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Old 11-08-2018, 07:17 PM   #3
Art
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City: SF Bay Area
Vessel Model: Tollycraft 34' Tri Cabin
Join Date: Feb 2011
Posts: 12,569
Some boat builders use rigid closed cell foam as interior mold for building very thick fiberglass overlay into the thick hull itself. Never need worry about moisture touching the inside of stringer; nothing to rot.
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