Slimline secondary glazing for listed buildings, period properties and rental flats
Secondary glazing is the ideal solution where you can't replace the primary window — listed buildings, conservation areas, rental properties, and period homes with original sash windows. We install slim, virtually invisible aluminium-framed secondary units behind your existing windows, delivering noise reduction up to 50 dB and a 60% improvement in thermal efficiency, without altering the building's appearance.
A selection of recent secondary glazing installations across the UK.
We measure existing reveal depths and assess the primary window's condition. Our surveys are accepted by listed-building officers and planning departments.
Each unit is made to fit your exact reveal — slim aluminium frames in white, brown, black or RAL-matched colours. Glass options include acoustic laminated and Low-E thermal.
Installed entirely from inside the property with no disruption to the original window. Most installations are completed in a single day.
We hand over with a demonstration of opening, removal for cleaning, and trickle ventilation. All units have a 10-year warranty.
We install secondary glazing from our Birmingham facility to every corner of the UK. Find your area below.
Free survey, fixed-price quotes, no pressure sales. Call us, message on WhatsApp, or fill in the form — we typically respond within an hour during working days.
Tell us about your project — we'll come back with a fixed-price quote within 24 hours.
