There's a lot to consider when shopping for new windows. And while many customers at least have a general idea about different frame materials, glass types, and styles, they are less familiar with the differences between new construction and replacement windows.

That's the purpose of this blog: to explain the key differences between these two window types and help you determine which option makes the most sense.

New Construction Windows

As the name implies, new construction windows are designed specifically for installation in new structures or in situations where wall framing is exposed.

Defining Feature

New construction windows are built with a nailing fin extending from the frame. This flange allows the window to be securely fastened to the frame of the house before exterior brick or siding is installed.

The New Construction Benefit

The obvious benefit of new construction windows is that they are secured to the structural framing of the home, which means that they are more secure and have a superior weather-tight seal than retrofitted replacement windows.

When to Use New Construction Windows

While new construction windows are primarily used when building a new home, there are situations in which they may be used in existing structures.

• In cases where your existing window frames are seriously damaged by mold or dry rot, new construction windows allow you to replace both the window and the frame.
• New construction windows are also an ideal choice for homeowners who need customization or want to change the size or location of windows during major renovations.

Installation Process

New construction window installation involves securing the nailing fin to the structural frame of your home. The process requires access to the studs, which means:

• Your new windows are installed before exterior materials like brick or siding
• If your windows are being installed after your home is built, some of the exterior materials (siding, brick, stucco) will likely have to be removed
• After installation, weather flashing is installed around the window
• Finally, exterior finishing materials are installed or replaced

Replacement Windows

Replacement windows are designed to fit inside existing window frames after the old window's sash and hardware are removed.

Defining Feature

Unlike new construction windows, replacement windows do not have a nailing fin. Instead, they are designed to fit within an existing window frame and secured with screws that go through pre-drilled holes in the window jambs.

The Replacement Window Benefit

The obvious benefit of replacement windows is that they are easier to install. And since they do not require installation teams to remove exterior materials, the installation process is faster, less invasive, and more cost-efficient.

When to Use Replacement Windows

Replacement windows are ideal upgrades in the following scenarios:

• Your existing frames are in solid structural condition
• You want upgraded features but do not want to change window size
• You do not want to replace the interior and exterior trim
• You need a cost-effective upgrade with minimal disruption

Installation Process

The installation process is relatively straightforward with replacement windows. The process begins by removing the old window sash while keeping the existing frame. Next, the replacement window is inserted into the opening, shimmed to ensure it is plumb, and then secured with screws. With the window secure, any gaps are filled with insulation before creating a weather-tight seal around the exterior with caulk.

All in all, it’s a minimally invasive process that generally takes no more than a day, depending on how many windows you have.

Meet Your Perfect Window Match

Ready to upgrade your view? Whether you're building new or renovating an existing home, we offer a wide selection of new construction and replacement windows. And we'll even install them for you. Book a free in-home consultation to discuss your next project today!