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lokisince89 02-27-2013 06:48 PM

Working with 1/4" dry wall
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I have a 1942 Sears kit home and all of the remaining original walls are plywood. As I have done remodeling I have removed the ply and replaces it with dry wall.
I am now working on a small hallway that is 3' wide 8.5' long and 8' tall- with (believe it or not) 6 doorways in it. My main project in the area is to replace all the door trim since the existing has 70+ years of paint fouling it. While I have the trim off- door and floor, it occurred to me that it may make sense to pull off the plywood and replace it. If I use 1/4" drywall I won't need to replace all 6 of the door frames- 1/2" will leave the wall proud of the existing frames.
My concern is that I've read that 1/4" drywall is really only for covering damaged paneling or drywall. On the other hand the space I am in so broken up with doors that I don't know if there is space for the drywall to sag. The north wall (3')has a door and only 14" of wallspace. The south wall (3') has a door and 6" total wallspace. The east wall (8.5') has 3 doors and 24" wallspace. And finally the west wall (8.5') has one door and 5.5' of running wallspace.
Sorry this is so long and so many measurements but I'm really torn on what to do- thanks.

ToolSeeker 02-28-2013 06:35 PM

My first reaction is to say no because 1/4" has no strength and if someone hits or bumps it you have a hole. But since this is a small area you may get away with it if you add quite a bit of cross bracing- horizontal-between the studs.

joecaption 02-28-2013 07:04 PM

Why are you removing any of the plywood?
Just go right over it with 1/4 drywall.

If you leave the drywall 2" from the rough open the trim will still work with just a little bit of caulking needed on the outside of the casing, no jamb extention needed.

gregzoll 02-28-2013 07:16 PM

Someone sure did a good job in building that house on its side, along with attaching all objects so that they do not move or fall.

joecaption 02-28-2013 07:25 PM

Must be why they used plywood so the pictures could be screwed to the wall.

Gary in WA 03-01-2013 08:55 PM

May need to check the fire-rating of the 1/4", needs wood/plywood or other under it for safety. USG says use only in multilayer systems or on solid surfaces; Table 3;

There is a reason it's not in the code:


AllanJ 03-01-2013 09:07 PM

Quarter inch drywall is for building curved walls or substituting for a skim coat of plaster. You would use at least two layers on bare framing.

Even with bracing behind it, one layer of 1/4" drywall is still fragile.

drywallfinisher 03-03-2013 08:53 AM

1)pull your trim and base leave the crown molding alone.
2)replace the trim around the doorways.
3)hang the quarter inch over the plywood, bumping it into the the door trim and crown molding.
4)finish the sheetrock flat taping next to the trim if necessary.
5)Caulk and paint.

this is the easiest way and the only issue you should have is the base molding where it meets the door trim will be off a 1/4 inch. You'll need extensions for your electric boxes.

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