Posted by David Sherman on Sunday, October 28, 2007 at 20:58:16 :
In Reply to: Re: Insulation suggestions? posted by MoparNorm on Sunday, October 28, 2007 at 18:32:23 :
The contact cement takes care of the gap on one side (the outside in my case), but how do you eliminate the gap on the inside? Styrofoam isn't compressible, there has to be some gap between the inside lining and the foam. The advantage of the fiberglass is it fills the whole space to some extent, but as I can see after taking things apart, there's been lots of condensation for a long time. The inside metal seems to have been primed with red oxide or red lead primer, but not top-coated, and I'd say about half of it is very rusty.
If I have to have only one face glued to the metal, I'm thinking it should be the outside one. That's the cold side, so that's where the condensation would be a bigger problem. The inside is normally warmer than the outside (or it's the same temperature), so it would tend to stay drier, so that's the better side to have the gap on. Sound right?
Even when you're building a freezer, I don't think you can get the tolerances so tight that there's no gap between the styrofoam and the walls. Do you try to glue it with contact cement to both walls? Isn't it pretty hard to get the second wall in place properly?
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