Larissa Runkle provides details for homeowners on how to determine if roof replacement is necessary. As a general rule of thumb, roofs will need to be replaced every 15 to 30 years, or when 40%-50% of the roof is in need of repairs.
GAF Energy President, Martin DeBono gives instructions for homeowners on how to look for roof sagging, dark stains, water damage and holes or cracks by inspecting through the attic.