Shingle-Mate® Roof Deck Protection Avoid A Buckled, Bumpy-Looking Roof With Superior Roof Deck Protection Superior Quality Roof Deck Protection Can Protect And Beautify At The Same Time! Quality roof deck protection (often referred to as “tar paper” or “felt”) provides an extra layer of protection between your shingles and your roof deck. It helps prevent wind-driven rain (or water from other sources) from infiltrating under your shingles and causing damage to your roof structure or the inside of your home. It will also: Lay flatter and avoid “telegraphing” wrinkles Help allow shingles to lay flat and uniform Result in a better-looking roofing job Shingle-Mate® roof deck protection is a key part of the GAF Smart Choice® Roof System Solution, and has even earned the prestigious Good Housekeeping Seal.