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Floatation for Snipe dinghy


New Member
I just bought a fiberglass 1970 Snipe. It is a completely open haul without any water tight cavities to help with positive flotation. There are a couple of blocks of old crusty foam in it but it looks like most of it is missing. I will be taking the rest of it out but I need a plan for adding new floatation. Does anyone have any ideas or experience doing this on the cheap?

So far, I think my best bet is to pull up the cockpit boards and pour expanding foam in where ever I can get it. Based on the weight of the boat I think I am going to need about 10 cubic feed of 2lb foam. Does expanding foam adhere to whatever I pour it onto or am I better off making some plywood partitions to hold it it place?