How to Add Trim to a Drywall-Framed Doorway
Doors are hung in casings, which is the border of wood onto which the door is hinged. The walls are drywalled, with the drywall coming right up to the casing. The space between the casing in the wall has to be covered for the door to look finished. Standard door trim is flat and smooth, covering a gap and giving the door a visual frame. Does this Spark an idea?
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Instructions
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1
Measure the width of the door opening across the top, from top corner to top corner, along the edge of the casing next to the drywall.
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2
Make a pencil mark on the bottom edge of a piece of door trim. Measure from the mark out by the measurement you took in the doorway. Put a second mark there.
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3
Set the trim on a miter saw with the bottom edge toward the back rail and the front side facing up. Position it so one of the two marks is under the blade. Turn the blade 45 degrees outward, pointing away from the center of the trim. Make the cut.
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4
Slide the trim so the second mark is under the blade. Swivel the blade 45 degrees outward so it again faces away from the middle. Make the cut.
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5
Hold the trim piece over the door opening, so the bottom edge is lined up with the top of the opening. Position it so the two mitered ends rise up and off the two upper corners. Nail in the piece with a trim nailer, shooting the nails along the upper and lower edges every 10 to 12 inches.
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6
Measure one of the vertical sides of the doorway and mark a piece of trim as before. Miter-cut the upward-facing end as before. Straight-cut the downward-facing end so it can sit flat on the floor.
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Install the side piece with the mitered top end butted to the end of the miter on the top piece and the straight-cut bottom end on the floor. Secure it in the same way as before, with the trim nailer.
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8
Repeat the process for the other vertical side of the doorway.
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