How do I miter the trim for this opening?

I want to trim this opening in flat stock. The 2 side pieces, which obviously need to be cut down, are plumb and temporarily set at the correct reveal. Unfortunately, the top of the opening is not level. The left hand side is 1/4" lower than the right. How do I determine the angle of the miters so that I maintain the same reveal across the top and don't have any gap at the miters? I suspect that if I do it mathematically, the difference will be so small (like 0.15°?) that I won't be able to set my miter saw accurately. https://preview.redd.it/yuy6i9k27d5f1.jpg?width=1296&format=pjpg&auto=webp&s=0c3f20d820b7511b528b398cdcdd80f61c76c6af submitted by /u/DerbyDad03 [link] [comments]

Jun 6, 2025 - 21:16
 0
How do I miter the trim for this opening?
How do I miter the trim for this opening?

I want to trim this opening in flat stock. The 2 side pieces, which obviously need to be cut down, are plumb and temporarily set at the correct reveal. Unfortunately, the top of the opening is not level. The left hand side is 1/4" lower than the right.

How do I determine the angle of the miters so that I maintain the same reveal across the top and don't have any gap at the miters? I suspect that if I do it mathematically, the difference will be so small (like 0.15°?) that I won't be able to set my miter saw accurately.

https://preview.redd.it/yuy6i9k27d5f1.jpg?width=1296&format=pjpg&auto=webp&s=0c3f20d820b7511b528b398cdcdd80f61c76c6af

submitted by /u/DerbyDad03
[link] [comments]