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Sash Windows Restoration, Refurbishment & Repairs in Balham

At Barnsbury Joinery we provide a comprehensive sash restoration service, upgrading the thermal and acoustic performance of a building through in-depth repairs, draught sealing and restoration. With the support of our joinery and glazing workshops, we are equipped to manufacture any necessary components to rebuild your sash windows to their original detailing.

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

As standard, we will quote for refurbishment, in-depth repair and draught seals. These go a long way to bringing a single glazed window to proper functionality and if carefully painted, should give many more years of service. At Barnsbury Joinery we provide the following sash restoration service across London:

  • Remove beading and carefully remove top and bottom sashes

  • Assess condition of sill, box frame and external pointing

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

  • Assess condition of top and bottom sash 

  • Renovate top and bottom sashes, place off excess paint and repairing putty damage where needed

  • Replace old pulleys with modern brass pulleys incorporating a sealed ball bearing unit, resulting in smooth and positive action in operation.

  • Install concealed draught proofing system 

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

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

  • Full painting service available 











To save time at Barnsbury Joinery we have implemented an online quote request system. Once we receive your request we will endeavor 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 and we will be happy to help you.


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

Timber sash window repair & replacement in Balham
Timber sash window repair & replacement in Balham
Timber sash window repair & replacement in Balham
Timber sash window repair & replacement in Balham
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