How to measure for andersen replacement windows

  • 1-800-426-4261

How to measure for andersen replacement windows

  • About
  • Products at The Home Depot
  • Inspiration
  • Brochures & Resources

Brochures & Product Guides

  • Products at The Home Depot

  • Inspiration

  • About

  • Brochures & Resources

Brochures & Product Guides


Use the filters on the left to refine your results.

What is the best way to measure for replacement windows?

Measure from the high point of the sill of your window (the surface closest to the inside of the window) to the top of the window opening. Make three measurements: one at the left side, one at the center and one at the right side of the window. Use the smallest of these three height measurements to order the window.

Do you measure replacement windows from the inside or outside?

To fully replace existing windows, you'll need both inside and outside measurements. From the inside, remove the casing and measure the width and height from the outside (edge) of the window frame, 6” from the corners and at the centre. This is your outside measurement of window frame (OSM frame).

Do replacement windows need to be exact size?

When it comes to replacing your windows with an insert replacement window, you need to ensure there is no rot in the window frame. Also, the window frame must be square and level, and you must want your replacement window to be the same size, shape and operating style as the old window.

Do I need to remove trim to measure for replacement windows?

First way, is to remove the trim of the window from the inside and then measure the frame from the edge to edge, from left to right. You won't have to remove both casings, if you remove only one trim you can estimate where the other edge of the frame maybe under the casing.