old house with windows in need of replacement

Are you a Canadian homeowner wondering when to replace windows? Windows are essential to any home, providing natural light, ventilation, and insulation. Over time, your home’s windows may become worn out and deteriorate in terms of energy efficiency, comfort, and aesthetics. But when is the best time to replace them?

Below you will find 12 signs that indicate it may be time for a window replacement. By recognizing these signs, you can make an informed decision about when to replace your windows and ensure the comfort and efficiency of your home.

Increase in Energy Costs

A sudden increase in energy bills is one of the first signs that your windows may need replacing. 

Old or poorly insulated windows allow heat to escape during winter and hot air to seep in during summer. This forces your HVAC system to work harder, increasing energy consumption and costs. 

If you notice a significant rise in energy bills, consider replacing your windows with ones built for Canadian winters to improve energy efficiency.


Feeling drafts near your windows is another telltale sign they may need replacing. 

Drafts occur when the window no longer fits tightly or when there are gaps or cracks in the window frame.

Stand near your windows on a windy day to see if you can feel any cold air coming inside. If you do, it indicates that your windows are not providing proper insulation and should be replaced.

Remember, gaps and cracks in your windows aren’t only concerns during the winter months. 

These openings can also significantly impact your hydro bills during the summer. When hot air enters the home through these gaps, your AC unit will struggle to maintain a cooler indoor temperature. As a result, your energy consumption rises, and so does your costs. 

By addressing these gaps and cracks through window replacement, you can improve your home’s energy efficiency year-round and reduce the strain on your cooling system during hot summer days.

Difficult Window Operation

Windows should open and close smoothly without much effort. If you find that your windows are becoming increasingly difficult to operate, such as sticking, jamming, or not staying open, it’s a sign that the mechanisms are worn out or damaged. 

This situation is not only inconvenient, but it also compromises the functionality and security of your windows. 

By replacing your windows, you can regain peace of mind, knowing that your home is well-protected and your windows operate effortlessly.

Fog or Condensation

old window in need of replacement with condensation on it

Discovering moisture or fog on the surface of your windows is a clear indication of underlying issues. It could signify a broken seal or poor insulation, allowing moisture to penetrate between the panes. This obstructs your view and compromises your windows’ energy efficiency and performance. 

Immediate attention should be given to address this problem through window replacement to restore clarity, insulation, and overall window functionality.

Moisture Build-Up Between Window Panes

Like foggy windows, moisture build-up between the panes is a clear sign of seal failure. When moisture enters the space between the glass panes, it can lead to mould growth, reduced insulation, and a compromised window structure. If you notice moisture or condensation build-up that cannot be cleared, it’s time to consider replacing your windows.


Leaking windows are a cause for concern, as they can lead to water damage and mould growth. Check your windows during or after rainfall for any signs of water infiltration. If you observe water stains, peeling paint, or swollen window frames, address the issue as soon as possible by replacing the windows.

Single-Pane Windows

If your home still has single-pane windows, upgrading to more energy-efficient options is highly recommended. Single-pane windows offer poor insulation and allow heat transfer, resulting in energy loss and discomfort. Upgrading to double or triple-pane windows with Low-E coatings can significantly improve your home’s energy efficiency, reduce noise transmission, and enhance overall comfort.

Cold Glass

Do you notice cold glass when you touch your windows during colder months? The cold glass indicates that your windows are not providing adequate insulation. Modern windows often feature low-conductivity materials and advanced glazing technologies that reduce heat transfer. If your windows are not keeping the cold air outside, it may be time for a replacement.

Decaying or Damaged Frames

old window frame that is decaying and in need of being replaced

Inspect your window frames for signs of decay, rot, or damage. Wooden frames are particularly susceptible to moisture damage, leading to structural issues and compromised window performance. 

Damaged frames impact the window’s functionality and detract from your home’s aesthetics. If you notice significant frame deterioration, it’s wise to consider replacing the windows.

Outside Noise

Windows should provide a barrier against exterior noise, helping to create a peaceful and quiet indoor environment. If your current windows do not effectively block out outside noise, it could be due to their age or insufficient insulation. 

Upgrading to windows with soundproofing features can significantly reduce noise infiltration and enhance your home’s comfort.

Interior Fading

Did you know that UV light can fade interior surfaces like flooring, furniture, and curtains? Older windows with inadequate UV protection may allow harmful UV rays to enter your home, causing fading and damage to your valuables. By replacing your windows with options that feature low-emissivity coatings, you can minimize UV penetration and protect your interior furnishings.

Curb Appeal

Windows play a crucial role in your home’s curb appeal. If your windows are outdated, worn, or no longer complement the architectural style of your home, consider window replacement for an aesthetic upgrade. New windows can enhance the overall appearance of your home, increase its value, and make a positive impression on potential buyers.

Key Takeaways

Understanding when to replace your windows is essential for maintaining a comfortable and energy-efficient home.

If you identify one or more of the above signs in your home, it’s time to consider window replacement. 

At Energy Kingston Exteriors, our Kingston window replacement experts understand that upgrading to modern, energy-efficient windows can significantly affect your home’s comfort, reduce energy costs, enhance security, and improve aesthetics. 

Contact us to learn more about window replacement options or request a free quote today.