I am going to plaster walls and ceiling in a bedroom and have started thinking about how I should do it where the plasterboard "meets" in angles. Should you try to cut the sides at an angle where they meet or how do you proceed?
I usually start with the ceiling if I'm going to align the lower or whatever needs to be done. I slightly bevel the sheet so it fits smoothly against the wall, then I take the slanted ceiling and carve with the knife, almost 45 degrees to the ceiling (not much is needed, but it's annoying to redo). After that, I set the wall and do the same thing there. So, essentially, I don't try to create two angles that need to meet, just one angle that covers everything. Depending on how it looks, I fill it with drywall compound if there's a need to fill anywhere. Possibly a strip and regular putty or flexible sealant afterward, there's always a risk of cracking there, so you have to take a chance on what you think is best. At home, I've used a strip, and it seems to look good so far...
I usually do the ceiling first if you are going to align, lower or whatever you are doing.
Bevel the board a bit so it goes smoothly against the wall, then I take the sloped ceiling and carve with the knife only, almost 45 degrees against the ceiling (not much is needed but it's a hassle to redo it.) and after that, I place the wall and do the same there.
So I'm not trying to make two angles that meet but just an angle that covers everything.
Depending on how it looks I fill it out with joint compound if needed in some spots.
Possibly tape and regular compound or sealant after that, you always risk a bit of a crack there so you have to gamble on what you think is best. At home, I've used tape and it seems to look good so far.....
Sounds like a good approach, I'll try and do the same. I've used sealant with good results before between the drywall on the ceiling and wall, so I'll go with that.
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