This is probably so simple that I can't see the forest for the trees, but I have a bay window that doesn't have right-angled walls, but another unknown degree. Now when I'm going to mount baseboards, it's not a 45-degree cut, but something else. Both the outer corners and the inner corners are giving me gray hairs.

I seem to remember there is a carpenter's trick to calculate the "middle cut" between two walls, and thereby set the saw accordingly? Somewhere in some program, I saw that they had a piece of paper on the floor and drew a bit here and there and got the middle cut? Or should I go out in the snowstorm and buy some kind of angle measure?
 
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I will try to explain this in text only. My partner and I live in an apartment built from brick and plaster in the mid-40s, so there isn't a straight corner here at home.

What you can easily do to get the right angle in the corners is take any implement you know has a 90-degree corner, e.g., a leftover piece of skirting. Place the skirting piece against the wall into the corner. Draw a line on the floor at an angle to the wall where you have the skirting piece. Do the same on the other side of the corner. Now you have two lines on the floor. In between these lines, draw a third line. This line is the angle you want to cut along. I’m attaching a picture to perhaps give some clarity to my vague explanation.

The blue line in the picture is the angle you should cut after.
 
  • Diagram showing a corner with three lines indicating angles, the blue line is the correct angle to cut.
The Hultafors angle bisector is perfect for this, and if you really want to use other methods, you need to have a bevel gauge and a square.

-Kent
 
Ah, thanks for the explanation Emil! That's exactly what I was looking for.
I'll try it out and see how the result turns out, otherwise, I'll take Kent's advice, i.e., buy more pryttlar :)
 
Hello Shadowfire. I recommend that you buy a smygvinkel. It costs around 50kr and what you do with it is you copy the angle and can then take the angle with you to the saw. Very useful. Hope everything works out with the angles // Putte
 
I'll need to buy such an angle finder, so I'll get that next time I visit a hardware store.

Emil's description worked perfectly, really simple. Tried it on an outer corner with two sparse panel pieces, drew two lines, backed out 6cm on each, and marked the centerline between the two points 6cm out. Placed the paper in the miter saw, adjusted the saw, and then went ahead... I don't press the blocks together now, but when I did, it was gap-free ;) ... so with some paper + ruler, this works for tonight's build at least :)
P1120820.jpg
 
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