Reversible, internal and requiring no building-regulations approval — secondary glazing is the conservation-friendly way to insulate and soundproof listed and period windows without altering the originals.
Our most popular choice for listed building windows is the Balanced Vertical Slider Secondary Glazing. Vertical sliding units designed to accompany sash windows. Self-supporting panes stay in place at any chosen position.
Configure your exact windows online in 60 seconds, with our launch discount applied automatically. Supply-only or fully fitted — your choice.
Start my instant quote →Or call 0800 088 6341 · email sales@secondarywindowsglazing.com