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Old 11-23-2010, 06:50 PM   #1
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Insulating interior wall outlet


I need to insulate the light switches in my house that face opposite the exterior of the house. I know there are foam inserts that can be placed behind the switch plates that will help with that but what about expanding foam inside the box? Is it a workable solution? How should it be applied? Finally is this just creating a problem if the switches ever need to be replaced?

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Old 11-23-2010, 06:53 PM   #2
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Insulating interior wall outlet


Why insulate on an interior wall ?
You need a specific foam & you can't really fill the box at all

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Old 11-23-2010, 06:57 PM   #3
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Insulating interior wall outlet


The foam cannot be sprayed inside the box.

SD, I think the OP means the boxes are on outside walls and face inward.
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Old 11-23-2010, 06:58 PM   #4
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Insulating interior wall outlet


Why worry about an interior supposed problem when there are better things to do to make the envelope more efficient and eliminate the need to chase possible interior problems?

Without knowing your location (climate) and construction and a lack of a specific problem it is hard to give advice.

Technically, an interior outlet is within the building envelop, so arbitrarily using insulation materials could never be justified and may cause other problems.

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Old 11-24-2010, 01:04 AM   #5
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Insulating interior wall outlet


Quote:
Originally Posted by flyfisher View Post
I need to insulate the light switches in my house that face opposite the exterior of the house. I know there are foam inserts that can be placed behind the switch plates that will help with that but what about expanding foam inside the box? Is it a workable solution? How should it be applied? Finally is this just creating a problem if the switches ever need to be replaced?
If what your saying is that this is an exterior wall, but with outlets on the inside of that wall, inside the home, then yes, foam can be used around the outside of the boxes, but never any inside the boxes. If it is interior, as others said, it isn't worth it to insulate on inside walls unless there is some special application like a sound proof wall.

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