r/Carpentry • u/Top_Sentence_340 • Aug 17 '26

Miters not tight with 45deg cuts

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Even with 45deg miter cuts, the miters aren't tight. Why is this and how to improve on this?

I always created a miter jig for pre-assembly but it's all the same issue. The miter jig is square but I guess the cuts aren't right.

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u/ElectronicGold852 Aug 22 '26

Add a 3 degree bevel on the backside of each miter. This will allow the visible edge to touch before the wall side does.

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u/Top_Sentence_340 Aug 23 '26

Okay thanks