If you set the molding as no 3, you can tilt the saw 45° right/left, but then you will definitely get splinters on the front side.
An alternative there is to use a sacrificial board to saw through.
The best alternative if you don't want to angle the saw, as previously written, is to place the molding on a brace and saw through. Top side towards you and front side facing up.
 
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RompisKompis
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I cut it according to image 2. Now I have gotten the edges to meet correctly. So thanks for the info there.
But when I then try to get them to sit against the window frame, it's wrong. You kind of have to angle them outwards for them to still fit together. See image 1. They are not flush against the window.
 
  • A hand holding a piece of mold trim against a window frame, showing misalignment and uneven fit.
  • Close-up of a hand holding a misaligned miter joint of a window frame corner, showing a small gap and the difficulty in aligning it properly.
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Josefin Öberg
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Hammare&Spik Hammare&Spik said:
Hello. I would like to know how to fit corner edge strips 90° together around window edges. I don't know how to miter them with the saw so that they fit together and meet nicely around the window edges (see pictures).

If it were regular flat window casings, I would just miter 45° on both so they meet nicely at the edge...

Grateful for help.
You hold the corner strip with the narrow edges of the strip against the bottom of the miter box.
 
Hammare&Spik Hammare&Spik said:
I cut it according to picture 2. Now I have gotten the edges to meet correctly. So thanks for the info there. But when I then try to make them sit against the window frame, they go wrong. You kind of have to angle them outwards for them to still fit together. See picture 1. They don't lie flush against the window
Yeah, that's not pretty :thinking:
 
Mazen Mazen said:
Yes, that wasn't nice :thinking:
Do you have any idea on how to get it right and nice?
 
K Knuten26 said:
You hold the corner strip with the narrow edges of the strip against the bottom of the miter box
Are all edges of the strip equally wide/narrow?
 
Cut off a few small pieces and experiment.

If you want clean cuts on the painted side, you want the teeth to go INTO the wood on that side. If you lay them with the paint facing downwards, the teeth will exit the piece through the paint, leaving splinters there.

What you need is a square piece of wood to place the molding on so you have the paint facing up and towards you, allowing the saw blade's teeth to enter the paint side. (Alternatively, you need a really fine-toothed, good, and sharpened blade and saw very gently).
 
Hammare&Spik Hammare&Spik said:
Do you have any idea how to get it right and nice?
First, you have a "ridge" on the corner, the easiest way is to sand it down until even. Block + sandpaper which you pull the moulding against at a right angle..
Then, unfortunately, you've got splinters/chips in the cut. So my tip is to use a sacrificial board against the fence that you cut through...
 
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Domagoj Hrenovac
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Then it looks like the saw doesn't cut exactly at 45 degrees. If the edges end up slightly different in length, it's because you're cutting at the wrong angle. For example, 44 degrees in one direction and 46 in the other. On good machines, you can adjust this so it becomes accurate. On poorer machines, you have to experiment and find out which angle is ACTUALLY 45 degrees.
 
P
Hold two pieces in place against a corner, mark the direction in which the moulding will be on the front side of the strips, place them with the mark facing up in the saw, angle to the mark 45 degrees, and you'll probably get it.
 
Take a square and hold it against the saw and adjust the blade accordingly, do not rely on the numbers that are stuck on the saw.
 
Thanks for all the tips! I'll give it another go tomorrow.
 
Hammare&Spik Hammare&Spik said:
I cut it according to picture 2. Now I have got the edges to meet correctly. So thanks for the info there.
But when I then try to make them fit against the window frame, they don't fit. You sort of have to angle them outwards for them to still fit together. See picture 1. They're not flush against the window
Here it looks like you've cut it to fit an outer corner, like a picture frame. The angles should go the other way. For example, look at the lower trim in the lower picture. Then the highest point should be on the right and the lowest on the left.
 
I don't know if I misunderstood your explanations or if I received incorrect information. I had a friend over who is a carpenter apprentice. This person assured me that there must indeed be two cuts made. One straight and one 45-degree. See image

There you see, it finally worked out anyway
 
  • Close-up of a window corner showing a partially detached piece of trim with visible straight and 45-degree cuts, illustrating a construction discussion.
P
No, two 45-degree miters meet perfectly in the corner; it's exactly the same principle as a regular window casing.
 
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tergo and 2 others
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