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Old 08-01-2020, 04:40 AM   #1
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Butting drywall


On occasion I've seen drywall hung so that the tape has to be mudded in over two adjacent and non tapered edges. Not good. So I've always wondered if the paper facing couldn't be cut away and an "in situ" tapered created. Messy of course, but I've seen mud covering greater sins!
Anyone tried this?
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Old 08-01-2020, 05:52 AM   #2
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Re: Butting drywall


I'd be leery of doing that. The paper protects the gypsum from the moisture in the mud. It's commonplace to finish butt joints out wider than than factory joints, 16"-20" is the norm.
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Old 08-01-2020, 07:00 AM   #3
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Re: Butting drywall


Like Mark says, you need the paper face of the drywall intact. If you put tape on raw gypsum, it'll crack in time.



But what you can do is use a butt backer. These were in common use out west. They are very slick and I'm surprised they aren't in wider use.


https://www.trim-tex.com/products/ov...rywall-backer/
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Old 08-01-2020, 10:04 AM   #4
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Re: Butting drywall


You've seen this "on occasion"? All drywall jobs of any size require butt joints. I would definitely go further than mark and not say that I'm "leery of it", I'd say you absolutely can't do that. Drywall gets is strength from paper. (If you doubt that, remember how drywall is cut - you simply cut through the paper layer, and the drywall literally cuts itself in half simply under its own weight.)


Marson nailed it - the "in situ" process for creating tapered joints with butts is not to alter the drywall, but to change the alignment. Simply bend the butts back and screw them in place. The technique is also known as "back blocking" if you want to google that. There are handmade butt backers, and expensive ones you can buy. Both work. This is required if you absolutely have to have a perfectly straight wall. Or if you simply like mudding tapered joints.


Here is one way to make your own.
https://www.finehomebuilding.com/199...ll-butt-joints



Here is another acceptable way to do it, although I find this a little crazy.
https://www.familyhandyman.com/proje...nts-made-easy/

Last edited by jeffnc; 08-01-2020 at 10:11 AM.
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