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floatation foam

It's hard to believe that will all the products that have been invented, that there still isn't a light weight foam around that doesn't become water-logged.

-Chris
 
Im not arguing but I have always heard the opposite and I know for a fact that a friend of mine had a boat sink and they had to recover it which is a dnr policy and his insurance company inspected the boat for ALL factory safety equipment. he hadn't messed with it at all being it was a newer boat.
 
I would like to mention that most foams that are of 2 lb density or somewhat higher absorb water like a sponge seeing that they were designed to be used for Buoyance / flotation , fill gaps , ect , unless they are used in cell form , and to tell you the truth in my own opinion , and dealing with past experience 90 % of the boats that i have worked on........ in the past................ that have had .......foam used in the build of the boat have all had major issues structurally that needed to be addressed stringers , core , ect , ect , and personally would never re-consider using foam again unless otherwise specified .
 
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maagee79 said:
Im not arguing but I have always heard the opposite and I know for a fact that a friend of mine had a boat sink and they had to recover it which is a dnr policy and his insurance company inspected the boat for ALL factory safety equipment. he hadn't messed with it at all being it was a newer boat.
Click to expand...
Was it new when he bought it? If so that would mean he removed or co-signed on any missing foam. Otherwise not. (Unless somebody did it without his approval. One never knows for certain.)
 
Chris said:
It's hard to believe that will all the products that have been invented, that there still isn't a light weight foam around that doesn't become water-logged.

-Chris
Click to expand...

There are closed cell foams that do not absorb water, Styrofoam is one example, but I'm not sure what ones can be installed by a spray can.
You could buy styrofoam in large blocks, cut it, to fit the space and glass it in. If you were worried that your sealed in foam boxes might start to leak and fill up with water around the open space between the styrofoam and chamber you could drill drain holes, you would get water into the space but it would not be trapped in the foam and would run out, for the most part.
 
I filled my floor with foam. Sometimes I'll be coming around a corner in the river and I hit 4-5 foot swells when I'm going 50 MPH and the motor is trimmed up all the way. Not pleasant. The river is 240 foot deep there. I'll live with the foam.
 
well I had flooring issues on one side of my boat and when I removed that small section, the foam was damp on the outer edges of it and is what caused the floor to rot from underneath, I was lucky it was not bad and was only to that area, I did put some spray foam back in those areas, under the captains chair for added support, reason being that fiberglass only has so much flex to it be for it will fracture and when it does that will be your first problem with water getting in those places in the first place,and if you have carpet down chances are you will never notice that you have cracks in the glass be for its to late, so I took the medium to the foam issue, I left it out in areas it did not need it and used it in the areas for supporting weight to minimize fiberglass stress.
 
I would think any type of closed cell urethane based spray foam would work without holding water. I know in the building industry we can use a closed cell spray foam for a vapor barrier. I don't know exactly how it would hold up in this application, but I think it would work well...
 
well i foamed her up...was thinking for saftey reasons it would be good,if it rots out i can redo it again. thanks everyone this is a great bunch of boaters!
 
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