Sash Window Repair and Restoration, London
Repair and restoration of timber box sash windows, including listed and heritage buildings.
Repair and restoration of timber box sash windows, including listed and heritage buildings.
GSD London is a specialist commercial painting and decorating subcontractor working for main contractors, quantity surveyors, property managers and private clients across London. Our sash window works cover survey, timber repair, overhaul and redecoration of timber box sash windows, including listed and heritage buildings. CHAS, Constructionline Gold, ISO 9001, ISO 14001 and ISO 45001.
Sash window repair and restoration is the survey, timber repair, overhaul and redecoration of traditional timber box sash windows so they run, seal and last, without replacing joinery that can be saved. Most Georgian and Victorian sashes fail in the same places: the cill, the bottom rail, the parting beads and the cords. Repair cuts out the decayed timber and splices or resin-repairs it; overhaul renews cords, pulleys and weights and eases the sashes; restoration brings the window back to a correct decorative finish.
On listed buildings and in conservation areas this is the approach the conservation officer expects, because it keeps the original fabric and avoids the consent risk of removal. Every window is referenced and recorded so the schedule can be approved before work starts and inspected against at handover. GSD London carries out sash window repair, refurbishment and restoration across London for main contractors, with draught proofing and glazing where the specification calls for them.
Broken cords, seized pulleys or sashes painted shut. An overhaul renews the cords and weights and eases the window so it runs as it was built to.
Decay where water sits. Cut back to sound timber and spliced or resin repaired, the window is saved rather than replaced.
Consent conditions usually require repair before replacement. A window schedule sets out what is repaired and what is renewed so it can be approved first.
Brush seals fitted during the overhaul cut draughts and rattle without changing the look of the window or the joinery.
Failed putty lets water into the rail and is the most common cause of sash decay. Reglazing and re-puttying is done as part of the repair.
Painting over decayed timber wastes the paint. Survey and repair first, then decorate, so the finish lasts the full cycle.
Each window is inspected and recorded, and a schedule of repair is agreed window by window.
Internal finishes are protected and access is agreed, internally and externally.
Decayed timber is cut out and repaired, and the sash mechanism is overhauled and eased.
Windows are prepared, decorated and inspected with the site team before handover.
Sash window overhaul, Repair Care timber repairs and full decorations.
View projectWindow repairs, overhauls and external decoration on an operational school.
View projectWindow overhaul and heritage decoration to historic joinery.
View projectWe work as a subcontractor to the main contractor or for private clients. The order sits under JCT subcontract terms or individual contracts with clients. Site rules, access, welfare and the programme are set by the main contractor, and our works are planned around the sequence already agreed on site.
We repair wherever the timber can be saved, cutting out the decayed section and splicing in new timber to match. Full replacement of a cill, bead or sash is only proposed where a repair would not last. Each window is recorded so the approach is clear before work starts.
Pricing follows the drawings, the specification and the schedule of works issued with the enquiry. Where the scope is not yet fixed we price on a provisional basis and confirm it once the survey is complete. Variations are agreed in writing before the work is carried out.
Yes. Repair and overhaul of the existing joinery is normally the approach required on listed buildings, and the schedule can be issued for approval before work begins. Where consent conditions apply, the method and materials are set out in writing first.
Each area is inspected with the main contractor site team before the protection comes down. Snags are recorded and closed out in the same visit where possible. Handover records, warranties and product data sheets are issued together as part of the completion pack.
We take immense pride in our distinguished clientele, a testament to the unwavering quality and excellence that defines GSD London. From heritage to prestigious businesses, our reach spans across the vibrant tapestry of London.
Our extensive roster of high-profile clients reflects not only our commitment to delivering exceptional painting and decorating services but also our ability to meet the diverse needs of discerning individuals and esteemed establishments. We are honoured to have contributed to the aesthetic transformation of some of London's most iconic spaces, and we continue to uphold the highest standards, ensuring that each client's vision is realised with precision and sophistication.
GSD has undertaken numerous projects for Quinn over the past few years, including flagship projects for the V&A Museum and Warburg Institute both in the range of circa £300,000. Happy to recommend.
GSD completed the communal redecoration package valued at £100,000 at the Marriott Mayfair Grand Residencies, a 5* hotel. The project was completed in a tight 12-week program with GSD working with us to deliver it to a high standard. There were several hurdles to overcome throughout the job due to client changes, but each change was dealt with professionally by the project team from GSD. After the contract completion, the client praised the attention to detail provided by GSD and their outstanding work ethic in meeting the high expectations/time constraints of the project
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GSD London Ltd
Company Number: 10543768
VAT Number: 261280131
Head Office
231 St John Street,
London EC1V 4NG
