Timber Sash Windows Restoration, Refurbishment & Repair  

At Barnsbury Joinery we provide a comprehensive timber sash window restoration and repair service. This includes upgrading the heat efficiency and reducing noise pollution of a building or home through repairs, draught proofing and restoration of your sash windows. With expert advise from our joiners and carpenters within our joinery and glazing workshops in Hertfordshire and Berkshire, we are equipped to manufacture and rebuild your sash windows to their original glory while keeping it's traditional look.

Problems commonly encountered with your timber sash windows include water ingress, decayed or painted shut windows, rotting sills (particularly on south and west elevations), draughts and damaged glass or putty. These timber sash windows have most likely been neglected for long periods of time, and now show signs of poor quality repair in the past, with filler being applied directly to damp and decayed timber, then painted over.

As a standard procedure at Barnsbury Joinery, we quote for refurbishment, in-depth repair and draught proofing. These go a long way to bringing a single glazed sash window to it's correct functionality and if painted correctly, should give you many more years of service. At Barnsbury Joinery we provide the following sash restoration service across London:

  • Remove old staff and parting bead and then remove top and bottom sashes​

  • Assess condition of the hardwood cill, box frame and external pointing

  • Re-balance sash weights to ensure smooth operation of both top and bottom sash windows

  • Assess condition of the top and bottom sash 

  • Renovate and repair top and bottom sashes, remove excess paint and repairing any damage putty where needed

  • Undercoat all exposed woodwork and caulk beading leaving the window ready for the decorator 

  • Fit new centre catch, sash-lifts and window locks as directed by the customer

Please see below a selection of timber sash windows we have repaired, restored and painted: 



























































































































To save time at Barnsbury Joinery we have implemented an online quote request system. Once we receive your request we will endeavour to contact you within 24 hours. If you require assistance or would like to discuss your requirements, please do not hesitate to contact us directly on 0207-1646305.


At Barnsbury Joinery we service all areas of London and surrounding areas. Including Islington, Hackney, Hampstead, Primrose Hill, Camden, Stoke Newington, Clapham, Angel, Canonbury, De Beauvoir Town and Clerkenwell. Please call us now to find out if we work in your local area.


UK - London 

UK - Hertfordshire

UK - Berks, London & South

UK - Belfast

EU - Amsterdam

AU - Melbourne VIC

AU - Sydney NSW

AU - Perth WA



Barnsbury Joinery Co.

UK Head Office 

Ripplevale Grove, 

Islington, London. 


Tel:   0207-1646305

Mob: 07399779872

Mob: 07913372092



Barnsbury Joinery Co.

Hertfordshire Head Office 

Blacksmiths Lane, 

St Albans. 


Tel:   0207-1646305

Mob: 07399779872

Mob: 07913372092

Barnsbury Joinery Co. © 2020 London's Leading Bespoke Joinery Company. All rights reserved.