Patching drywall - tapered edge


Old 05-12-15, 08:04 AM
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Patching drywall - tapered edge

I've patched a number of holes over the years, but mostly smaller. I just had to patch a 4'x5' hole in my bathroom. None of it meets the floor, side wall or ceiling.

For the life of me, I couldn't figure out why there was such a big gap between the patch and the drywall next to it (both are 5/8"). Then I measured the edge and realized it is less than 1/2" because it is the tapered edge.

Is the takeaway that you cut off that tapered edge when making a patch that doesn't hit the ceiling? How much do you have to cut off to eliminate the problem of alignment with the next sheet (which I cut to make the hole)?

Do I have to redo this patch? Can whoever tapes and muds it adjust for the difference in heights?
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Old 05-12-15, 09:19 AM
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You/they can prefill the low spot to make it level. Ideally the patch piece would fit better so you can skip that step.
Old 05-12-15, 10:08 AM
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The tapered edge is desirable and makes room for the tape. It is the untapered edge that makes the job more difficult as you must be careful to not add too much mud.

Where a large patch aligns with the old drywall, if there isn't a stud to attach both edges to you should add a backer board, 1x3 strapping or similar piece. Although 5/8 drywall is rather sturdy. But just tape and fill the taper as you would do on a new wall.

Old 05-12-15, 11:12 AM
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The tapered edge is designed to be filled with tape but when you have a tapered edge butt up to a non tapered edge, many find it easier to prefill and make it level before taping. I've taped them both ways.

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