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Step 1
Note where the inline joint cuts need to be made on your base molding. They must be made in the center of a stud. This helps to keep the base molding tight against each other and helps with separation in some cases.
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Step 2
Learn that when wood dries, joints normally separate. Using inline cuts helps to correct this problem, but you will have some separation even with inline cuts. Inline cuts make repairs easier because you have less gaps to fix in your base molding.
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Step 3
Make base inline joint cuts with a miter saw by turning your miter saw to a 45-degree angle. For example, if you're cutting the right-hand side of your inline cut first, your base will be on the right-hand side of your saw, cutting the left end of your base. This gives you a 45-degree cut on your base.
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Step 4
Cut the left piece of base with your miter saw to match the piece you just cut, thus getting the two to mate. Here's how to measure in order to find the spot where you need to cut: From the left-hand wall (which will normally be a square cut), measure to the long point on your other piece of base.
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Step 5
Finish making your base inline joint cut by leaving the miter saw on the same 45-degree angle. Now, take the base and put it on the left-hand side of the miter saw. Cut your base. This gives you a reverse 45-degree cut which will mate with your other piece of base, giving you a clean and attractive inline cut.
