What Is Coping and Why Should You Do It?

Want your DIY baseboard job to look professional? You need to start coping baseboard joints. Learn more about what this means and why you should do it here.

Coping Baseboard Joints: What Is It and Why Should You Do It?

Chances are you don't really notice your baseboards. That is—until there's an unsightly gap at the corners. Then you won't be able to stop noticing them! 

A baseboard corner with a big gap looks unprofessional and untidy.

The solution is coping baseboards so this doesn't happen. Read on to learn how to cope a baseboard corner and why you'd want to.

What Exactly Is Baseboard Coping?

Coping a baseboard is a carpenter's technique that is used to join two pieces of wooden molding at inside corners for either baseboard or crown molding. Plus, this technique works great for chair rails and picture rail molding. 

Coping baseboard requires two steps, a miter saw, and a coping saw. It does take some practice to get good at coping baseboard trim. But after a while, you'll be an expert.

You might be wondering why coping baseboard is even necessary. Well, for one thing, most homes have interior walls that aren't square. Sad, but true.

That means that getting two tight-fitting pieces to form a corner is that much harder. A 45-degree angle cut with a miter saw doesn't work when walls are out of square, even if they are just a hair off. 

Also, depending on the humidity in your home, your wood will shrink and expand. The walls might also shift and settle (especially if the home is a new build or getting older). 

All of these scenarios negatively affect the trim if it is not coped. And you can't cover up baseboard problems with a lovely area rug. 

Coping baseboard trim helps prevent your corners from growing a gap, no matter what. 

How a Coped Joint Works

Baseboard coping cuts the wood in such a way that the cut follows the contours of the molding's face. 

One piece of molding is cut square, butts right into the corner, and is fastened in place. The second piece of wood is coped to carefully nest against the first piece of wood. 

This method solves the problem of out-of-square corners because the second piece is cut to fit the first piece, regardless of the wall's angle.

How to Cope a Baseboard Corner

We found an informative YouTube video showing the process:

First, cut the first piece of molding with a 90-degree cut that runs right into the corner. Fasten the molding with finish nails and a hammer.

Next, cut an inside miter on the second piece of molding but leave the piece of woof a few inches longer than the final length.

Using a pencil, outline the shapes and curves of the molding profile. Now, clamp your wood securely and use your coping saw to cut along the pencil lines you drew. Try to keep the blade about 1/16-inch to the waste side of the cutline. 

A coping saw has a thin, flexible blade that is designed for cutting intricate patterns. That's why this tool is vital.

When you are done cutting, the second pieces of wood will easily nest against the first piece of molding. You may need to sand or file away high spots for a perfect fit. 

Then, cut the molding to length and attach it to the wall. Caulk the seam and you are done!

Get Started Coping Baseboards in Your Home

There you have it! A detailed post about how coping baseboard works and how you can DIY them in your home.

Are you doing various renovations in your home? Get inspired for your next flooring project by visiting our inspiration gallery.

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