The Ups and Downs of a Door Shim


a door shim has a top?

The Ups and Downs of a Door Shim


The pitch of the door shim is important!

Did you know that a door shim has a top and a bottom, and that if you put it in the wrong way it doesn’t work? Let’s take a look at this.

Blog-Shimupdown-Picture-1

To start, we’ll call the thicker portion of the door shim the top and the thinner end the bottom. The taper this creates is designed not only to help make up various gaps when combined with another shim, but it also sets the “projection” of the door. Take a look at the picture below.

Blog-Shimupdown-Picture-2

All bound up?

Have you ever tried to shut a door that feels like it is binding when you try to close it the last few inches? More than likely, this was caused by putting the door shims in the wrong direction creating the bad projection and the door hinges to bind.

Blog-Shimupdown-Picture-3

By correctly placing a door shim at each hinge, you will help the door to easily close all the way. It’s all about the top and bottom when it comes to a door shim.

Blog-Shimupdown-Picture-4


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One thing has stood out clearly to us in our combined 15 years of experience in both the sales and installation of residential/commercial doors…. the lack of accurate door installation happening in the field. This installation process has been virtually the same since pre-hanging started in the 1960’s and yet it’s not uncommon to find a poorly installed door on most jobsites. It’s time to take a new look at this.

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