[Greenbuilding] foam in a can

[George J. Nesbitt]

    Can foam will work just fine. I installed a new 80 gallon Rheem 
solar storage tank last spring and was disappointed in the lack of 
insulation on the top of the tank. Adding rigid foam to the top would be 
a good thing to do unless it is a gas tank with natural draft vent.
    With the frig just be carefully not to insulate over the coils, they 
are sometimes in the sides, but probably on the back on an older model.
    I have insulated the underside of a cast iron bathtub with spray foam.

Reuben Deumling wrote:

>For purposes of filling gaps in the insulation of a new water heater I'd
>like to use a foam that exhibits a high R-value per inch when cured. This is
>a rather small volume we're talking about. Can I use pretty much any product
>or are there pros and cons relevant to this application?
>
>I own a foam gun for the Great Stuff Pro cans, but I'm not sure that product
>line is well-suited to this purpose.
>
>One of these days I also hope to re-insulate an old refrigerator with
>something similar. The walls on it are all roughly 3" thick, and I expect
>I'll want to send the foam in with as long a nozzle as I could get. Perhaps
>this is a different or not even feasible project. Total volume for this
>project would be about 8 cu ft.
>
>All thoughts welcome.
>
>Reuben Deumling
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