(s)
SBS modified; performance property; interply adhesive
SBS modified; performance property; interply adhesive