Many homeowners believe that new construction windows—often called “new windows”—are only used for brand-new homes or major remodels. In reality, this is a common misconception.
New construction windows can also be installed during a window replacement project, as long as the exterior of the home is properly exposed. This type of installation requires access to the home’s substrate or sheathing, allowing the window to be securely attached directly to the framing using a nail flange.
This installation method is considered one of the best ways to install windows because it creates a complete, weather-tight seal around the entire window opening. By integrating the window directly with the structure of the home, it significantly reduces the risk of air and water intrusion.
While installing new construction windows may involve a higher upfront cost compared to retrofit options, it provides superior long-term performance, durability, and energy efficiency. For homeowners looking for the most effective window replacement solution, this method delivers the best overall results.
A nailing flange on a new construction window is the metal or vinyl fin that extends outward from the perimeter of the window frame. This flange allows the window to be securely fastened directly to the home’s framing while creating a tight, weather-resistant seal around the entire opening.
This is a critical component of proper window installation, as it helps integrate the window with the home’s weather barrier system, preventing air and water from entering.
In contrast, replacement windows typically do not include a nailing flange—or the flange is removed prior to installation to make the process quicker and less expensive. While this may reduce upfront costs, it also eliminates one of the most important sealing components of the window system.
Choosing to install windows without a nailing flange can lead to serious long-term issues, including:
At Metro Reconstruction Services, INC, we rarely recommend standard replacement window installations because we understand how important it is to seal windows correctly the first time. While installing new construction windows with a nailing flange may cost more initially, it provides superior protection, durability, and long-term performance for your home.
See a Proper Window Installation Example
The Waterway Rainscreen installation process provides a strong example of how windows should be properly installed—especially before the stucco phase begins. While systems may vary, the key takeaway is the importance of correct flashing, sealing, and integration with the wall system.
Please click here to watch the video. the important part is the begining up to about 3:29.
Benefits of Properly Installed, High-Quality Windows
When windows are installed correctly using a nailing flange and proper flashing methods, homeowners benefit from:
