SC Roofing Practice Questions - South Carolina Roofing Contractor Examination Exam

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A crew seaming EPDM with 6-inch seam tape and a crew seaming TPO with a hot-air welder are both doing field splices. Which statement is correct?

Both methods can be watertight if the manufacturer's cleaning, primer (for EPDM tape), weld temperature/speed (for TPO), and overlap are followed; the chemistries are not interchangeable Either tape or a welder may be used on either membrane because both are single-plies EPDM tape must be heat-welded after it is rolled TPO welds require Type III asphalt as a flux

Correct Answer:

Both methods can be watertight if the manufacturer's cleaning, primer (for EPDM tape), weld temperature/speed (for TPO), and overlap are followed; the chemistries are not interchangeable

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