- 1). Measure the distance between the walls as well as the depth of the walls for the proposed window seat. Subtract 11/2 inches from each measurement to give you the dimensions of the bottom. For example, if the measurement is 60 by 24 inches, the bottom piece must be 58 1/2 by 22 1/2 inches.
- 2). Determine the height of the window seat by measuring from the floor to just under the window trim. The depth of the sides is equal with the bottom piece. The average height for a window seat is 18 inches (yours may be more or less); using our example from Step 1 the sides of the window seat become 18 by 22 1/2 inches.
- 3). Make the length of the front and back of the widow seat the distance between the walls and the height of the sides. In our example, they measure 60 by 18 inches.
- 4). Apply some wood glue to the end edges of the bottom. Stand the bottom on one of its long edges and the sides on their 18-inch edges. Secure the sides to the bottom with 1 1/4-inch drywall screws. Clean up excess glue with a damp cloth.
- 5). Run a bead of glue on the 3/4-inch edges of the sides and the bottom pieces. Put the back piece on them and secure it with 11/4-inch drywall screws. Turn the window seat over and clean up the excess glue as before.
- 6). Next, put some glue on the 3/4-inch edges as before. Set the front on them and secure it with 4-penny finish nails. Turn the window seat upright and clean up the glue.
- 7). Make the top of the window seat 1/4 shorter than the measurement between the walls, but keep the depth the same. (Ours is 58 3/4 by 24.) This is so it won't rub the walls when it is in use. Attach a piano hinge to the top according to the manufacturer's instructions. Center the top on the window seat and secure it through the piano hinge with the provided nails or screws.
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