How to Reinforce Miter Joints

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Reinforcing miter joints keeps corners tight and sturdy. Strengthen your miters with nails, screws or splines using instructions from an experienced remodeler in this free video on reinforcing miter joints.

Part of the Video Series: Home Maintenance Tips
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Video Transcript

Hi, my name is Chris Palmer. Today, I'm going to talk about how to reinforce miter joints. The easiest way to reinforce a miter joint is with nails or screws. That's probably something you've done already. Another way to do it is to cut a spline and insert a spline across the grain in that miter joint. That winds up looking something like this. You can see the different color wood is where I cut in a spline and then sawed it flushed, sanded it. And it's an attractive and strong joint. Here's a jig you can use on your table saw to cut the hole for your spline. Your box or your picture frame rides right in the jig and you slide it over your table saw blade. This is a 45 degree angle and just backed up with these two sides. This rides against the fence. Another way you can cut these splines is with a biscuit joiner or you could cut it with a hand saw. Either way, back up those miters and you'll have a strong, attractive project. My name is Chris Palmer, that's how you reinforce miter joints.


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