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
very interesting answers in general. one of the reason why I want to pour cement in the hold is to fill up nicely all the voids. I am already using a lot of polyurethane spray foam to fill all the gaps and minor crevasses. What i found interesting in all your answers is the fact that cement mixed with foam seems to be a decent insulation product. I am fishing tuna and I have a 3 tons ice machine but i want to keep a good insulation nevertheless in the hold
thank you great job
It should retain insulating properties, cement conducts heat, but much less than steel or aluminum. If most of the surface area is the foam, you should be okay from an insulating standpoint.
The concern I would have is excess condensation from places where the insulation is less. I’d suggest trying something similar on a small scale before modifying the boat. (Perhaps making a two-foot square model of what you’re attempting. You could use dry ice to get the internal temperature cold enough to imitate what you’re trying to do.)
It should retain insulating properties, cement conducts heat, but much less than steel or aluminum. If most of the surface area is the foam, you should be okay from an insulating standpoint.
The concern I would have is excess condensation from places where the insulation is less. I’d suggest trying something similar on a small scale before modifying the boat. (Perhaps making a two-foot square model of what you’re attempting. You could use dry ice to get the internal temperature cold enough to imitate what you’re trying to do.)
References :
lay down the block but leave about a one inch gap between the blocks.cover gaps with duct tape. at the lowest points and highest punch small hole in tape. use cans of foam to fill spaces starting at the bottom (left side or right side) when foam comes out top hole plug it.
References :