09/29/2026
When the old window and the new window don’t have the same depth, installation takes a little more work than simply removing one and putting the other in.
This is especially common when replacing older aluminum windows. The original frame may sit differently inside the wall than the new replacement window, which means the interior opening has to be adjusted to make everything fit properly.
That process is called an interior cutback.
During an interior cutback, we may need to carefully trim back some of the interior drywall or existing window trim so the new window can be positioned at the correct depth. The goal is to create a clean, properly sized opening without damaging more of the surrounding wall than necessary.
And because cutting drywall or old trim can create dust and debris, preparation matters just as much as the installation itself.
Before we start cutting, we cover the opening with plastic to help keep dust outside the home. We also protect the exterior work area with drop cloths so debris doesn't end up throughout your lawn, landscaping, rocks, or patio.
A good window installation isn't just about the window itself. It's about understanding how the new window interacts with the existing wall, adjusting the opening correctly, protecting the home during the process, and leaving the jobsite clean when we're finished.
If you have older aluminum windows and are wondering what would be involved in replacing them, Boise Custom Windows & Doors can take a look and walk you through the process.
📞 208-920-1126
🏠 Get in touch for a window replacement estimate.
