A super-slim double hinged unit with single-handle operation — slim sightlines across a double opening.
Best for: wide period openings where slim sightlines matter.
Secondary glazing adds a discreet second pane inside your existing window — cutting noise by up to 80% and heat loss by up to 60% without replacing or altering the original frame. The double hinged unit · slimline is our recommended unit when you need wide period openings where slim sightlines matter.
Price depends on size, glass and finish. Our online configurator gives an instant price on standard sizes, or a fast bespoke quote on larger and special units — try it for a figure in about 60 seconds.
Yes. Secondary glazing is internal and fully reversible, so it needs no building-regulations approval and does not affect listed or conservation status.
Both. Choose supply-only, or add installation at £90 per window. Supply-only orders can add an optional site survey for £250.
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