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Old 04-17-2017, 11:55 AM   #1
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Concrete Next to Window Wells


Hi All,

I am installing a new concrete patio extension next to an existing concrete patio and my house. I have installed an expansion joint against the concrete foundation of my house taking into consideration a slope away from the house, but I also have a couple window wells and a corrugated drain access tube in my pour area.

What kind of material or expansion joint do I put around my window wells so I can pour concrete there?

Also, should I install an expansion joint on the existing patio concrete or will a control joint in the new concrete be sufficient?

Thanks!
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Old 04-17-2017, 11:55 AM   #2
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Re: Concrete Next to Window Wells


Here is a picture of the work area


Last edited by Quatto; 04-17-2017 at 11:59 AM.
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Old 04-17-2017, 04:46 PM   #3
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Re: Concrete Next to Window Wells


I would create a bit of a gap via some sill plate gasket material or some peal and stick membrane.

https://www.google.com/shopping/prod...FZqNswodw_QEKQ
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Old 04-18-2017, 10:28 PM   #4
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Re: Concrete Next to Window Wells


We use WR Meadow's "Deck-O-Foam" in 1/2" for almost all of our installations around window wells. If you can find the rubber expansion joint, that will follow the radius of the window wells, also.

I wouldn't (won't) install expansion material between new and existing, unless I am expecting the two slabs to move independently, and "hinge" a lot at the joint.
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Old 04-19-2017, 01:26 AM   #5
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Thanks a ton for the tips. I've used that deck o foam against the house and I will certainly look at putting it around the window wells then.

How do you get it to sit flush to the window wells? I used liquid nails to secure it to the house, but I'm not sure how to best secure it around the window wells.

Thank you so much!
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Old 04-19-2017, 08:58 AM   #6
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Re: Concrete Next to Window Wells


why not remove the window wells instead ? from the pics, they're not doing much good
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