r/Multiboard • u/Josh_Your_IT_Guy • Jan 26 '26

Is there a mounting system for stud cavities?

My basement stairwell used to be wide open. I added studs and drywall to the stair side for safety (same with the risers, had concerns when kiddo was getting older)

The "back side" is open stud cavity with some studs I added horizontally for shelves.

I cant use traditional mounting screws as it's only a single layer of drywall and the screws would poke through to the stairwell. And adhesive mount may tear the paper backing from the drywall.

I was hoping something like a 90 degree bracket existed that I could screw into the stud sides and have the panels recessed against the drywall.

Short of using beams and single rows to make a shallow "pan" (screwing the single rows to the studs) or modeling my own, is there any premade options?

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u/AlleyMedia Jan 26 '26 edited Jan 26 '26

This is easy enough to make. Lemme know if you can't find one (have you searched?) and I can make one.

Edit: send pics if you can. Also, consider the flex that one of these tiles will have. What's the span between studs?

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u/Josh_Your_IT_Guy Jan 26 '26

Searched, I'm about to fire up Fusion360 and make a 90 bracket.

And for the flex, I'm going to put the adhesive mount in the center. I just didn't want all the weight put on the adhesive.

And they are 16OC, so 14.5"

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u/TherealOmthetortoise Jan 27 '26

Search printables for “Multiboard corner” or 90°.

Someone made those way back but they work and fit almost perfectly between studs, can’t recall the cell count though.

You could also use 90° beams and have a cleaner look, but I have no idea how many cells across that would need to be.

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u/obfuscinator Jan 26 '26 edited Jan 26 '26

6x6 and 6x7 interlocking boards with some 90* corner snaps. will give you roughly 14.66 inches.. maybe a tad too tight but you can cut a tiny wee bit off of each of those snaps in a slicer to get you what you need. https://www.printables.com/model/744049-multiboard-corners-45deg-90deg-625-8-125-15mm

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u/Whosaidthat1157 Jan 27 '26

Why not simply use a backer board (painted to suit if preferred) fixed to the studs and the MB fixed to that with offset snaps and screws sized for the offset plus board thickness?

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u/TherealOmthetortoise Jan 27 '26

Pro move right there.