How to Install a Chair Rail--Cutting and Installing the Bed Molding
Cutting and installing the bed molding is the most challenging part of the project, since it perches at an angle to the rails. As you work, keep picturing how it will sit against the rails after it’s installed. There are three details you need to contend with:
Outside corners. Outside corners meet with simple 45-degree miters. Position an overly long piece of bed molding in place, then make a little “tick” mark on the back lower edge where the 1x4s meet at the corner. This is the short side of your miter. Position the molding in your miter saw upside down (Photo 6) and use clamps or cam pins to hold the molding square to the fence. Set the saw at 45 degrees, line up the tick mark with the blade and carefully make the cut. It’s easy to screw up here—remember that your tick mark will be theshortestpart of the miter. After one piece is cut and tacked in place, use a test piece to make certain the second piece will meet it at the correct angle.
Inside corners. Since inside corners are rarely square, mitered moldings usually leave a gap. It’s best to run one piece square into the corner (that’s the easy one!) and then “cope” a second piece to butt into it. The best way is to cut a 45-degree angle on a molding, then use that profile as a guide for cutting out the shape.
Returns. You need to “cap” the ends where the chair rail overlaps window and door casings. Cut the long piece of molding at a 45-degree angle so the long point is 1/8 in. shy of the outside corner (Photo 8) of the top rail. Then miter a small piece to turn the corner and “return” the molding to the horizontal rail. It’s like an outside corner, but the second piece is really small. Glue and tape the piece in place. You’ll bust it if you try to nail it.
TipIf you have moldings with a cope or angle on one end and a square cut on the other, always cut the cope or angle first. After you test-fit and fine-tune the piece, you can make the final (simpler) square cut to create the right length.
The smaller glass bead molding, which covers any gaps between the wall and bottom of the 1x4 rail, is a breeze compared with the bed molding. Cut and test-fit the outside corners the same as you’ve done with other outside corners. Since the molding is so small, you can miter (rather than cope) the inside corners.
Puttying, Priming and PaintingFill the nail holes and gaps with sandable wood putty, then smooth all surfaces with fine-grits and paper. Lightly run the sand-paper along the edges of the boards to ease them.
If you have gaps larger than 1/8 in. where the 1x2 rail meets the wall, run a small bead of paintable caulk in the gap. Prime, then paint the wood. You’re done.
More Simple Chair Rail Ideas
A chair rail like the one we show is thicker than most contemporary moldings it butts to. Here are a couple of ideas for dealing with common situations:
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If your existing door and window moldings are thin, you can cut out a small section of casing at chair rail height, install a thicker rosette, then butt the chair rail into that. Rosette blocks are made by House of Fara (a brand carried by many home centers). Visit the company’s Web site at www.houseoffara.com or call (800) 334-1732 to find a dealer.
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Use single, flat chair rail moldings that don’t protrude past the casings. There are many embossed or fluted moldings that will work.
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You can run a thicker band of wood, say a 1/2-in. x 1-1/2 in. strip, entirely around existing casings to provide a thicker edge to butt the chair rail to.
You can use different moldings and boards in any of hundreds of combinations to create your own chair rail. Always try to match the look, feel and scale of the other moldings in the room.




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