DIY Install Image

Window Replacement Made Easy


Replacing your windows is the most significant way to increase the comfort and beauty of your home. If you have old, drafty windows that are a drain on your energy bill, are hard to open or need frequent scraping and painting, you can easily replace them with one of our replacement window options.

Considering doing it yourself? Use the following tools and tips to get you started. 

Andersen DIY replacement video

Hear Why Homeowners Choose Andersen Replacement Windows

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Choosing an Installation Method

Insert Replacement Image

When to Choose an Insert Window

  • If the existing window frame is in good condition, not out of square and has not rotted or deteriorated

  • The opening is at least 3 1/4" deep

  • Replacing the existing window with a window of the same size

  • Desire to preserve the interior and exterior window trim

  • Looking for the most cost effective and time saving solution

Full Frame Replacement Image

When to Choose a Full Frame Window

  • Existing window frame is rotted or deteriorated

  • Modifying the size or shape of the existing window

  • Looking to maximize visible glass

Replacing with an Insert Window

Made specifically for easy window replacement, an insert window is sized to fit inside your existing window frame, minimizing the disruption to your home on both the interior and exterior.

The sash are removed while the original frame and trim are left in place, saving you time and money. If you’re replacing windows on the second level, it’s easy to do from inside your home.

• Easier installation
• Minimal disruption
• Use existing frame and trim

Window Installation Tips

Measurement Tips

Measuring guides and worksheet for Andersen 400 Series insert windows.
DIY Window Installation

Andersen Insert Replacement Windows

See how to measure for and install an Andersen 400 Series double-hung insert replacement window.
Install American Craftsman

American Craftsman Vinyl Replacement Windows

See how to measure for and install an American Craftsman vinyl replacement window.

Replacing with a Full Frame Window

A full frame replacement window includes a nailing flange and is installed after the removal of your existing window, including the frame, sash and trim.

If desired, the opening can be enlarged to create more replacement options.

  • More complex installation
  • More disruption
  • New frame and trim required