How Long Do Windows Last and When Should You Replace Your Windows?

Worn-out windows can leave you feeling weathered

Basset hound at home looking out the window
Photo: Cavan Images / Cavan / Getty Images
Basset hound at home looking out the window
Photo: Cavan Images / Cavan / Getty Images
Highlights
  • Windows can last 15 to over 50 years.

  • Warped frames, gaps, and cracks can be signs of old windows.

  • You should consider the cost of repairing vs. replacing windows.

  • Replacing a window costs around $100 to $750.

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If you’re cleaning your windows and notice a little draft, you may be wondering if it’s time for replacements. Although windows are designed to last a long time, natural wear and tear can cause problems, including drafts or water leaks. So how long do windows last? It depends on a few factors, and there are several signs to keep an eye out for that can tell you it’s time to call a local window company to repair or replace your windows.

How Long Do Windows Last?

Windows can last anywhere between 15 and 30 years, with glass lasting around 20 years and frames lasting up to 50 years on average. Windows naturally wear out over time, which can lead to air or water leaks as the window seals break down. 

Several factors can determine the life span of a window, from the type of frame and glass to the local climate to how the initial contractor installed the window. It’s best to shop for windows with warranties that are at least 10 years long (or ideally 20 years) and look for warranties that will help cover any replacement parts if the window parts prematurely fail.

Life Span of Different Window Materials

Bright room with white window open
Photo: ZenShui / Sigrid Olsson / PhotoAlto Agency RF Collections / Getty Images

The window frame materials play an important role in how long windows last. Improper installation or maintenance can lead the frame to warp, rust, or crack, causing drafts, water leaks, and other costly damages. 

Fortunately, though, window frames can last decades when installed correctly and cared for over the years. Window maintenance, like keeping the window glass and frame clean and lubricating the moving parts, can help you get the most out of your windows. 

Here’s what to expect from the life spans of different window frame materials:

Wood

Wood frames will last well over 20 years, but you’ll need to repaint or seal them every few years to give them better protection against the elements. Otherwise, wood frames can be susceptible to rotting, warping, or cracking.

Vinyl

Vinyl window frames will last about 20 to 40 years, depending on your climate. Vinyl windows are easy to care for, as you don’t have to frequently refinish them. However, they are vulnerable to extreme cold and hot temperatures, which can cause the material to warp.

Aluminum

Aluminum window frames have a life span of about 30 to 45 years with regular maintenance. They don’t require a lot of TLC, but cleaning with non-abrasive cleaners and soft cloths is the best way to get the most life out of aluminum. Aluminum window frames will not rust, which makes this material more suitable for windows than other metals.

Fiberglass

Fiberglass window frames are increasingly popular for their durability. This material can last over 50 years and is known for being energy-efficient despite requiring little maintenance outside of regular cleaning and lubrication. Like vinyl, fiberglass is also not vulnerable to extreme temperatures, but fiberglass does come at a higher price point.

Signs It’s Time to Replace Your Windows

5 indicators for when to replace your windows, including electric bills being higher than normal and faded floors and furniture near windows
Photo: Klaus Vedfelt / DigitalVision via Getty Images

Although most windows will last for decades, there are some signs to look out for that can tell you when it’s time to start choosing replacement windows. When your windows aren’t keeping out the elements as well as they once did, it’s usually a sign that they need an upgrade. Otherwise, you risk paying higher utility bills or paying for costly repairs due to water damage.

Condensation

It’s natural for there to be condensation on the outside of the window, but if you notice condensation on the inside of the window glass or between two window glass panes, it could mean that the window seals are failing, which will require a window replacement. 

Cracks

When the kids throw a baseball a little too hard and hit the window, it’s time to replace the glass. Cracked windows can let in drafts or water or could fully break sooner than you expect. You may also notice cracks or damage on the frame. For the most part, frame cracks alone shouldn’t cause problems. In wood, however, cracked frames could lead to wood rot if exposed to moisture.

Drafts

If you feel air flowing around the window sash even when the window is fully closed, it means the seal is weakening or the frame has warped enough to create gaps. Drafty windows will let in cold winter air or hot summer air, and you’ll be throwing money away as your HVAC system has to work harder to keep your interior at a comfortable temperature.

Faded Floor or Furniture

Older windows without protective UV treatments aren’t able to block harmful UV rays from sunlight. As a result, the floor and furniture around your windows may look faded. That could mean it’s time to upgrade your windows to newer models with a UV-blocking treatment, or you can consider updating your windows with an add-on film that blocks UV rays.

High Electric Bills

Even if you don’t feel drafts around the window, there could be other signs that you need to replace your windows. If your window seals are worn out or there are gaps around the windows, the HVAC system will run less efficiently, leading to higher electric bills. (Just keep in mind that higher electric bills could also be a sign of other problems, like a damaged HVAC system or aging appliances.)

Repairing vs. Replacing Windows

Workers installing new windows in the house
Photo: dima_sidelnikov / iStock / Getty Images Plus / Getty Images

When considering whether to repair or replace a window, keep the age of the window in mind. A broken seal or cracked glass can be repaired without replacing the entire window. On the other hand, if the window is over 20 years old, it might be worth the higher cost to replace the window rather than paying for multiple repairs to try to fix an old window. 

Cost to Replace Windows

Window replacement costs around $100 to $750 for each window. Upgrading to energy-efficient windows or windows with better soundproofing may cost more upfront, but they can save you money each month on energy bills and may have a longer life span. For example, triple-pane windows cost around $300 to $2,750 per window, and these windows can last well over 30 years with proper care.

Cost to Repair Windows

You’ll likely spend between $175 and $610 on window repair costs for each window. However, your costs will depend on the type of damage, the extent of the damage, and the typical cost of labor in your region. Common repairs you may need include fixing a broken latch, repairing a seal, or replacing a glass panel that’s cracked or broken.

Frequently Asked Questions

It’s usually best to replace all windows at once. Replacing windows can take several weeks, so the process will be much longer overall if you only replace one or two windows at a time. However, replacing multiple windows at once can be expensive. Also, you may just need to replace a single window due to damage, which can be handled on its own rather than replacing everything at once.

Late spring through early fall is the best time of the year to replace windows. Ideally, you’ll want warm temperatures and minimal rain. Demand can be high just before summer and winter, though, so be sure to schedule well in advance to get your windows replaced before extreme temperatures arrive.

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