ihavenoideawhattoput
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Will this add bouyancy?
I was going to fill all my extra gaps with it.
I was going to fill all my extra gaps with it.
huntinfool said:Adding foam will not increase your bouyancy, unless your boat is full of water. :LOL2: Foam is only to help keep your boat afloat in the event that you take on water.
Ranchero50 said:exactly, closed cell foam will not absorb water (for a while) but most open cell stuff will and over time it'll make the boat heavier vs. without any. The 1/2" blue insulation boards from Lowes are closed cell. Sunk one in the kiddy pool under an anchor for a week and it didn't take on any water so that's what I'm using on my boat. I thought about blow foam, but I want to be able to remove everything to work on it down the road (think river rocks at 50mph...)
Jamie
Ranchero50 said:Be wary around the fuel, actually within 4" of the bottom of the hull has to be fuel proof per CG regs. You can encapsulate the foam board in fiberglass for these areas but it's a real PITA. Another consideration is the floatation should be around the upper hull so the boat doesn't turn turtle as it fills. The idea is that you can stay with the boat even if it floods with water vs. free swimming or holding onto the sides.
There's a lot of good info in the coast guards boatbuilders handbook. It's online, simple search will bring it up.
Jamie
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