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Can I fit better-insulating glass in my current window frames?

If the glass in your windows needs to be replaced, it might also be time to replace the window frames. But what if you don’t have the budget for that right now? Is it possible to only upgrade the glass in the existing window frames? Read this article and find out.

If you’re thinking about switching to glass with better insulating properties, it’s advisable to also replace your window frames with ones that provide better insulation thanks to improved gap sealing and multi-point locks. This is definitely worth considering if your window frames need replacing within ten years. If you don’t have the budget for this, you can keep the existing frames if:
 

  1. The frames are in good condition
  2. The frames are strong enough to support the weight of the new glass
  3. The frames are sufficiently sealed
  4. The frames are thick enough (after the grooves have been routed, if applicable)
  5. The hinges are strong enough to support the weight of the new glass

This article was published on 12 October 2023. Unless expressly stated otherwise, any information you consult or obtain here is entirely without obligation and for information purposes only. This information applies exclusively to Flanders.

It will be updated regularly in order to be as up to date as practicable, though no guarantee is given to that effect. KBC Bank NV does not provide any guarantee as to whether these figures are up to date, accurate, correct, complete and/or suitable for a particular purpose of this information. The information provided here does not constitute advice or an offer to sell products or services and is not intended for commercial use. You remain fully responsible for any and all consequences of any use you make of it. The intellectual property rights to the information, publications and data provided here are vested in KBC Bank NV or in third parties, and you are required to refrain from infringing these rights. Any transfer, sale, dissemination or reproduction of this information is prohibited without the express prior written consent of KBC Bank NV.