Profile: Roofline Supply & Delivery specializes in offering roofing materials and products. Our products include 3-tab, composite laminate, tile/slate, cedar and sierra shake siding. Cambridge premium architectural shingle provides looks of a shake-like appearance. These are designed with double-layer construction and a tough, modified sealant for tear strength values & greater resistance to high winds. It is available in computer- generated color blends of nature's accents color series. WeatherLock® G granulated water-resistant underlayment provides roof deck protection. It helps to prevent damage caused by freeze/thaw cycling, wind-driven rains, and normal water flow that occurs around valleys, vents, chimneys & skylights.