The quality of the materials and installation will determine your satisfaction with the result and determine the performance and longevity of your gutter system. Choose a contractor with a solid reputation and ask for references, proof of licensing and insurance, and a written estimate. Other considerations include:
Warranty. Get a written warranty for materials and labor and ask whether the installation will impact the warranty on your roof. Support. Gutter hangers should be spaced 18 to 24 inches apart and installed behind the roof flashing to prevent leakage between the gutters and the fascia board. Pitch. The slope helps divert the water toward the downspouts and should be installed at a pitch of one-half inch for every 10 feet of gutter. Sizing. Basic engineering is needed to ensure proper sizing based on factors including the home’s square footage, the complexity of your roofline and local weather.