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Sash window specialists covering Kent, London & the South East · We’ll beat any written quote ★ 5.0 on Google · 84 reviews Mon–Fri 9am–5pm
Advanced Sash Windows logoADVANCED SASH
WINDOWSSash window specialists · Maidstone
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01622 470019

Sash window repair and restoration services

Everything we do to timber sash windows, with real prices. Based in Maidstone, working across Kent, London and the South East — and we will beat any like-for-like written quote.

Get a free quote Call 01622 470019
★★★★★ 5.0 from 84 Google reviews We’ll beat any like-for-like written quote Insured to £5m · 10-year draught-proofing guarantee · free survey

We repair, draught-proof and restore original timber sash windows rather than replacing them. Prices start at £80 + VAT for a timber splice and £280 + VAT for draught-proofing, up to £1,280 + VAT for a full restoration. Every job is surveyed free and quoted in writing.

Victorian red-brick building with draught-proofed white sash windowsDraught-proofingConcealed brush seals that stop draughts and rattles without changing how the window looks.From £280 + VAT → Sash window being lifted out of the frame to replace the sash cordsSash cord replacementSnapped cords replaced in waxed cotton and the weights re-balanced so the sash stays put.From £250 + VAT → Weathered timber sash window sill showing rot before repairRotten timber repairDecayed sills, rails and stile ends cut out and spliced in matching timber.From £80 + VAT → Freeing a painted-shut sash window with a knifeSticking & painted-shut sashesWindows that have not opened in years freed, eased and re-hung.From £100 + VAT → Period bay sash window with a window box, suitable for slim double glazingSlim double glazingDouble-glazed units fitted into your existing sashes for warmth and quiet.From £980 + VAT → Georgian red-brick terrace with fully restored white sash windowsFull restorationStrip, repair, re-cord, draught-proof and repaint — the complete job.From £1,280 + VAT →

Not sure which you need?

Send photos on WhatsApp or call 01622 470019 and we will tell you honestly what the window needs — including when it needs nothing.

We also take on commercial and subcontract work for councils, developers and property managers, and carpentry, painting and decorating alongside window work.

Areas we cover

Maidstone Tunbridge Wells Canterbury Faversham Gravesend Sevenoaks Bromley Greenwich
Warmer, quieter windows that open properly. Free survey, fixed quote — and we’ll beat any like-for-like written quote.
Get a free quote Call 01622 470019 WhatsApp us