Does it meet recognized industry performance standards?
For example, if you use a new green shingle that does not meet ASTM standards, a jury will ask you why you installed that product. 5. Does the product meet building code requirements? “If the manufacturer hasn’t tested it vis-a-vis the code requirements, stay away,” the lawyer warned. 6. How long will the product last? For shingles and siding, a new product should have a warranty of at least 10 years, Perrone said. 7. How difficult is it to repair the product? 8. Is there test data available? Through accelerated testing, the manufacturer should show evidence that the product will last for a designated time period, Perrone noted. “Ask for third-party certification so that it’s not just the product manufacturer who says it is good,” he said, adding that TP, UL, and ANSI are reliable certifications. 9. Are there installation issues that need to be considered? “You need to know how difficult it is to install and if the performance of the product is tied to installation,” Perrone stated, po
