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Old 05-04-2011, 06:23 PM
 
432 posts, read 2,306,579 times
Reputation: 369
Default Sealing up utility hole in side of house

I recently moved into a single-family house. I'm working on better sealing of exterior cracks, etc.

There is a significant hole in the side of the house near the heat pumps where the lines enter the house. I can see some insulation. It definitely needs to be sealed up. I'm surprised the previous owners allowed it to deteriorate in this manner. I can see some of the insulation. I hope it doesn't have mold on it.

What is the best method? Expanding foam? More insulation? Caulk? It seems like a fairly significant hole, something larger than my hand.
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Sealing up utility hole in side of house-img_7671.jpg  
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Old 05-04-2011, 06:34 PM
 
Location: USA
1,174 posts, read 728,151 times
Reputation: 1577
Quote:
Originally Posted by Bass101 View Post
I recently moved into a single-family house. I'm working on better sealing of exterior cracks, etc.

There is a significant hole in the side of the house near the heat pumps where the lines enter the house. I can see some insulation. It definitely needs to be sealed up. I'm surprised the previous owners allowed it to deteriorate in this manner. I can see some of the insulation. I hope it doesn't have mold on it.

What is the best method? Expanding foam? More insulation? Caulk? It seems like a fairly significant hole, something larger than my hand.
I found the Expanding foam works best in all temps!
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Old 05-04-2011, 06:55 PM
 
Location: West Michigan
12,142 posts, read 21,562,311 times
Reputation: 16183
It looks like they had a sill plate of some sort on it at one time, but it was either removed or fell off. I would put a bit of low expansion spray foam directly in the hole and then cap it with another sill plate.
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Old 05-05-2011, 01:08 PM
 
Location: The Triad (nc)
17,195 posts, read 21,839,868 times
Reputation: 14271
"Duct Seal"
A small block is about $2us at Home Depot etc in the Electrical dept.
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Old 05-05-2011, 03:21 PM
 
4,919 posts, read 10,116,526 times
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Before sealingt he hole, if it was me, i would first do a insopection of each of the itemns to make sure they were not damaged from resting on the siding. next I would install a plastic/fibergalss shield so the items are properly resting on a suitable surface. Some of the ones the local hardware carries also have a top part so you can seal the area correctly and not just shoving in some thing to fill a hole. They also sell ones that are shoved up under the siding above to form a seal and cover against water penetration. If it was me i wouldn;t just shove or spray stuff in the hole because that's what it lookes like someone did before.
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Old 05-05-2011, 06:08 PM
 
Location: Johns Creek, GA
6,647 posts, read 20,724,030 times
Reputation: 5143
Seal it with minimal expanding foam-
Use a weather hood to keep rain from penetrating to the inside of the wall cavity.
Something like this-


As you can see between the 2nd and 3rd unit. Sheetmetal supply places usually have these specifically made for this application- Not a converted dryer vent or fart fan vent.
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Old 05-07-2011, 09:08 AM
 
41,634 posts, read 44,854,191 times
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That loks like metal siding. If so you do not want the copper lines sitting on another metal such as steel because it will react when wet and evetually corrode a hole in the line from electrolys.
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