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Old 09-03-2010, 05:41 PM   #1
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Sheet Foam Insulation

Could anyone tell me the difference between sheet foam insulation?
On my last visit to Menards I noticed three different types of sheet foam...White, Pink, Blue...

I'm not interested in the technical information I just need someone in the know to advise me which one would be best in a boating situation...

I'm planing a homemade boat project that uses foam as the boats hull core, with plywood and fiberglass over the hull...(Weight and water retention are my main concerns)
I posted this question here too,6.0.html but there are just getting started and have no one to help me yet.
All help will be appreciated...
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Old 09-03-2010, 10:09 PM   #2
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Perhaps you could check out foam used for docks. match up the specs with what they sell for marine apps and see if something similiar and cheaper at building supply.
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Old 09-04-2010, 10:56 AM   #3
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pink and blue foam are from two different companies who make the same stuff; XPS. you want that for a boat; water proof. white boat is ESP; not water proof.
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Old 09-05-2010, 11:33 AM   #4
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I recommend you do some research on boat building with foam or foam sandwich. You do not want a foam (plastic) that is dissolved by
other products (polyester resin etc.)

Here's a link that may get you further info.

Good luck.
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Old 09-06-2010, 05:48 PM   #5
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i think the foam you need is Polyurathane. Eve more waterproof than the pink/blue.
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