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I have a two-story house in Miami. The roof before hurricante Wilma was a combination of metal and concrete tile. The center portion of the roof was flat and covered with a 10' by 20' piece of copper. The rest of the roof was pitched and covered with square concrete roof tiles. The roof was 22 years old this year, when Hurricane Wilma tore off the copper and dropped it in my front yard, but left all of the tiles.
My question is this. It seems to me that metal roofing would inherently be more exposed to damage in the event of a hurricane in its natural propensity to act as a "sail" in the event any wind gets under it. In other words, with a metal roof, are we more likely to lose the entire roof in the event of a wind breach, as opposed to a few tiles?
I would love to have a metal roof, but I need to rationalize the mechanics of how a metal roof is more resistant to hurricane winds than a tile roof. I see an awful lot of metal roofs in the keys, where hurricanes pass through every year...
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What you had with your copper roof was very unusual as metal roofing goes. Most metal roofing is not in large sheets but instead in individual interlocking panels with hideen fasteners. Most of today's residential metal roofing systems have passed the wind tests required by Dade County Florida.
12/26/2005
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12/27/2005
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