Can I double-glaze an existing window?

Double Glazed Windows

“Can I add double-glazing to my existing window?”, is one of the most common questions our clients ask. Double-glaze is often associated with energy efficiency and improved comfort, and the answer is yes, it is possible to double-glaze many existing windows. However, it’s important to consider all the implications to ensure you achieve the desired outcome. In this article, we will guide you through the ins and outs of double-glazing existing wood windows.

The first question to ask yourself is why you want to invest in double-glazing. Are you looking to make your home warmer, quieter, or more comfortable? 

Understand Your Priorities

Assess the condition of your existing windows

Before installing double-glazing, ensure that your windows are in good condition. Adding double-glazing to poor-quality, draughty windows will not fully realize the benefits and may be a waste of money. It’s best to address any necessary repairs or improvements alongside the double-glazing installation.

 

Address draughts before double-glazing

Even a good-quality window can be draughty, especially older double-hung windows. It’s important to address any draught issues before installing double-glazing to maximize its effectiveness. If there are air gaps around the window, it will compromise the benefits of the fancy glass.

 

Consider ventilation needs

Ensure that the double-glazing installation does not prevent you from opening windows for ventilation, especially during summer. While it’s important to make your home warmer in winter, fresh air circulation is also essential. Some retrofit options for double-glaze may permanently close parts of a window, so consider this carefully before proceeding.

 

Evaluate cost-effectiveness

Double-glazing retrofit can be an expensive option. Consider whether the same amount of money could be better spent on alternative measures to achieve the same outcome. Explore other energy-efficient solutions and weigh their cost-effectiveness against double-glazing.

 

Assess window size and strength

Determine if your existing windows are large enough and structurally sound to support double-glazing. If the windows were originally designed for single-glazing, the depth of the timber may not be sufficient for a proper double-glazed unit. Additionally, joints, balances, and hinges may require reinforcement or replacement to accommodate the added weight.

 

Adjust counterweights and balances

For existing double-hung windows, ensure that the counterweights and balances are properly adjusted. If you have ropes and pulleys or coil balances, they may need reinforcement or replacement to ensure smooth operation with the added weight of double-glazing.

By considering these factors, you can make an informed decision about double-glazing your existing windows. Consulting with professionals in the field will help you assess the feasibility and cost-effectiveness of the project. Remember, the goal is to improve energy efficiency and comfort while maintaining the functionality and aesthetics of your windows.

Contact us today at info@royalglass.co.nz or call 0800 769 254 to explore our range of frameless glass products and receive expert guidance if you can double glaze existing window.