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Heritage slim double glazing

Our heritage slim double-glazed units are the perfect solution for
listed and historic buildings all across London: whether in Holloway,
Hornsey, Highgate, Walthamstow or Notting Hill.

The benefits of double glazing; the timeless appearance of the original window

When it comes to restoring listed and heritage buildings, you can’t afford to make ill-advised choices. Many a beautiful period property has been spoiled with the addition of ugly, bulky, modern materials that destroy the character and charm of the original architecture.

With our heritage slimline double glazing, you’ll find the perfect replacement. You’ll never be able to tell the difference, but your property will benefit from all advantages that hardwood double glazing brings: thermal and sound-insulation, draught proofing, structural strength and resistance to condensation.

What makes up our slimline sash windows?

Our heritage double glazing employs a slimline double-glazed insulated unit, which consists of two panes. The space between the gap ranges from 4mm to 8mm as standard (up to 16mm) and is filled with an inert gas (argon or krypton). This gas helps to keep the warm in and the cold out.

As with our noise-reducing glass, all of our windows and doors are bespoke handmade using traditional joining methods and can also incorporate our noise reducing glass range.

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RECOMMENDED BY 100% OF CUSTOMERS ON WHICH? TRUSTED TRADERS

All round Superb

" I used London Sash Windows and Doors to replace some old timber sash windows. They were superb to deal with, from start to finish. The initial meeting was very efficient. They explained to me that it was not necessary to replace the complete window box, which led to a significant cost saving. The team that arrived on the day were friendly, got the job done swiftly and left my flat cleaner than when they arrived. The windows have substantially reduced noise, the flat is much warmer and my condensation issues are fixed. I wouldn't hesitate to recommend London Sash Windows and Doors to anyone."

Quality Installation

" I used London Sash Windows and Doors to replace some old timber sash windows. They were superb to deal with, from start to finish. The initial meeting was very efficient. They explained to me that it was not necessary to replace the complete window box, which led to a significant cost saving. The team that arrived on the day were friendly, got the job done swiftly and left my flat cleaner than when they arrived. The windows have substantially reduced noise, the flat is much warmer and my condensation issues are fixed. I wouldn't hesitate to recommend London Sash Windows and Doors to anyone."

Enjoy highly versatile, bespoke windows without sacrificing their traditional qualities

The sheer versatility of our slimline heritage units allows us to provide sash windows with curves and specialist bespoke shapes.

Our traditional, solid glazing bars keep everything held together nicely. Unlike stick-on glazing bars, they will not fall off, quickly become defective or succumb to rot, providing true value for money throughout their lifespan.

Prices from

Heritage Slim Double Glazing in our new, bespoke, painted (hand or sprayed) sashes:
Prices start at approximately £1,375 incl. VAT per window, for an average-sized window

Don’t leave your heritage windows and doors to deteriorate over time. Contact London Sash Windows & Doors on