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Discussion Starter · #1 ·
Hello again.

Working on my plans to finish the basement and am going to use 2" XPS direct on the foundation with 2x4 walls pressed against the foam and finally 1/2 drywall.

The stairs coming in the basement are right up against the foundation. How would ever finish off this wall?

Here are some pictures....
 

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Discussion Starter · #5 ·
The left side of the stairs is against the foundation. The drywall you see at the top of the stairs was done by the builder and is above grade. The drywall on the right side is a wall separating the stairs from the basement. The basement is unfinished.
 

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not much to choose from maybe glue some 1/2 inch foam board seal tape seams then hang 1/2 drywall or better yet densglass where poured walls are at using tapcons
 

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Discussion Starter · #7 ·
wont i have o move the stairs off the wall at least a 1/2 in to get a full moisture barrier? I though having that wood direct on the foundation would be a bad idea.

Interesting the builder would do this. The house is 1.5 yrs old.
 

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Some situations call for compromise. This is where you tell yourself, :whistling2:, moisture barrier is more important than the insulation.
About the same as previous poster advised, although you can also put 1x furring strip, pressure treated, 24" o.c., foam panel in between, then cover with sheetrock. I used denseshield myself, but it needs to be skim coated before painting due to fibermesh skin.
 

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Is the concrete wall against the garage fill or a crawlspace? Or is it partially above grade? Or an exterior wall? Where are you located?


Gary
 

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I had a pretty similar situation (maybe even tighter) and the inspector let me fasten the drywall directly to the block wall Which I did using cement nails. I did this being moisture wasn't a problem and that wall would be slightly warm than an outside wall.

As previously said, sometimes you have to compromise. Yes, if you could snap your fingers and make it 100% correct you would.

B
 

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I have this same situation in my home and I 'm not sure what to do either. Hopefully someone here has done it and can shed some light on it for us.

On a side note: I don't think you should be spending money putting pink xps on an interior wall.
 

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Discussion Starter · #16 ·
I have this same situation in my home and I 'm not sure what to do either. Hopefully someone here has done it and can shed some light on it for us.

On a side note: I don't think you should be spending money putting pink xps on an interior wall.
The pink xps is just to keep heat under the stairs. That's were my wife starts here plants for the garden. It will be coming down.
 

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The reason I asked if against fill dirt and interior is the wall should remain at 50-55* and dry. The foamboard, at 1/2" thick (R-2.5) would not have condensation until 68% RH at 70% interior temperature. If you ever have that much, wear knee boots when descending stairs...

Gary
 

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Discussion Starter · #19 ·
The reason I asked if against fill dirt and interior is the wall should remain at 50-55* and dry. The foamboard, at 1/2" thick (R-2.5) would not have condensation until 68% RH at 70% interior temperature. If you ever have that much, wear knee boots when descending stairs...

Gary
Thank you sir. I think i can make 1/2" xps and 1/2" drywall work.

Should i remove the staircase to do this or just work around it?
 

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Thank you sir. I think i can make 1/2" xps and 1/2" drywall work.

Should i remove the staircase to do this or just work around it?

get 1/2 treated plywood and rip it to 1 1/2" strips, nail strips to wall and fill between strips with the foam and then go over that with the drywall screwing it to the strips. your drywall will cut to fit the angle going down the stairs on top of the stair skirt. finish it out on top where the builder already put drywall with a backband/shelf type effect or run the 1/2" strips up the entirety of the exterior wall over top the drywall and put the new drywall all the way to the ceiling...
 
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