Secondary glazing dramatically reduces heat loss through all windows, and creates an effective barrier against outside noise pollution.

Why secondary glazing?

All homes lose heat through their windows. Single-glazed windows are the worst culprits, with on average 50 per cent of the efficiency of double-glazed windows.
In our experience, old single-glazed sash windows are the least energy-efficient windows of them all. Over time, these windows warp which causes gaps to form between the seals. And, because of this, draughts can enter the property at will, causing heat to escape rapidly.
The trouble is, replacing single-glazed windows with new double-glazed or even triple-glazed windows is too costly an expense for many people. Or, it can be made impossible on older ‘listed’ properties, due to the restrictions imposed on Listed Buildings.
The solution to both issues is secondary glazing.
Secondary glazing is an economical and effective draught-proofing and insulation solution, that also vastly reduces the issue of outside noise pollution.

Our secondary glazing solutions

We can install secondary glazing on both fixed and hinged windows and on bay and sash windows. Secondary glazing is available for wooden and PVCu windows, and we have a wide range of styles to choose from with different sliders.
Secondary glazing is a popular glazing solution in Listed buildings and older properties that have single-glazed sash windows. It is relatively easy to install, and our expert team will design your secondary glazing so that it complements your home’s design.

How does secondary glazing work?

Simply, secondary glazing is installed behind your existing window internally, to form a sealed barrier between it and your home. The gap between the secondary glazing and your window can be as little as four inches for maximum efficiency.
The additional layer of glass, and the air pocket between it and your window, creates an insulating barrier to protect against heat loss, draughts, and noise pollution.
In terms of efficiency, research conducted by the Glasgow Caledonian University’s Centre for Research on Indoor Climate and Health suggests that secondary glazing can improve the thermal efficiency of single-glazed windows by as much as 77 per cent.