Abstract
In 1991, MRCA and NRCA began a joint field survey of APP and SBS modified bitumen roofs in response to several reports of various types of problems with these types of systems. Because modified bitumen roof systems are relatively new in the US and because of very limited published information on their field performance, the research project was undertaken. The purpose of the project was to evaluate the field performance of polymer modified bituminous systems, recommend procedures and design criteria to minimize observed problems, and recommend repair procedures for existing membranes. One hunder nine roofs, up to 13 years old were insepcted in 6 climatic areas of the US. The roofs inspected included both problem and non-problem jobs. A good or excellent rating was assigned to 76 percent of these roofs by the researchers. This report provides background information on the project, an overview of the use of modified bitumen roof systems in the US, documents the roofs inspected and their condition, and provides conclusions and recommendations concerning field performance, design, materials, application, maintenance and repair.
In 1991, MRCA and NRCA began a joint field survey of APP and SBS modified bitumen roofs in response to several reports of various types of problems with these types of systems. Because modified bitumen roof systems are relatively new in the US and because of very limited published information on their field performance, the research project was undertaken. The purpose of the project was to evaluate the field performance of polymer modified bituminous systems, recommend procedures and design criteria to minimize observed problems, and recommend repair procedures for existing membranes. One hunder nine roofs, up to 13 years old were insepcted in 6 climatic areas of the US. The roofs inspected included both problem and non-problem jobs. A good or excellent rating was assigned to 76 percent of these roofs by the researchers. This report provides background information on the project, an overview of the use of modified bitumen roof systems in the US, documents the roofs inspected and their condition, and provides conclusions and recommendations concerning field performance, design, materials, application, maintenance and repair.
Date
3/1996
3/1996
Author(s)
MRCA and NRCA
MRCA and NRCA
Page(s)
70
70
Keyword(s)
MRCA; NRCA; joint publication; APP; SBS; modified bitumen; field survey; low slope roof; performance; SEPS
MRCA; NRCA; joint publication; APP; SBS; modified bitumen; field survey; low slope roof; performance; SEPS