Drywall patch that disappears: California patch, setting compound, and feathering

@garage_gabe · Sep 29, 2026 · 1.1k views
Difficultyeasy
Time2 hours over a day
Cost$10

For holes up to 6": cut the hole square, cut a drywall patch 2" bigger all round, score and snap the back paper off the margin leaving the front paper as a built-in flange (the "California" or "hot" patch), butter the hole edges with setting-type compound (the 20- or 45-minute powder, not premixed), press it in, skim over the flange. Two more thin coats, each wider, sand lightly with 220, prime before painting or it will flash. Setting compound does not shrink; that is why the patch does not telegraph through.

#drywall#patch#california-patch#setting-compound#home-repair

46 💬 10 comments

10 comments

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@drainpipe_dave 21d ago

Upvoted for the safety notes alone.

14
@garage_gabe OP 21d ago

Should be the same procedure, the part moved slightly but the steps match.

0
@voltbike_val 20d ago

Nice. What did the whole thing end up costing you?

8

Bookmarking. I have exactly this problem and was about to pay someone.

8
@crucible_carl 22d ago

Question: do you need to disconnect power for this or is it safe to leave it plugged in?

6
@garage_gabe OP 21d ago

Right around what the post says, give or take shipping.

4
@applianceandy 22d ago

Tried this over the weekend and it worked first time. Thanks for writing it up properly.

6
@moldmaker_mina 22d ago

The "what went wrong" section is the most useful part of this. More people should do that.

4

The "what went wrong" section is the most useful part of this. More people should do that.

2
@garage_gabe OP 21d ago

Yep, same here. The second time is always faster.

7

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