repairing 45 degree joint in ceiling

igneous

I have to fix a problem spot on a 45 degree ceiling joint. The tape is coming loose, but only in a two or three ft. section. I intend to cut out the bad spot; mud in some joint compound, tape, etc. My question is how can I be sure to keep the same joint line from wall to wall? A corner trowel is for 90degrees, so that won't work. Is it pure patience and skill? Just askin.

bjbatlanta

Just my opinion, but corner trowels are useless anyway (I'm sure I'll get some feedback on that). Cut out the bad section of tape, apply mud to both sides of the angle with a 4" or 6" knife (whichever you have), crease and set the new tape in place, wipe the excess mud from each side to embed the tape. After allowing to dry fro 24 hrs. apply a coat of mud over one side of the tape. Allow to dry 24 hrs. and apply a coat of mud to the other side of the tape. Sand carefully, touch-up if necessary, let dry, and sand. Yes there is a certain amount of "finesse" involved in getting an "off angle" correct, but if you take your time, it will come out fine. More coats of mud may be necessary or a bit more sanding, but it's do-able....

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igneous

Thanks to all replies. Job done and it looks like I was never there. I guess that's the goal. Glad I don't do this for a living.

m1951mm

Since you posted the question in two different sections I am proud to say the painters were the FIRST to respond, lol.

Glad you got it done!!!!!!!!!!!

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Mickey
Fantasy Walls and Windows


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bjbatlanta

Apparently the painters have more spare time on their hands.....LOL

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If you can read this, thank a teacher. If you can read this in English, thank a soldier. Support our troops.

m1951mm

No, we are just not Hanging around!!!!!!

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Mickey
Fantasy Walls and Windows


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igneous

Painting is my "retired " job. I was an English teacher for 35 years. So the tag "If you can read this thank a teacher" lives close to my heart. Drywallers inhale too much stuff.