Bespoke timber sash windows in a London townhouse
London Sash Windows Replacement and Repair Specialist
Upgrade Your Sash Windows Without Losing Their Character.

Bespoke timber sash windows for London homes. Improve insulation, security and value, crafted to match the original character of your property.

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  • Sash window specifications
  • Casement window specifications
  • Heritage timber sash windows
  • Vacuum glazed sash windows
  • Triple glazed sash windows
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For architects & specifiers

Timber windows, specified properly.

Section drawings, tested performance figures and conservation-area detailing for every timber sash and casement profile we manufacture.

Specification deliverables

  • Scaled section drawings in DWG and PDF
  • U-value and thermal performance calculations
  • Acoustic test data for glazing build-ups
  • Listed Building Consent drawing packages
  • NBS-style specification clauses on request
  • Finish, ironmongery and glazing schedules

Technical specifications by profile

  • Sash window specifications
  • Casement window specifications
  • Heritage timber sash windows
  • Vacuum glazed sash windows
  • Triple glazed sash windows

Frequently asked questions

Do you supply section drawings at specification stage?

Yes. Scaled section drawings are supplied in DWG and PDF for every profile, including glazing bar, cill, box and meeting rail details.

Can you provide U-values and acoustic figures?

Yes. We supply calculated whole-window U-values and acoustic data for each glazing build-up, so figures can be quoted directly in the specification.

Do you produce Listed Building Consent packages?

Yes. LBC drawing packages with elevations, sections and glazing details are supplied as standard on heritage and conservation-area projects.

Which standards are your windows tested to?

Our timber windows are manufactured to current British Standards for weathertightness, security and glazing, with test evidence available on request.

Do you work on supply-only contracts for architects?

Yes. Supply-only contracts are available where installation is handled by the main contractor or your preferred installer.

Request a Free Survey & Quote

Book a free measured survey for architect-specified timber windows. We respond within one working day.

Request a Free Survey & Quote

Areas we serve

  • Sash Windows Kensington
  • Sash Windows Chelsea
  • Sash Windows Notting Hill
  • Sash Windows Islington
  • Sash Windows Hampstead
  • Sash Windows Richmond
  • Sash Windows Hackney
  • Sash Windows Dulwich
  • Sash Windows Marylebone
  • Sash Windows Fulham
  • Sash Windows Wandsworth
  • Sash Windows Chiswick
  • Sash Windows Wimbledon