Reply by salewis3

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Posted on Framing a Mirror: How do you affix the mirror?

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3 posts in 2463 days

#1 posted 01-22-2013 04:23 PM


Typically, the backing board and the glass are the same size, and the frame is cut 1/8” larger leaving an allowance for the materials to expand and contract. The rabbet is typically 1/4” wide, and deep enough to accommodate the materials it contains.

Your idea of a stepped rabbet is sound, but more work than you really need to do. The steps should match the thickness of the materials so there isn’t any slop (in the thickness. There should still be an allowance.)

However, simple brads every 5-7 inches along the rail lengths will hold well and not cost much. But you should do what makes you happy.


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