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Old 10-08-2021, 01:22 PM   #1
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Aluminum skin underneath flooring

The aluminum skin underneath my Forza has several places where it has cracked and where corrosion has damaged it. Should I try and patch the the aluminum or can I just caulk it with silicone?

The floor has been repaired and the water leak at the water heater has been repaired.
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Old 10-09-2021, 07:59 AM   #2
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There’s Aluminum decking under the floor in your RV? I’ve never heard of this.
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Old 10-09-2021, 09:19 PM   #3
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my 99 vectra gt has aluminum sheeting under the floor.
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Old 10-09-2021, 09:40 PM   #4
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Hi Terry,
My Minnie Winnie 22M has what appears to be blue-anodized aluminum on its underbelly. Perhaps a product made specifically for aluminum would be better; something like Hy-Poxy H-450 Alumbond?
Please let us know how you finally do the repair.
Thanks, Eagle5
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Old 10-10-2021, 07:52 AM   #5
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Quote:
Originally Posted by Eagle5 View Post
Hi Terry,
My Minnie Winnie 22M has what appears to be blue-anodized aluminum on its underbelly.
Hummm, I have this too, but I’ve never thought of it as underlayment for the floor. I guess it must be?
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Old 10-13-2021, 06:22 PM   #6
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I talked to Winnebago about what to expect during a floor repair. I was told there would probably be a layer of tin on the outside. Do NOT, he said, patch it with aluminum if it needs patching, as it's not tough enough for all the gunk that the underside is exposed to.
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Old 10-13-2021, 08:06 PM   #7
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Hi Lemonade,
I must admit that I am surprised that Tin is used to skin the floor on the underside. At $16.50 per pound, it is more expensive than other materials, and not particularly lightweight. At 0.264 Lb/in3, it is 2.7 times heavier than Aluminum's 0.0975 Lb/in3.
I would therefore change my recommendation to patch it with standard-cure J-B Weld.
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Old 10-14-2021, 11:35 AM   #8
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I expect when they said Tin they were referring to thin sheet steel and not actually Tin.
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Old 10-15-2021, 07:27 AM   #9
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I am wondering if they are confusing underside of rv floor boards with underside of RV. In our case our rv floor bottom is the top of the basement and not exposed to anything out harsh?? We have a couple of plats under the RV that I would call tin and the cover on the floors appears to be a thin aluminum.
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