Next Generation Sash Windows - The Quality you deserve
Let our windows enhance your home
We have excellent reputation as a local government double glazing contractor, supplying and installing a variety of products throughout London. This has enabled us to develop a strong network of suppliers and a large team of reliable fitters to install your windows. We are continually researching the market to ensure we are offering our clients the latest innovations and high-quality items.
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About Us
Next Generation Sash Windows by MJB Trading LTD
MJB TRADING LTD is a family-owned company with more than a decade of experience in the industry. All work is guaranteed for ten years and Next Generation Sash Windows is a recognized trademark.

More about sash windows
A sash window is composed of two movable panels, or “sashes”, which form the frames for the glass panes. These panels move up and down in vertical grooves, one in front and one behind, counterbalanced by lead weights on cords or spring balances. The sliding sash can be opened from the top, bottom, or both directions. They have no outward swing in the traditional sense, although some modern variants tilt in and out for easy cleaning.
When we fit sash windows we use cotton cords with a nylon core to which we attach the lead weights. This makes the windows easier to operate. Today, the windows most often installed are double-glazed timber sash windows.
Traditional wooden sash windows have been popular all over London and often need to be replaced. Contact your local council before making any decisions about sash window replacements to ensure you are following all regulations. If you require technical drawings, please notify us and we will be pleased to supply them.
Services
Double-glazing sash replacement
This service includes the refurbishment and repair of the boxes, including the replacement of all cords, ironmongery, and beadings, as well as the installation of new double or single glazed sashes equipped with draught excluders…
Refurbishment of sash windows, casements and doors
The service includes refurbishing and, if necessary, repairing the boxes, replacing all cords, ironmongery, and draught excluder-equipped beadings…
Draught-proofing sash windows, casement windows, and outside doors
Replacing or installing new draught excluder-equipped beadings. Occasionally, your sash windows do not require replacement…
Sash windows maintenance
Replacement of snapped sash cords, spring balances, pulleys, lifts, and fasteners, among other things…
Bespoke wardrobes, cupboards and cubbyhole doors, interior doors
Cabinets made of wood add a touch of contemporary beauty to your home…







