How to Measure and Cut Door Casing How to Measure and Cut Door Casing

What You'll Need
Measuring tape
Pencil
Paper

Installing door casing isn't difficult as long as you know how to measure accurately and apply those measurements as you prepare to cut.

You will need to be able to measure the length as well as the width of your door casing.

Step 1 – Measure Width

When measuring width for te door casing, start at the inside of the right corner and go to the inside of the left corner. Make sure that you cut both of the ends from the measurements on an outward 45-degree angle. Your right side cut is going to be 45 degrees from the right to the mark. The left side cut will be 45 degrees from the left to the mark.

Step 2 – Measuring Length

Whenever you are measuring length you start at the floor and measure inside to the top corners. The bottom of the casings will be a straight bottom cut while the tops will again be at a 45-degree angle.

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