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-   -   Attaching drywall to bottom of stairs (http://www.diychatroom.com/f101/attaching-drywall-bottom-stairs-134577/)

hyunelan2 02-21-2012 09:03 PM

Attaching drywall to bottom of stairs
 
4 Attachment(s)
I read some similar threads, but they mentioned a 3rd support/stringer in the center of the stairs, which i do not have. It appears the treads and risers sit on a 1x12 that is cut out, and attached/sistered to a 2x12.

How do I attach the drywall (5/8 type X) to the underside of these stairs? I'm assuming I need to add some type of support for the center?

titanoman 02-21-2012 09:06 PM

You must have a center stringer (cut-out 2x12). Are your steps spongy in the middle?
The magic of risers I guess.
Only a pro can do this for you.
Wait. Let me look here...

Ply or 1x treads.

1x stringers nailed to 2x that aren't nailed to the studs.

I don't think these stairs were meant to be walked on.

Not to scare you, but this is a dangerous set of stairs that needs to be ripped out and built from scratch.

I don't know why these haven't collapsed yet.

Seriously.

hyunelan2 02-21-2012 09:32 PM

Stairs are boards, not plywood. They don't feel spongy either. Though they don't look familiar, I'm not sure they are dangerous - they would have had to pass inspection when the house was built in 2002? Home inspector didn't list anything wrong when I bought the house in 2009 (though that doesn't mean much). Maybe I need to get my code inspector to give them a look?

coupe 02-21-2012 09:37 PM

if it were me, I'd get some metal angle clips, even simple drywall corner bead, and screw to stringers on both sides. then attach 2 x's on 16"centers from top to bottom and screw drywall to those.

titanoman 02-21-2012 09:46 PM

Quote:

Originally Posted by hyunelan2
Stairs are boards, not plywood. They don't feel spongy either. Though they don't look familiar, I'm not sure they are dangerous - they would have had to pass inspection when the house was built in 2002? Home inspector didn't list anything wrong when I bought the house in 2009 (though that doesn't mean much). Maybe I need to get my code inspector to give them a look?

Where are you?
Those won't pass anywhere I know.

hyunelan2 02-21-2012 09:47 PM

1 Attachment(s)
Suburbs of Chicago. The stair treads are not 1x, they are 2x. The risers are 1x.

titanoman 02-21-2012 09:50 PM

Quote:

Originally Posted by hyunelan2
Suburbs of Chicago. The stair treads are not 1x, they are 2x. The risers are 1x.

I'm sorry.
The pictures are small on a phone.
Back to the "you need a center stringer".
Cut you cut that?

hyunelan2 02-21-2012 09:53 PM

I could cut it, sure. But I don't think that would be the only problem. I'm not sure how I would get it down the stairs to begin with, standard stringers are what, 14 feet long? That's not going to make the turn at the bottom of the stairs. Maybe I could bring it in through a window.

hyunelan2 02-21-2012 10:14 PM

Just checked with a friend whose house was built about the same time as mine (but he's in the NW suburbs, I'm in the SW suburbs). His stairs are constructed exactly the same. 1x12 stringers on the outside of 36" 2x12 treads, all sandwiched between 2 2x12s. Looks like center stringers did not carry over to modern (last decade) building practice?

titanoman 02-21-2012 11:08 PM

Quote:

Originally Posted by hyunelan2
Just checked with a friend whose house was built about the same time as mine (but he's in the NW suburbs, I'm in the SW suburbs). His stairs are constructed exactly the same. 1x12 stringers on the outside of 36" 2x12 treads, all sandwiched between 2 2x12s. Looks like center stringers did not carry over to modern (last decade) building practice?

I don't know. All I know is code in parts of Cali and Missouri.
In your case, treads shouldn't span over 2', and drywall can't.
You should put a center stringer in if you have the knowledge in this area.

BigJim 02-22-2012 01:18 AM

Wow, I have never seen stairs built like that, I don't see how it passed inspection unless the inspector didn't look under the stairs. A 1X12 is not acceptable for the structural stringers of stairs. If you are happy with them and they passed that is your business but it sure wouldn't fly in my house or one I built. The 1X12 stringers aren't sistered, that is a 2X4 nailer to space the stringer off the wall so sheet rock and the skirt board will slide down beside the stringer. It is not intended to add any strength to the stringers.

titanoman 02-22-2012 01:26 AM

Quote:

Originally Posted by jiju1943
Wow, I have never seen stairs built like that, I don't see how it passed inspection unless the inspector didn't look under the stairs. A 1X12 is not acceptable for the structural stringers of stairs. If you are happy with them and they passed that is your business but it sure wouldn't fly in my house or one I built. The 1X12 stringers aren't sistered, that is a 2X4 nailer to space the stringer off the wall so sheet rock and the skirt board will slide down beside the stringer. It is not intended to add any strength to the stringers.

That 2x4 is only making the whole thing even less structurally sound.

May I ask what the rise (ht) and run (dph) are? Under 8 and more than 10 at least?

hyunelan2 02-22-2012 07:26 AM

4 Attachment(s)
Just a few responses to above. I went and looked closely this morning:

The 1x12 is sistered to the 2x12. It is nailed to both sides below each step. Further, the 1x12 does NOT attach to the floor joist at the top, only the 2x12 does. The 1x12s are attached to the 2x12s.

Total rise from top of tread to top of treat is 7-7/8". Tread depth is 10".

Where the treads and risers meet the 2x12s, it looks like they are also affixed with construction adhesive.

some more pictures (the ones with the screwdriver are pointing out where nails are. The last one shows the tip of the nail poking out the 2x12, where it was driven slightly too deep).

CplDevilDog 02-22-2012 07:44 AM

Quote:

Home inspector didn't list anything wrong when I bought the house in 2009 (though that doesn't mean much).


:laughing:

hyunelan2 02-22-2012 08:19 AM

Quote:

Originally Posted by hyunelan2 (Post 859826)
Just checked with a friend whose house was built about the same time as mine (but he's in the NW suburbs, I'm in the SW suburbs). His stairs are constructed exactly the same.

FWIW, I just checked with a second friend with a house built in the last decade. He also has no center stringer.


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