1/2" plywood for furring strips

[megrilla]

So between my basement stairs and my concrete wall, there isn't much room. I've been thinking of putting 2" foam, ripping 1/2" plywood strips for furring, and 1/4" drywall.
Unfortunately moving stairs or making them narrower is not an option.
What the thought on this?

[Splinter Puller]

So between my basement stairs and my concrete wall, there isn't much room. I've been thinking of putting 2" foam, ripping 1/2" plywood strips for furring, and 1/4" drywall.
Unfortunately moving stairs or making them narrower is not an option.
What the thought on this?

I would glue the foam (extruded, not expanded) to the concrete and then glue the drywall to the foam.

[Cooler]

There are engineered solutions for that.  They probably cost more than you solution, but it is a small space, so likely not too much expense.

I had seen one system in a youtube video, but it appears that there are multiple options out there.

https://www.google.com/search?client=fir...all+panels

This video shows an installation on one of the products.

https://www.insofast.com/lc/basement-wal...anels.html

Very fast and no special tools.

[crokett™]

I would glue the foam (extruded, not expanded) to the concrete and then glue the drywall to the foam.

If you do this, devise a clamping method if you want flat drywall.    Perhaps you can use wedges between the drywall and the basement stairs, or something like that.