Malarkey Roofing Products has been manufacturing roofing products for nearly 50 years. The company offers a full line of residential roofing products and one of the most advanced lines of commercial roofing systems. Malarkey also manufacturers inorganic fiber mats that it uses in its roofing products. The company sells its fiberglass mat to other businesses both inside and outside the roofing industry. Malarkey's products are made at its 35-acre campus in Portland, Ore., and at its Southgate, Calif. facility.