Will Double Glazing My Windows Make Them Harder to Open?

When considering the upgrade to vacuum insulated units for your sash windows, a common concern is whether the additional weight will make your windows more difficult to open.

This concern is completely valid—after all, these new insulated glass units can indeed weigh nearly twice as much as your original single glazing.

However, I’m happy to explain why this won’t become a problem when the work is done professionally.

Understanding the Weight Difference

In fact, vacuum insulated units are comparatively heavy, as compared to single glazing, and are generally almost two times as heavy.

The extra weight comes from the glass pane itself and the vacuum-sealed space between the two panes. Hence, it is common for customers, upon seeing and handling a sample, to have initial concerns that they may make their larger windows difficult to operate.

Still, after the first weight reaction, it becomes clear to them that other counterbalances would be fitted to the sashes, putting their minds at ease.

The Counterbalance Solution – additional sash window weight

Professional window restoration specialists address this weight increase through proper counterbalancing.

They adjust the existing sash weight system by adding extra counterweights to match the new glass weight perfectly.

During professional reglazing, the entire weight and pulley system gets a thorough check-up and tune-up. When done right, your windows should work just as smoothly as before—maybe even better.

The Complete Restoration Process

Quality reglazing is not just about replacing glass.

The whole process involves replacing old, worn-out sash cords with new ones stronger to handle heavy glass.

Pulley systems are almost always the culprits behind sticky windows that refuse to open; they would be cleaned, repaired, or replaced if necessary. All moving parts are then lubricated and adjusted to ensure smooth operation.

Professional reglazing services ensure that your windows can still effectively function with high energy efficiency gains. This is in response to weight increase correction coupled with complete system refurbishment. Your exquisite old windows will continue to have near-modern operation but provide comfort and efficiency.