Can spray foam insulation touch A/C?


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Old 05-02-21, 10:41 AM
C
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Can spray foam insulation touch A/C?

I just put in a "Through the Wall" Air conditioner. Kind of like a window unit, but through the wall.

Can I use Spray foam insulation around this?

The spray foam will touch the metal box of the AC unit.

Yes or no?

Thanks
 
  #2  
Old 05-02-21, 11:50 AM
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Spray foam can make removing the unit difficult, almost gluing it in place so you may be cursing yourself in a few years. But, spray foam is good for sealing odd shaped gaps. There are two types of spray foam. I would use the low expansion type intended for around doors and windows. It won't apply as much pressure as it expands so it won't try to distort the AC's housing.
 
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