In Canada, the construction sector generates about 4 million tons of waste each year, according to Statistics Canada. On the other hand, Natural Resources Canada estimates that between 25% and 35% of a home’s heat loss comes from doors and windows. So, is it better to repair your windows to keep them out of the landfill a little longer, or to replace them to improve energy efficiency? Stay with us as we explore this question with Charles-Vincent Trépanier, General Manager of Basco Portes & Fenêtres!

In today’s context, with energy-efficient renovations being a major priority and various government programs promoting energy savings, the question is worth asking: is it more eco-responsible to repair existing windows or replace them altogether?

In the vast majority of cases, repairing windows proves to be the most environmentally friendly option. Not only does it avoid the waste created by removing and disposing of old windows, but repairing damaged parts requires fewer resources and less energy than manufacturing and installing new ones. Just consider these three actions:

1. By fixing dried-out and cracked seals, you reduce air leaks and, at the same time, lower energy bills. This also improves occupant comfort by minimizing unpleasant drafts.
2. By repairing faulty mechanisms, you remove a daily inconvenience, which helps reduce the temptation to replace the windows.
3. By replacing the insulated glass units, the thermal panes, you can significantly improve thermal insulation without a full replacement.

These actions extend the life of existing components, save money for homeowners, improve comfort for occupants, and reduce the amount of waste ending up in landfills. All of this is perfectly in line with the principles of the circular economy and sustainable development!

That said, there comes a time when repairing is no longer enough. If the windows have severely deteriorated wooden frames, for example, or if they are single-pane or allow too much air infiltration, then replacement becomes the better option. Modern double- or triple-glazed windows with thermal breaks offer excellent energy performance.

They can significantly reduce heat loss, lower heating needs, and consequently decrease CO₂ emissions linked to a home’s energy consumption. Over the long term, these advantages can offset the environmental footprint of their production.

In conclusion, repairing is often the more ecological choice in the short term, especially if the windows are still structurally sound. Replacement becomes justified when the energy efficiency gains are significant—provided that durable materials are chosen and old units are recycled. The ideal solution is to carry out a complete diagnostic before making a decision, a service we are proud to offer at Basco Portes & Fenêtres!

If you have any questions about your windows or the overall energy efficiency of your home, don’t hesitate to contact us. Our evaluators and partners are here to help you make the best decisions for your needs—whether that means extending the life of your windows or taking advantage of potential grants for replacement!