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How to Get Accurate Window Measurements



To find out what size window you should order from our site, you must make an accurate measurement. Your new window will go over the existing frame, so you will be measuring the distance between the inner most parts of the frame. For detailed instructions follow these steps, or watch the tutorial video below.

Old Window
Window Frame
measure left

To get the width, Open the window and measure the distance from inner most part of the vertical frame. Measure to the 1/8th inch mark.

Subtract 3/8th of an inch from your measurement. This will give you room to install the window with the caulking.

right side measure measure width
measure top

To get the height, measure the distance from the inner most part of the horizontal frame. Measure to the 1/8th inch mark.

Subtract 3/8th of an inch from your measurement.

measure bottom measure height