Buttressed by new home construction and storm-related damage repairs, U.S. roofing contractors are now in their fourth consecutive year of improved profitability and double-digit increases in sales, according to data from Sageworks, a financial information company. Sales among privately held roofing contractors have increased, on average, 14 percent in the 12 months ended May 1, according to Sageworks’ financial statement analysis. That’s on top of 13.5 percent and 15 percent