| http://www.w3.org/ns/prov#value | - Klein said he expects subcontractors to start offering bids that let them change material prices to keep up with increases.???I don???t think there???s been that kind of increase in concrete or anything like that,??? he said. ???Asphalt shingles are a petroleum product, and the EPDM (ethylene-propylene-diene terpolymer) roofing is a petroleum product, and I???m guessing that had a lot to do with i
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