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nagmay t1_jadjii3 wrote

Anything less than an 1/8" shouldn't be a problem, but a full 1/4" could be an issue with your drywall.

First, do your best to identify which studs are the issue. A long level (at least 4') will help to identify find highest/ lowest point. Take care of those first, and then reevaluate. Cutting/sistering or replacing a single stud might take care of most of the problem.

Alternatively, you can shim out all the surrounding studs. Tedious, but often the quicker option. These work well. Or, thick felt paper.

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Warsaw14 OP t1_jadl01m wrote

Thanks! Am I correct that I likely used studs that had too much crown here? I wanna pinpoint whatever error I made to improve in the future. I’m pretty sure the studs that are “low” are the issue. Everything is plumb, I did check with a six foot level and a plumb bob. Wouldn’t just shimming out the few studs in this case be the easiest route overall?

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nagmay t1_jadqnl4 wrote

> Wouldn’t just shimming out the few studs in this case be the easiest route overall

Yes- in my experience, it is much easier to shim a few than to grind/remove a stud that is bowed out. No need to get them perfect, just within 1/8" for flat drywall.

As for the why, there are two things to help in the future:

  1. Watch out for large bows when selecting lumber. The stuff from the big box stores can be really bad. Sight down each piece as you select it.
  2. Match all the bows into the same direction when building the wall. You won't notice if all the lumber bows out 1/8" in the same direction... but if one bows the opposite way, you now have 1/4" to deal with.
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Warsaw14 OP t1_jaeg8e7 wrote

Quick clarification, you mentioned large bows but did you mean crown?

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nagmay t1_jaeli54 wrote

Potato/Potatoe

It is regional, but I usually refer to "crown" when referring to joists and bow when referring to studs or raw framing lumber.

In example: Joists should always be crowned up. Studs can be bowed in either direction, but the direction should be the same for all the studs in a single wall.

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