by Roofer911.com |
The amount of hurricane damage that happens to your roof is pretty much dependent on the type of roofing materials used and how well they were installed. There has been a lot of controversy over distinguishing between hurricane damage and pre-existing problems when home owners file an insurance claim.
When assessing a roof after a hurricane, the investigator or roof repair contractor needs to have in-depth knowledge of installation methods, and how the weather affects the natural deterioration of the roofing materials. It's also necessary to be aware of how wind affects the roof.
The same air flow that happens over the wing of an airplane takes place over the roof during a hurricane. It does not happen uniformly. The greatest force is at the windward edges, the eaves, the corners and the rakes. This is where most wind damage starts on a roof. Then the uplift causes internal positive pressure that literally blows the roof apart.
The best preventative measure is to anchor the roof properly to the walls to resist the uplift. It must braced against the trusses to transfer the lateral load. Keeping the roof intact prevents the rest of the house from caving in or being doused with hundreds of gallons of water.
The more weathered the roof, the worse it will fare in a severe storm. Cracked or "alligatored" roofing compound used to seal seams and flashing easily get washed away in a heavy downpour, leaving material edges exposed to the wind. There is no "magic" to preventing hurricane damage - it's a matter of keeping your roof in good repair.
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