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Originally Posted by edwardo37
Can someone give me the pros and cons of metal vs. fiberglass siding?
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Fiberglass gel-coat looks better, is easier to wash and clean up, and is heavier and more expensive. Aluminum is lighter, doesn't look as good to most eyes, and dents easily, but costs less. Way back in 2001 model year, my 5er had aluminum siding standard and fiberglass as an extra-cost option. I barely remember that sticker, but I think the fiberglass option listed for about $1000.
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A dealer told me they were getting away from fiberglass due to leaking problems; anything to this?
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No. In fact my new ecomomy-priced 2012 TT has fiberglass gel-coat front and rear with aluminum sides. The fiberglass front resists the bugs and bird hits better, and is much easier to clean up the bug juice after a trip. One reason they used fiberglass for the sloped front is because it is less likely to leak between the seams of the aluminum siding. I don't expect any leaking problems between the seams on the sides, or any leaks at all assuming the factory properly sealed between the roof and the sides.
In about 12 years and over 100,000 towing miles, my 5er with fiberglass siding didn't leak a drop. Darling Daughter is still living in it and reports no problems.
Dealers want to sell what they have in stock. Perhaps your dealer was overloaded with aluminum skins, and the better fiberglass units were in short supply?
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From what I think I know the metal siding models have wood frames and the fiberglass has metal frames; is this correct?
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No. The siding is not related to the frame construction, although the more expensive fiberglass skin is more likely to be on the more expensive aluminum frames. And then some are like mine = fiberglass front and rear caps with aluminum on the sides. And some are like my previous 5er = mostly wood frame, but alumium framing around the doors and windows, with standard aluminum siding but optional fiberglass siding.