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Reply to: Autopsy of Hobie 14 Soft Spot Repaired with Great Stuff

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[quote=ecsmoot]I had the opportunity to saw through the deck and hull to view the results of a Hobie 14 deck soft spot repair.  The deck had been repaired five years earlier by a retired engineer who sails at our club.  The boat was finally retired after  damage to the rear hull.  The soft spot was just ahead of the forward pylon.  Each side  had been repaired by drilling a series of quarter inch  holes about two inches apart.  These were filled with Great Stuff foam. A single layer of fiberglass was overlaid and glued into place for repainting. This stiffened up the site  very well.  Before cutting the hull for inspection, I had tried stomping my foot through the repair of the opposite hull.  It was very solid.  The transverse cuts showed the Great Stuff foam had flowed on both sides of the original inner foam.  The spray foam was solid and in good condition. It was adherent to both layers of inner and outer fiberglass and to the original construction foam layer.  The dimensions of the original deck sandwich were 2 mm of outer fiberglass, 4 mm middle foam layer, and about 2 mm of inner layer fiberglass.  Where the Great Stuff foam was injected, some of the total thickness of the reconstructed deck was two inches.  I have some great photos, but I have not figured out how to attach these to this report.[ecsmootmd@suddenlink.net][/quote]

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