What Is a New-Construction Window?
New-construction windows include a nailing fin around the frame and are installed after the old frame is removed down to the rough opening. This approach is typically used when the surrounding wall, stucco, or siding is already being opened up as part of the project.
Remodels & Additions
When walls are already open during a remodel or room addition, new-construction windows allow for a clean, properly flashed installation.
New Home Builds
New-construction windows are the standard approach for ground-up construction, where the rough opening is built to the window's exact specifications.
Changing Window Size or Shape
If you're enlarging an opening or changing a window's shape, new-construction installation is generally required rather than a retrofit approach.
Damaged Frames
When an existing frame has damage or rot, a full new-construction replacement can address the problem at its source rather than building around it.
Simply Updating Existing Windows?
If your existing frames are in good condition and you're not changing size or shape, retrofit windows may be a faster, less invasive option.
Frequently Asked Questions
What is the difference between retrofit and new-construction windows?
Retrofit windows install into your existing frame with minimal disruption to surrounding stucco or siding. New-construction windows have a nailing fin and are used when the frame is removed down to the rough opening, typically during larger remodels or new builds.
Do I need new-construction windows for a room addition?
Generally yes — since the wall is already open during an addition, new-construction windows allow for proper flashing and integration with the new framing.
Can new-construction windows be used to enlarge an opening?
Yes, changing a window's size or shape typically requires new-construction installation rather than a retrofit approach, since the rough opening itself needs to change.