Replacement vs. New Construction Windows

house with white siding and black windows with blue sky

Replacement Windows

Replacement windows are exactly what they sound like: they replace a window in an existing frame.

When are they used? Replacement windows are used to replace an old window without replacing the frame that attaches to the wall. There are no mounting fins to attach to the house underneath siding or trim, so they simply slide into the existing frame. This can be done at any time and doesn’t require an invasive remodel of the exterior walls.

Can they be integrated into a house’s WRB (Water Resistant Barrier)? Replacement windows cannot be integrated into the home’s Water Resistant Barrier because they attach to an existing frame.

Brian, Home Exteriors Technical Manager – Windows and Doors, shares the process for replacing or repairing your homes’ windows.

New Construction Windows

New construction windows have mounting fins around the frame that attach to the house’s framing.

When are they used? New construction windows are installed when there is no siding or trim impacting the installation (typically during an exterior remodel or brand new construction). During this time that there is a clear opening, the mounting fins around the window frames can be attached to the structure and connected to the entire WRB.

Can they be integrated into a house’s WRB (Water Resistant Barrier)? The process of installing new construction windows requires the mounting fins to be attached to the house’s framing, which makes the window a part of the entire home’s Water Resistant Barrier! This also means it is also the most water-tight option.

Both Replacement & New Construction Windows

You can’t necessarily go wrong with either option but depending on your budget and project, one may make more sense! They do have a few things in common that may help narrow down your options.

What styles are available in both types of windows? Both replacement and new construction windows are available in a range of styles like single and double-hung, bay, and shaped with options for material and color finishes!

Should I use replacement or new construction windows for my home project? For homeowners that choose to undergo a large remodel including siding and windows, we suggest new construction windows so that every piece of your building envelope will be part of the same water-tightening system.

For a typical window replacement project with no damage to the window frame or walls, a simple replacement window is the way to go!

Do you still have some questions about the differences between the two? We have a team dedicated to windows and doors that are excited to help you decide what is right for your project! We would love the opportunity to talk with you about our process for replacing windows as well as show you past projects that we have done. Together, we can find the best solution for your home!