Roofing Supply Group LLC (RSG) announced Friday it has acquired Construction Resource Inc. (CRI), a supplier and distributor of roofing materials with locations in Oakland and Sacramento, Calif.

"Construction Resource Inc. has a long-standing reputation as a leading distributor of quality commercial roofing and waterproofing materials in Northern California," Mike Farrell, president and CEO of RSG, said in a statement. "We are extremely pleased that Mark Newman elected to transition his successful distributor business to RSG. We look forward to strengthening our commercial presence in the region, building on our relationship with Firestone and Mark as he continues to work as Firestone's agent representative in Northern California, and learning from CRI's team of commercial roofing experts."

CRI distributes Firestone roofing materials and CETCO waterproofing and specializes in commercial roofing and waterproofing.

Dallas-based RSG, a unit of The Sterling Group, has nearly 60 branches in close to two dozen states. It is one of the 10 biggest companies on the ProSales 100.