The two types of shingles are similar. Asphalt shingles are formed from a mat of organic felt, while the base for fiberglass shingles is a fiberglass mat. Fiberglass shingles contain up to 50 percent more asphalt than asphalt shingles, and often have a longer warranty and better fire rating. To prevent this, most come with seal-down strips, which work best if the shingles are applied in warm weather so the strip's asphalt has a chance to soften and adhere to the next shingle. Regardless of your choice, be sure the shingles meet underwriter laboratory requirements for fire resistance and wind lifting, and come with a warranty against wind damage.
Application is as important as the shingle's quality.
Be sure to check the contractor's references. Look at jobs that were done several years ago and ask previous customers if work was done correctly at the contracted price. Also check the contractor's insurance on his or her employees and against property damage. You are the 5552nd access to this page.