SC Roofing Contractor Practice Questions - South Carolina General Contractor - Roofing Subclass Exam

What is the correct method for torch-applying a modified bitumen cap sheet?

Heat only the substrate, then lay the sheet on top Heat the underside of the sheet while unrolling, creating a visible flow line at the leading edge Heat both the substrate and the sheet until smoking, then press together No heat is needed for modified bitumen installation

Correct Answer:

Heat the underside of the sheet while unrolling, creating a visible flow line at the leading edge

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