How to miter corner trim around windows?

[Hammare&Spik]

Nah, two 45-degree miters meet perfectly in the corner, it's exactly the same principle as a regular window molding.

Nah, what you're saying is impossible!

 

[Hammare&Spik]

No, two 45 degree miters meet perfectly in the corner, it is exactly the same principle as a regular window trim.

Two 45 degree miters meet perfectly in a corner with a flat surface, YES. But as you can see from my pictures, there are no flat surfaces.

 

[andersmc]

Don't know if I misunderstood your explanations or if I got the wrong information. Had a friend over who is an apprentice carpenter. This person confirmed that you indeed need to make two cuts. One straight and one at 45 degrees. See picture

There you go, it finally worked anyway

Then your friend is joking with you. Exactly one cut is needed. (Or two, one at each end, of course).

But is your list symmetrical? Or is there a long and a shorter flap? In the upper picture, it looks like the list is asymmetrical and you have turned the pieces in different directions. You must also have the cut completely clean. You can't have protruding burrs, as it will never fit.

How are the angles around the window? It looks like the drywall is very unevenly cut. You need to prepare the surface so that the moldings truly meet at 90⁰.

 

[Stefan N]

Again, you don't know how to make a very simple saw cut but it can be done the way you've done it, but it's just as good to do it right too.

 

[Hammare&Spik]

Again, you don't know how to make a very simple saw cut, but it works doing it the way you did, yet it's equally possible to do it correctly too.

In my case, this way. Two cuts the only possible way.

 

[Mazen]

A cut at 45°, clear!

 

[Hammare&Spik]

A cut at 45°, done!

A cut at 45°, done!

Then your friend is joking with you. Exactly one cut is needed. (Or two, one at each end, of course)

A cut at 45°, done!

Look at the pictures and get back to me when you see how the conditions look for me exactly!

But is your molding symmetrical? Or is there a longer and a shorter flap? In the upper picture, it looks like the molding is asymmetrical, and you've turned the pieces in different directions. You must also have the cut completely clean. You can't have protruding burrs, then it will never fit.

How are the angles around the window? It looks like the drywall is very unevenly cut. You have to prepare the substrate so that the moldings really meet in

 

[Hammare&Spik]

Check the conditions for just me and get back to me once you have looked closely at the pictures.

 

[richardtenggren]

Show a picture of how you are going about sawing, and we can explain what you are doing wrong.

The fact that the apprentice carpenter doesn't understand better just illustrates how low the quality of education is today.

 

[McNulty]

But in the pictures you posted earlier, you had cut so that the trim became external. It's not surprising if you think it's wrong then.
One cut is enough.

 

[Stefan N]

Does anyone have a hörnlist lying around they can show? I'm completely out.

 

[Mazen]

Mess..

 

[davveno1]

Certify that it works perfectly with a slice. Done many times.

 

[Hammare&Spik]

I have to swallow my pride. I was wrong and you were right. Figured it out now.

 

[Mazen]

Have to admit defeat. I was wrong and you were right. Figured it out now

You are not alone, I asked the kid who is doing Construction and he scratched his head for a long time before he could say how to do it... and he's not new to figuring things out.

However, glad to be of assistance.