Best Replacement Windows of 2025

Vinyl windows make up the largest segment of the replacement window market. They don’t need to be painted or stained, but you’ll probably find fewer options when choosing colors and hardware.

Most wood window frames are made of solid wood covered on the outside with another material for protection from the elements. They’re generally the most expensive type of window, available with many finish and hardware options.

Typically made of wood fiber and a thermoplastic resin, composite windows look more like wood than vinyl windows do, and they generally cost less than solid wood windows.

For our tests, we order 3x5-foot double-hung windows from a variety of manufacturers. Our previous window testing has found that most windows stand up well to simulated aging, so we now focus instead on how well a window can withstand the elements.

After installing each window in a wooden frame, test engineers seal one side before using a specially made device that simulates wind. They raise the airflow velocity to 25 mph and then 50 mph, and measure air leakage with a flow meter. They run this test at 0° F and 70° F to evaluate whether a frame holds up even as materials contract and expand at varied temperatures.

To test rain resistance, we simulate windblown rain by pelting the window with 5 gallons of water per square foot per hour. Windows that earn an excellent rating in this test can withstand simulated winds up to 74 mph, or gale-force winds. The worst windows started leaking when winds reached about 35 mph.

There are two main types of replacement windows, and the one to get depends on the condition of your existing window frames and your taste.

• An insert or “pocket” replacement window fits into your window frame; there’s no need to remove molding on the inside or trim on the outside. Because it’s essentially a frame within a frame, an insert lets in a bit less light. Inserts can be bought in stock sizes, but custom inserts offer more style and features as well as a more accurate fit for better energy efficiency.
• Full-frame windows, also called new-construction windows, are mass-produced in standard sizes. A contractor will remove the old frame—as well as outside trim and sometimes siding—and make any needed changes to the opening before installation. If your window frames aren’t in good condition—or if you want to change the size or shape of the opening—you’ll need this kind.