Project Guide

Cutting Outside Miters in Crown Moulding

1
MITER THE FIRST PIECE OF MOULDING
Miter first piece moulding - Cutting Outside Miters  Crown Moulding

Start with two pieces of moulding, each a few inches longer than the section of wall they will cover. Set the saw blade 45 degrees to the right. Put the moulding that goes on the left-hand side of the corner against the fence to the left of the blade. Cut the moulding, leaving it long.

2
MITER THE SECOND PIECE
Miter second piece - Cutting Outside Miters  Crown Moulding

Turn the saw blade 45 degrees left. Put the second moulding to the right of the blade, and cut a miter in it that leaves the board longer than finished length.

3
LAY OUT THE LENGTH
Lay out length - Cutting Outside Miters  Crown Moulding

The point of an outside miter sticks out beyond the corner by the thickness of a moulding. To get the right length moulding, measure the wall, add the thickness of the moulding, and make a mark that distance from the mitered point of the moulding. It's sometimes easier if you do it in steps, as was done in the photo. The moulding shown here runs along a short wall of an alcove, which measures 10 3/8 inches. The moulding is 1/2 inch thick. If you look closely, there's a light mark on the moulding at 10 3/8 inches; the second mark, which shows where to make the cut, was made by adding to that the thickness of the moulding.

4
CUT THE MOULDING TO LENGTH
Cut moulding length - Cutting Outside Miters  Crown Moulding

Set the blade for a square cut (0 degrees), and lay the moulding on its back on the saw table. Cut the moulding at the line.

5
INSTALL THE MITERED PIECE
Install mitered piece - Cutting Outside Miters  Crown Moulding

Test fit the pieces against the wall to check alignment. Nail one of the mouldings on the wall, dab wood glue into the mitered surface on the second piece, and nail it in place, too. Reinforce the joint by driving 1-inch brads through the faces of both mouldings, through the miter joint, and into the other moulding.