foam questions?

[standupguy619]

so I defoamed my ski had about 30 lbs of water logged foam in it. im about to got back together with it and i've been looking at different ways to fill in the trey. thought about running glass vertically in the trey for support in kinda like a honey comb for support . i think that might not be what i wanna do . My next thought was doing styrofoam but im having trouble getting blocks of it . spent all morning and early afternoon trying to find some with no luck. looking on the X i've seen foam, styrofoam , ping pong balls and just glass reinforced . what are some other good ways to do it ??? let me know. im installing drain plugs on the back so in i ever get water back in the trey i can drain it easy. I'm also on a small budget as well haha cheap as possilbe . If all else fails ill just 2 part foam it again but i dont really want to do that do to water logging . Is there a way to make foam drainable? let me know thanks and my "project" in the superjet forum under my first superjet.

 

[loictahiti]

you can find styrofoam at Home depot in pink color , i take 3 panel in 2 inches and 2 panel in 1 inch, for $110

 

[BrightE's]

I'm refoaming with EPP, won't spoil if it contacts gas or other solvents. A bit more pricey, but bound to last longer.

 

[bware52]

I'd put a nice thick layer of flex seal in the whole tray, 2 part foam inside that, and then flex seal over the foam so its all completely sealed.

 

[DEVIN]

im going to be using wifle balls

 

[NVJAY775]

I'll try and find my old build thread and post it for ya. I did a combo of extruded polystyrene (pink sheet from Home Depot) on the bottom for draining and used 4 lb 2 part foam from us composites.com over it. Worked awesome.

Edit: Here's a link to ponder. It's a couple years old, but I still dig the foaming technique. Hope this helps give you some ideas.
http://www.x-h2o.com/threads/88935-Roundie-refurbishing-on-the-cheap&highlight=

 

[Kawy750]

When doing footholds can I just spray "great stuff" in to fill any voids behind the holds?

 

[BrightE's]

When doing footholds can I just spray "great stuff" in to fill any voids behind the holds?

Nope, be careful not to use that stuff. It has no place in any marine applications and will absorb water like a spunge. Find some 2 part foam over at US Composites.

 

[BrightE's]

http://www.uscomposites.com/foam.html

 

[Kawy750]

Thanks!

 

[NVJAY775]

Get the 4 lb foam. It will deal with our abuse.

 

[SuperSteve]

the US composites foam will absorb water just like the factory. I would either use the industrial pong balls or XPS. I didn't use any foam at all in my build!

 

[Vumad]

When doing footholds can I just spray "great stuff" in to fill any voids behind the holds?

Absolutely not.

 

[BrightE's]

the US composites foam will absorb water just like the factory. I would either use the industrial pong balls or XPS. I didn't use any foam at all in my build!

I don't think he is talking about refoaming the tray, just filling in foothold voids above the bond line. The two part US Composites urethane should be fine.