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Step 1
Notice when installing standard base molding, the thickness of the base molding is normally constructed so that it will not extend past your door trim. Thus, it is not usually necessary to cut a 15-degree angle on base molding.
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Step 2
Take your miter saw to the spot where your baseboard is contoured at the top. Turn your miter saw setting to a 15-degree angle. You must take about 1/8 inch off of your square cut at the front of your baseboard. This gives you a bead effect running down the side of the casing on your door molding. This type cut is for cosmetic purposes only.
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Step 3
Think about this example of when you may need to cut a 15-degree angle for base molding installation. When using a piece of ¾-inch thick wood for base, it will normally stick out past your casing. Measure the depth of your casing and transfer the mark on the top of your ¾-inch base. Now, cut a 15-degree angle straight down from that mark. This gives you the look that your base is fitting flush with your casing.
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Step 4
Cut a 15-degree angle for base molding installation when you want to give your base molding a little more character than just straight standard cuts. For example, if your door is on the right-hand side, turn your miter saw to the left on the 15-degree angle setting. Have your baseboard standing up on your miter saw, flush against the backstop of your miter saw. Take off the desired amount from the front of the base molding.
