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The cost of key construction materials increased in August and year-to-year, resuming a trend that has forced contractors to pay more for materials even as competitive pressures restrain prices for finished projects, according to an analysis of federal figures released today by the Associated General Contractors of America. “After years of depressed construction activity, the last thing contractors need is to see materials price increases further erode their already slim margins,” said Stephen E. Sandherr, the association’s chief executive officer. “This isn’t the kind of economic recovery most contractors spent the past few years praying for.” Read the full press release . The news was covered by the , , , , and .