Commercial low-slope roofs can carry different kinds of warranties including materials warranties from the manufacturer (10-20 years) and workmanship warranties from the installing contractor (1-5 years).
Then there are full-system warranties from the manufacturer that cover materials and labor for a substantial period of time – 10 to 20 years or more. Although these are still “limited” warranties, they are the most comprehensive and can be well worth it. They usually include an inspection by the manufacturer to ensure that the roof was installed properly by an authorized contractor.
Keep in mind that all warranties exclude “third-party damage,” which refers to problems caused by something other than the roof or the installer. Examples include hail, fire, gale-force wind, tornado, punctures, cigarette burns, and bullets falling after being shot into the air on the Fourth of July (we really see a lot of those).
All warranties are different and each one means exactly what it says, so reading and understanding your warranty is important. Remember, however, that even though a warranty is a comforting backstop in case something goes wrong, no 8½” x 11” piece of paper will ever keep water out of your building. We recommend concentrating on selecting the right roofing contractor and the right roof system. If we at Commonwealth Roofing can help, call, click or email.