spray foam insulation in a shipping container

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damn the internet, now I'm reading about gas off issues and chemical desensitivty or some such thing especially when this stuff isnt applied correctly. Think I might give it a miss now :confused: Maybe cut some large vent holes in the sides instead :)
 
You'll only get condensation if you have warm moist air - exactly what are you really hoping to use it for? (as if we didn't know). :rolleyes: :rolleyes:
 
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All you have to do is make a thermal barrier between the metal and the air. Even a thin layer of polystyrene would do that.
 
wreckedit said:
All you have to do is make a thermal barrier between the metal and the air. Even a thin layer of polystyrene would do that.
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I guess thats why those roofing sheets have like a flock coating beneath? Strange thing is, where I am theres some newer containers that dont condense but I'm unsure why - they dont seem to be any different from the older ones except they are vented - maybe this is where I'm going wrong. Anyway I've decided to cancel the spraying now...
 
You will need a vapour barrier on the inside of the insulation.
 
mysteryman said:
You will need a vapour barrier on the inside of the insulation.
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I think that would be the case of insulating building materials were there is a possibility of damp air getting through to the insulation. As it would be fitted to a non-permeable material, metal, there would be no need for a barrier.
 
All air contains moisture, unless uyou go to that desert in the U.S. where it hasn't rained for the last 50million years. :D
 
But it only condenses with temperature differential.
 
joe-90 said:
But it only condenses with temperature differential.
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I'll go along with that, but if he's not going to keep it in a temperature controlled enviroment, he's onto a looser, :LOL: :LOL: there again this is Britain where the sun dont shine! :LOL:
 
You need a vapour barrier on the warm side of the insulation. Somewhere in the thickness of the insulation will reach dew point. Condensation will occur. The insulation may end up waterlogged.
 
mysteryman said:
You need a vapour barrier on the warm side of the insulation. Somewhere in the thickness of the insulation will reach dew point. Condensation will occur. The insulation may end up waterlogged.
Click to expand...

That is truly fascinating. Where does it say that then.?
 
It will reduce condensation but not remove it completely.. Add some vents as well to get a more ideal situation..
 
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