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Old 01-07-2015, 12:46   #1
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Foam Insulation

Would using spray foam insulation be a good idea in the cabin ceiling walls or else where?

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Old 01-07-2015, 13:55   #2

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Re: Foam Insulation

The label says it's waterproof, I don't really believe that. It seems to fall apart and the mess it leaves is pretty stubborn. If you could spray it into a plastic bag and let it expand into your shape you would be protected from those 2 problems at least.
The best bags around are trash compactor bags. Thicker plastic and good size.

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Old 01-07-2015, 14:08   #3
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Re: Foam Insulation

Works good in house applications, boats maybe not?
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Old 01-07-2015, 14:17   #4
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Re: Foam Insulation


It will also act a bit like glue, so if any of your wiring is in that space, and not in conduits, you'll make it very hard to add new wires or remove old ones. You will render inaccessible all fittings that go through the cabin. If you're lookiing at insulation for temperature control, go to thin closed cell foam batts that you can remove easily with the liner.

Ann & Jim, U.S. s/v Insatiable II, SE Qld, for a while
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Old 02-07-2015, 21:48   #5
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Re: Foam Insulation

Expanding spray foam (that I know of) has formaldehyde in it. There have been illness problems for people living in houses insulated with it. We used it in commercial fishing vessels, and it insulates well, but we sealed it in fiberglass.
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Old 03-07-2015, 05:07   #6
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Re: Foam Insulation

Had it in the walls of one house and about to apply it to the ceiling of our new home. Curing/gasing-off is the only time when one will have a problem with it. Spray foam insulation is big business today in home insulation, it waterproofs, vapour seals, insulates and adds rigidity to any build. And, one does not get itchy!
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Old 06-07-2015, 07:48   #7
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Re: Foam Insulation

You want to use closed cell and fire resistant or better yet fire proof foam. You can paint the foam to try to fire proof the foam.

There are sticky backed insulation that can also be used. Dashew is using it on his boats. You can search on their website for quite a few posts but here is one, SetSail » Blog Archive » Adding Insulation to Wind Horse.

Kasten has insulation information on his website, look part way down this link, Corrosion Prevention

Good Luck,

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