We have built some interior walls that form a 135-degree angle. Unfortunately, the result of the plastering wasn't perfect, so we can't get the wallpaper to sit as smoothly as we want around the corners. To fix this, we thought a discreet little trim could cover it all...

The question now is what type of trim?

Our first choice would be a trim designed specifically for 135 degrees, but I haven't found any. Has anyone seen such a trim?

Alternatively, I could consider letting two quarter rounds (8x21) meet with the sharp angles facing each other. My eye tells me it might be too blunt to work without planing, but I could be wrong. Does anyone know what the angle is on a standard quarter round?
 
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1 - An acquaintance of mine glued an alu-profile on their 135-degree corners.
2 - The angle on the smyglister is too small.
 
Thanks for the response!

Do you happen to know where your acquaintance got hold of the aluminum profile? If you can get one that is painted white, then maybe it can work... However, we have tried to maintain a slightly older style in the room, so it might not match the feeling we want 100%... but it's worth following up on, in any case!
 
Ola78
If you take and split 2 strips at 22.5 degrees they should fit against each other.
 
No, I don't know where he got them. Also, they weren't white. Another tip is to go to a sheet metal workshop and bend a white sheet. If you cut it so that it is 60 mm wide and first bend it 45 degrees in the middle and then 15 degrees the outermost 5 mm (both sides), you get an ankant. Glue with PL400/600.
 
Ola78 said:
If you cut 2 strips at 22.5 degrees they should fit together.
Of course, I get that trigonometry. If only I had the equipment for it... if we were talking studs, I could easily do it with the circular saw. But this isn't quite those dimensions.

Re: metal: Thanks for the tip. But I think I'm primarily considering a wood strip anyway. But if that doesn't work, metal could be an option.
 
Ola78
If you know of any company that does some fine carpentry, they might be able to help you; they usually have the equipment to make moldings and similar things in a nice way. It shouldn't take too long for them to help you with your moldings, maybe give them a little coffee money as thanks for the trouble and they are usually happy.
 
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