[quote=bradinjax][quote=jalex][quote]They are foam core. I used an alternative solution to the traditional fiberglass repair that was simple, easy and effective on my G-Cat 5.7...
I turned the boat upside down and spread 2-part high density foam as thinly as possible to completely cover the soft areas. It expanded to about 1 inch thick layer and hard as a rock.[/quote]
Can you elaborate on this? You spread the foam on the inside skin through an access port? Or you spread it on the deck itself? I plan on doing the repair soon on my 5.7. Thinking of either trying the injection method, but really want to just cut the top skin off in the affected area put some cloth and epoxy back over the core and then put the skin back on. My area is a lot smaller than the OP. 30 inches seems long[/quote]
My Gcat 5.7 had 4x 6" access ports allready installed. 2 in each hull about 1 foot behind each beam. I turned the hulls upside down and put them on sawhorses as high as possible then "painted" the inside of the hulls under the soft spots with the 2 part high density foam spreading the mixture as thinly as possible. My first try was too thick and expanded into about 3" of foam. I sanded it down. Thinner is better. I ended up with a layer about one inch thick which added almost no weight and now strongly supports what used to be a very soft deck. No prep required. The entire job took 20 mins.
This finished foam material is incredibly durable, light and strong. It is a closed cell foam meaning it will not soak up water like a sponge. I have found this to be a much better option than the traditional fiberglass repair for this application but if it was a structural repair I would still go with fiberglass or epoxy.[/quote]
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