the same area. This could be attributed to a combination of age and code/product changes. The Institute noted that more study is needed to further explore these issues.
TAMPA, Fla.—Institute for Business & Home Safety (IBHS) released its latest research study, “Surviving Nature’s Fury: Performance of Asphalt Shingle Roofs in the Real World,” which investigated damage from Hurricanes Gustav and Ike in 2008.
2. Newer shingle roofs installed after the Texas Department of Insurance adopted the 2000 International Building Code in February 2003 exhibited much less wind damage from the wind speeds produced by Hurricane Ike than older roofs in
3. Damage occurred even in fairly light winds — peak gust wind speeds in the areas where houses were studied were less than 90 mph. This demonstrates that it does not take a major hurricane with high wind speeds to substantially damage a roof.
Roof cover damage continues to be the most frequent source of hurricane-related insurance claims not related to storm surge. The multi-variant IBHS findings offer compelling evidence of how well asphalt shingle roofs would perform during a hurricane.
Taking in a Bigger Picture “Our research took a much broader approach than what has been done in prior post-hurricane disaster investigations,” said Dr. Timothy Reinhold, IBHS’ senior vice president of research and chief engineer. “IBHS’ analysis examined damage levels at relatively low wind speeds as a function of the age of the roof, the adoption and enforcement of modern building codes, and investigated the validity of questions concerning whether the current approach to the design of shingles that reduces uplift loads is adequate.”
Salient Points “Surviving Nature’s Fury: Performance of Asphalt Shingle Roofs in the Real World” uncovered a number of findings, among them, these.
1. A significant number of roofs installed after 1998 experienced damage. Many of the roof coverings experienced damage to less than one percent of the total roof covering. The damaged roof area of homes built between 1996 and 2001 averaged four to five percent. Roof damage dropped dramatically for homes built after 2002. It is too early to tell whether the better performance was due to the newness of the roof covers or to building code changes in 2002, which added a check for roof cover wind rating.
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