Waterlogged core

[Moody Blue]

Please offer any advise you might have. I have a foam cored fiberglass boat (whaler style) that seem to be waterlogged. I want to cut out the floor in panels, remove the old foam, pour in two part expanding foam and them glass the floor panels back in place. Am I crazy or is this a practicle approach ? ANY help you can provide would be greatly appreciated.

Rod

[lprimina]

that is the only way really, Tear out and replace... I repaired a flat bottom boat and didnt put any foam back. made sure the water could drain out tho

I had a tri hull Four Winns 17' that was water logged. i carefully removed the decking (as to not damage the sides of the hull. Then I used a spatula to re4move the water logged foam core. Seventeen lawn leaf bags later I had a clean hull. After I had cut new pieces of decking and fittted them into the hull.
I removed them and coated them with Resin and Hardner with around 50% styrene added. I used a paint roller to coat the top, bottom and edges of the plywood so that it would be sealed from moisture. Then I screwed the pieces to the stringers. I raised the trailer jack untill the back of the boat was almost on the ground. drilled a hole every 18" from front to back between the stringers. strarting at the rear I poured the foam mixture so as to continue the filling process .and not over fill the foam and cause a blowout.
trim the foam that squirts out of the filling holes so that it is smooth and re-glass the bottom of the boat. there you have it add carpet and gas and go.

Hope this helps