What Is Secondary Glazing

Preserve the heritage of your property whilst improving energy efficiency and security.

If you live in a listed building, you’ll know there’s a long list of pros and cons to living in a historically significant house. Most heritage homes present unique qualities, such as Tudor or Georgian features, standing out among newer architecture and often having superb locations. However, you may have to contend with strict planning regulations for minor improvements like new doors or windows, and most renovations will be impossible. Unfortunately, older houses also come with draughty, single-pane windows, making your home feel unsustainable by being difficult to heat and creating high energy bills.

Replacing double-glazing in a listed home is a balance between sustainability and preserving the property’s authentic features, and many authorities will favour prioritising the original windows. Replacing the windows entirely involves modifying the window frames, which can impact the building’s appearance. Thankfully, other options ensure you can save energy and increase your house’s security without compromising the property’s character.

The simplest solution is secondary glazing. This process involves placing single-glazed window panels behind the existing windows, creating a gap between them that provides a layer of insulation and reduces the heat moving from one side to the other.

Will my original windows still work? Secondary glazing doesn’t affect the use of your primary windows, which means they will still be fully functional. They adapt to most styles, including sash, sliding and casement-style windows. 

How will it benefit me? The biggest benefit is increased thermal efficiency, which can reduce energy bills by up to 10%. Adding secondary glazing also helps to reduce noise and improve security on your property.

What will it look like? Secondary glazing is slim and almost unnoticeable. It is recommended for heritage properties because it doesn’t interfere with the original architectural style and is very discreet.

What will it cost me? Secondary glazing is a less expensive option because it is quicker and more straightforward than installing double glazing.

Here at Thermaglaze, we cover all areas in Dorset, Wiltshire, and Somerset. Why not visit our relaxed showroom in Sutton Veny to see our products and discuss your needs with our friendly team? Contact us here.