Contributor

Timothy M. Crowe

Timothy M. Crowe, RA, SE, PE, is an associate principal with Wiss, Janney, Elstner Associates Inc., Northbrook, Ill. He has more than 25 years of experience in the design, investigation and repair of archaic and contemporary building structures.

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Consider the snow

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Reroofing becomes a building owner's best option when a roof system has exhausted its serviceable life. However, before reroofing work is undertaken, it is important for roof system designers to determine a roof structure's ability to support extra weight, especially in locations with cold climates. Additional insulation could cause increased snow loads on a roof system. If designers do not take this into consideration, a roof collapse could occur.

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