How Long Do Windows in a House Last?

Glazier repairing a window

Windows are a key part of any house. They let in light and air, and they can add a touch of style to your home. But how long do house windows last? And when should you replace them?

Here’s what you need to know.

How Long Do House Windows Last On Average?


The average lifespan of a house window is about 20 years. But this number will vary depending on the type of window, the quality of the materials, and how well it’s been maintained.

For example, wood windows will last 15-20 years, while aluminum windows can last up to 45 years.

Window Replacement – When Is It Necessary


There are a few signs that it might be time to replace your windows, even if they’re still technically functioning.

If you can feel a draft coming through the windows, that’s a sign that they’re no longer sealing adequately and need to be replaced.

If you see condensation or frost building up on the inside of your windows, that’s another sign that they’re no longer doing their job properly.

And if you find yourself having to constantly prop open or close your windows to regulate the temperature in your home, it’s time for new windows.

Also, look for:


  • Water damage or leaks
  • Cracks or chips in the glass
  • Missing or damaged seals
  • Drafts or excessive condensation

Choosing the Right Windows for your Home


When you’re ready to replace your windows, there are a few things you’ll need to consider.

First, think about the material you want your windows to be made from. Wood, vinyl, and fiberglass are all popular choices.

Then, decide what style of window you want. Do you want double-hung windows that open from the top and bottom? Or casement windows that open from the side?

And finally, think about the energy efficiency of the windows you’re considering. The most energy-efficient windows will have a low U-factor and a high solar heat gain coefficient.

Replacing your windows is a major investment but can pay off in the long run. Not only will new windows make your home more comfortable, but they can also help you save money on your energy bills.

How to Maintain your Windows for Optimal Performance


Even the best quality windows will eventually need to be replaced. But there are a few steps or precautions you can take to extend the life of your windows and get the most out of them.

First, make sure to clean your windows regularly. Use a soft cloth and pour some mild soap to avoid scratching the glass.

Second, inspect your windows regularly for any signs of damage, like cracks or chips. If you find any damage to the window, have it repaired as soon as possible.

Finally, don’t forget to caulk and weatherstrip around your windows to help them seal properly.

By pursuing these simple tips, you can help your windows last longer and keep your home comfortable all year round.

The Benefits of Installing New Windows


For deciding whether or not to replace your home’s windows, there are, of course, many factors to weigh. 

Though ultimately, the decision comes down to two things: cost and benefits.

The Cost of Replacing Your Home’s Windows


The cost of replacing your home’s windows will vary depending on several factors, including the type and number of windows you need, the style of windows you choose, and whether or not you hire a professional to install them.

The average cost or price to replace a single window is $300 to $700. But if you’re replacing multiple windows, the price will quickly add up. For a typical home with ten windows, the cost of replacement can range from $3,000 to $7,000.


Of course, the cost of replacing your windows is only part of the equation. You also need to consider the benefits.

The Benefits of Replacing Your Home’s Windows


There are many benefits to replacing windows, including:

  • Improved Aesthetics: New windows can completely change the look of your home from the inside and out.
  • Energy Efficiency: New windows are much more energy-efficient than older models. This means lower utility bills and a smaller carbon footprint.
  • Enhanced Insulation: Properly insulated windows keep your home warmer in the winter and cooler in the summer. This can lead to better comfort and lower energy bills.
  • Easy Maintenance: New windows are easier to clean and require less maintenance than older windows.

Conclusion: How long do House Windows Last?


The answer to this is actually based on several factors, including the type of window, the quality of the window, and how well it’s been maintained. But on average, most windows will last between 15 and 20 years. However, your windows could last even longer with proper care and maintenance.



Dorian Dandan

Dorian Dandan

I am a professional glazier in Sydney providing glass replacement services and also the director of DOS Glass Replacement