Your 3-Step Guide To Measuring Your Windows for Replacement

Step 1. Measure the Width

Start by measuring the width of your window opening. It’s important to measure at three points to ensure accuracy:

• Top
• Middle
• Bottom

Measure from the inside of one jamb (the vertical parts forming the sides of the window frame) to the other. Be sure to write down the smallest measurement of the three to ensure a proper fit.

Step 2. Measure the Height

Similar to step one, measure the vertical height of the window at the same three points — top, middle, and bottom. Make sure to measure from the tallest point and, again, record the smallest result of these three measurements. A word on measurement discrepancies: One-quarter to one-half inch longer than the actual measurement is the rule of thumb. Never be short.

Step 3: Measure the Depth

To determine the depth of the window, measure between the outside and inside stops that extend in front of the window frame. You should measure this dimension a few times and note the shortest point. This measurement must be at least 3-1/4″.

Additional Advice on Measuring Windows:

• Always measure width first, followed by height, to avoid confusion when placing your order.
• Record the smallest measurement from your width and height calculations to ensure a precise fit.
• If your window opening isn’t perfectly square (if the measurements differ diagonally), this can affect the installation. In such cases, consult with a professional for advice.

Final Thoughts on Window Measurements

We have provided you with these three simple steps and tips on measuring for new or replacement windows. If you’re still unsure of the accuracy of your measurements, ask your Zen Windows team for help.

Want to talk to your local Zen Windows team before you start measuring? Find your closest location or call.