something about insulation?

in one of my fishing boat I want to rebuilt a cold room. to make a long story short I had to remove the bottom on my cold room, back to the steel of the hull, frames etc in order to proceed with some repairs.
Now it is time to rebuilt the whole thing but where I live I cannot find one contractor who spray polyurethane foam High density..
My idea is to use the small block of the foam I have removed in the first place , compact them in the bottom of the boat and then pour a very liquid cement in order to have a sort of binding agent. It will be very fast and very cheap to do so.
the question is : will it be efficient as far as insulation is concerned?
Polyurethane is a good insulation agent; what about polyurethane mixed with cement; will it retain some insulation properties?

please comment and give it your best shot.. thanks

Your idea would work, However the cement may chip up/break apart. What about getting some foam sheets 1" thick and build it up to the thickness you need and use 5200 marine adhesive to glue them together. Then mix some resin with matting and/or cloth for the finished fiberglas floor.
The foam I am talking about is the cream colored with a foil sheet on the out side. We built bait and fish boxes out of them then fiberglas them up nice and lite yet strong..

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One Response to something about insulation?

  1. urch 55 says:

    Your idea would work, However the cement may chip up/break apart. What about getting some foam sheets 1" thick and build it up to the thickness you need and use 5200 marine adhesive to glue them together. Then mix some resin with matting and/or cloth for the finished fiberglas floor.
    The foam I am talking about is the cream colored with a foil sheet on the out side. We built bait and fish boxes out of them then fiberglas them up nice and lite yet strong..
    References :