1) Did '70ish model Sunfish Boats come w/ open cell floatation foam inside the hull?
I done some inside the hull inspection on the rear end of mine.... and there's some foam that looks like a Styrofoam cooler (white, closed cell foam). Seems some ants invaded the white foam, and have eat it up quite a bit.... and nested in it - so I am removing it to add new foam..... But, the white foam was held in place by some "yellow" foam.... which looks like the spray insulation foam (open cell) which you can get at Lowes. The yellow foam, was retaining water - thus I am replacing it as well (it's going to be a real task, I can tell). I haven't gotten into the front of the boat yet to inspect that end (and I'm dreading it).
2) I though boat builders used closed cell foam, so it wouldn't absorb water. Any thoughts? or does the closed cell foam break down over time, then absorb water? Trying to figure out why it's waterlogged (besides the fact of a small crack in the hull, that I'll be fixing).
3) Can anyone recommend any "new type" yellow foam, to ahdhere the white floation blocks into place (that won't become waterlogged over time)?