foam deteriorated in hull

Correct me if im wrong but the problem is if you fill the entire hull if you get water in there its staying in there. From what i see is if you have a leek the foam will absorb it slightly and you cant drain the water so your putting a walking time bomb on your hobie.

You are correct.

There once was a catamaran called a "Sizzler":

It was all aluminum, and filled with foam.

It didn't take long before they became waterlogged and very, very heavy. They (and the company that made them) did not last very long.

Matt,what do you to repair small hair line cracks on the deck.The deck feels solid but those cracks look bad.

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Bill 404 21SE

The "standard procedure" would be to rout them out with something like a Dremel tool, fill them with thickened gel-coat, then maybe spray a thin coat or two of gel over the area to help with the cosmetics.

It's a lot of work for a cosmetic repair, and if the gel is anything but white, you'll have a hard time matching the color.

There must be a foam specifically made for the marine environment. I have not done any google searches but professional marine repair facilities must have a expanded foam product they use. Also, couldn't you lay say a 1" soft Polly tube down the length of the hull before installing the foam, if you drilled holes down the entire length it would act like weeping tile around your foundation and drain all the water to the transom where the drain is.

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06 getaway -- always remember, man with both feet in mouth have no leg to stand on.