CertainTeed shingles contain more asphalt than their competition making them heavier and more durable to the elements in return provides a lasting roof system. These shingles are tested by the underwriter’s laboratory verifying that their fiberglass shingles meet the quality standards of ASTM D3462 which rates the tear strength, nail pull resistance, and wind uplift. CertainTeed architectural shingles, the Landmark series has been consecutively rated as “BEST BUY” as well are consistently rated #1 in building industry surveys. If that is not enough for you to agree then there is the WARRANTY coverage, Certainteed stands behind their products and offers only the best warranty coverage available by any shingle manufacturer in our opinion. Ask your Residential Roofers sales agent about the warranty coverage offered by CertainTeed and by Residential Roofers this will help you to make the right choice.