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Boat House
Water absorbing foam below deck
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<blockquote data-quote="Vol423" data-source="post: 492253" data-attributes="member: 6621"><p>Polystyrene foam (the white stuff) will absorb 70-90% of its volume. Polyurethane about 5%. The USCG mandates polystyrene in the bottom 2" next to the hull because polystyrene won't melt in gasoline. I would ignore that and use all polyurethane if you're going to replace foam. Or get a boat over 20' long and the USCG has no purview and no flotation needed. But it will sink if flooded.</p></blockquote><p></p>
[QUOTE="Vol423, post: 492253, member: 6621"] Polystyrene foam (the white stuff) will absorb 70-90% of its volume. Polyurethane about 5%. The USCG mandates polystyrene in the bottom 2" next to the hull because polystyrene won't melt in gasoline. I would ignore that and use all polyurethane if you're going to replace foam. Or get a boat over 20' long and the USCG has no purview and no flotation needed. But it will sink if flooded. [/QUOTE]
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