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Step-by-Step Pictures and Instructions For Tight Miters on Recessed Jambs

Tricks for getting tight-fitting joints on door and window casing and base moldings. Read an overview of DIY Trim Tricks.

By Jeff Gorton
From The Family Handyman
tight-fitting joints on door and window casing and base trim.
Image 1 of 4

1. Cut a shim just thick enough to slip under a straightedge spanning the drywall corner. Use this shim to elevate the outside edge of your molding (Photo 3) before cutting it.

tight-fitting joints on door and window casing and base trim.
Image 2 of 4

2. Trim back the drywall with a sharp utility knife until the molding no longer rocks when it’s set in place against the jamb and drywall. Use a hammer to mash and flatten the drywall if necessary.

tight-fitting joints on door and window casing and base trim.
Image 3 of 4

2. (cont.)

tight-fitting joints on door and window casing and base trim.
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3. Space the outside edge of the molding up with the shim (inset photo) and cut the 45-degree miter. Repeat the process for the opposite miter. Follow the tip in Photo 1 if other small adjustments to the angle are needed.

Copyright ©2005 Home Service Publications, Inc.
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