Patching and Plastering - Spackling joints in non-90 degree corners

I have three walls in my house that have irregular corners. The corners are much larger than 90 degrees (about 120 degrees). I used the Sure corner tape that has the metal strip on the tape. How do I spackle this kind of an angle? If I do one side of the corner, then the other side comes out wrong.

Thanks for your help.

Mich :confused:

Hi Mich and welcome to the forums.

Are you using spackle or joint compound for this job, spackle should only be use for small repairs. I would recommend using lite joint compound and finishing the corner one side at a time for a DIYER, mudding corners takes practice and you have to be patient, thin coats and proper drying time between coats is essential for good results. Good luck.

inside corner? outside corner?

I have two inside corners (I believe the angle is 135 degrees). I am using a joint compound. I have done 90 degree inside and outside corners without a problem. I just can't seem to get the larger inside corner right and was curious if there are any tips.

Thanks.

Like awsomedell said do 1 side at a time. Before you do the first side put some tape on the side of the corner you are not going to mud. Make it nice and straight in the middlle top to bottom. Snap a line if you have to. When done with the first side and it is dry score the edge of the tape near the corner and remove it sand and remove dust then apply tape to that side. snap another line if you have to and do the remaining side. if the middle doesn't look perfect put some compound in it with your finger and remove all but what is necessary to fill the imperfections[ caulk is good too]. When sanding use a sponge sander with a bevelled edge and use the bevelled edge in the corner. You may not have to go through the second half of this process if the first side produces a nice straight line for the blade to ride on That is all I can come up with. Hope it helps.

I'm picturing this as the bottom end of a vaulted ceiling to wall joint, if that's the case I'd use some paper faced flex bead on it. Pre mud the joint if any gaps exist and then run the flex bead over it. When you go to embed the tape start in the middle, using like a 4" drywall blade, and pull each side in opposite directions towards the ends. If you can't run the full length from your starting point to the end of the tape be sure to overlap where you ended when restarting your pull. Hope that's clear enough, it's a bit hard to explain. Post back if you need clarification.