RI Roofing Contractor Practice Questions - Rhode Island Commercial Roofing Contractor Exam

What is the difference between APP and SBS modified bitumen roofing membranes?

APP is installed with cold adhesive; SBS uses hot mopping APP is rigid and heat-resistant; SBS is flexible and cold-resistant APP is used only on flat roofs; SBS is used only on steep slopes There is no practical difference; they are interchangeable

Correct Answer:

APP is rigid and heat-resistant; SBS is flexible and cold-resistant

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