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Old 04-01-2014, 04:20 PM   #21
JRTJH
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Spray on foam would be functional in some areas, but the problem with using spray foam is that it adheres to everything. In the future, should you need to access the frame, the undercarriage, some of the wiring that runs under the floor, the tanks or ??? If it is all sealed in foam, it would be very difficult to "dig it out" to work on anything.

There are some people who have used fiberglass insulation, placed it strategically and then used spray on foam over that with the expectation that the foam would help insulate and seal, but not adhere to anything but the fiberglass. Using that strategy, it would be easier to remove if necessary.

As inexpensive as foam is and as easy as it is to work with, I would think that if it were a "win-win" the industry would be using it more than they do. I'd think it through from all the angles before getting too far along on a project to apply significant amounts of foam under the floor.
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Old 04-02-2014, 06:42 AM   #22
geo
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Quote:
Originally Posted by Terry&Carol View Post
Has any one used spray foam insulation, like what is used in hosing?
Do a search on user "mguay". Mike used spray foam to insulate the underbelly of his Alpine. One needs to protect and cover the toothed rail and many of the connections, wires, hydraulics, and Pex piping. I used Fiberglass, which itself is a mess!

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