How to Frame a Corner Mirror
- 1). Measure the top and bottom edges and the height of the mirror.
- 2). Measure the width of the decorative trim and add that amount to the mirror's measurements.
- 3). Measure and cut the top and bottom trim boards, allowing 2 inches extra for each board.
- 4). Using a carpenter's triangle, check the angle of the mirror's corners. If they are a perfect 90 degree angle, use a miter box. Stand the trim on one end and cut the trim boards at a 45-degree angle with a saw.
- 5). Lay the decorative trim for one side of the mirror on a flat surface. Measure carefully, then mark the corners at a 45 degree angle. Cut with a saw. Set aside and repeat with the other side of the mirror.
- 6). Sand the decorative trim lightly with a 150 to 180-grit sandpaper. Wipe with a tack cloth to remove all dust.
- 7). Paint the back side of all the trim pieces. Allow to dry according to the manufacturer's directions, then apply a second coat of paint. Allow to dry completely.
- 8). Turn all the trim pieces over and paint the decorative side. Allow to dry, then apply a second coat of paint.
- 9). Draw a bead of construction glue along the wall, just above the mirror. Carefully fit the top two pieces of the trim onto the top of the mirror, butting tightly together in the corner. Press firmly in place. Use painter's tape to hold the trim in place while the glue dries.
- 10
Repeat the process with the bottom trim, taping it to keep it securely in place while the construction glue dries. - 11
Insert the side pieces, checking for fit. Apply construction glue to the wall and press the trim into place, butting the pieces firmly against the top and bottom trim. - 12
Caulk around all edges of the mirror's new frame, including the corners where the trim butts together. Wipe excess caulk off with a damp finger or rag. Allow to dry, then touch up with paint.
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