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Old 08-06-2014, 11:03 AM   #1
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Cold Air Around a Dishwasher - Insulate?


This is probably going to sound like a strange question, but here goes. Would putting insulation under and next to a built-in dishwasher help stop passage of cold air that is coming through the wall behind the dishwasher and adjoining kitchen cabinets?

Last winter, a lot of cold air was entering the kitchen under and around the dishwasher, to the point of us literally feeling a draft. Obviously the wall behind the dishwasher and the adjoining cabinets isn't as airtight as it should be. Short of taking the exterior siding off the outside of the wall and fixing the air infiltration and insulation problems, I was wondering if it would do any good to put insulation under the dishwasher where the draft was blowing? Is that even safe since the dishwasher gets hot?

Any advice would be appreciated.
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Old 08-06-2014, 11:16 AM   #2
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The cold air will still be entering the house so the best it could do is diffuse the draft so it would be felt elsewhere. A piece of cardboard box the appropriate size would accomplish the same thing.
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Old 08-06-2014, 11:24 AM   #3
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Need to figure out exactly where the airs getting in.
Pull it out and look at the wall behind and floor below it.
Someplace there's most likely an open hole where the drain or incoming water lines where run.
If there was a problem with the wall not sealed or lack of insulation the whole wall would be cold not just that one spot.
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Old 08-06-2014, 12:26 PM   #4
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Insulation insulates. Air barriers block air. If cold air is entering your house from the exterior, you need to seal the hole first. Only then you can apply insulation after that. Some substances (e.g. spray foam) do both at the same time.
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Old 08-09-2014, 09:08 AM   #5
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Gotta seal up the envelope first and foremost like IlikeDirt says.
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Old 08-10-2014, 08:26 AM   #6
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it may not be leaking outside air. it could be inside air, that is not well heated (because its behind the cabinets and DW), that is circulating into the room. just sayin.
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Old 08-10-2014, 08:42 AM   #7
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Quote:
Originally Posted by Fix'n it View Post
it may not be leaking outside air. it could be inside air, that is not well heated (because its behind the cabinets and DW), that is circulating into the room. just sayin.
+1

That being said, most dishwashers are installed with poor insulation and wall sealing.
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Old 08-10-2014, 04:43 PM   #8
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Pull the d/w, foam the open holes, and never ever put insulation under the machine. You may develop a leak sometime and a hidden mold magnet is not what you want in the kitchen.
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