Bespoke timber box sash windows with double glazing for a Kensington period home.
PAS 24 secure, 1.3 U-value performance with authentic heritage detailing.
Featured Ranges in Our Kensington Installation
This project utilised bespoke timber box sash windows, manufactured to match the original proportions of this Kensington period property. The traditional sliding mechanism, slim glazing bars and heritage mouldings retain the building’s character while delivering modern performance standards.
Each window was factory finished and precision installed to ensure accurate alignment across the front elevation bay.
All units were fitted with 24mm Low-E sealed double glazing, argon filled with warm edge spacer technology. This specification achieves a U-value of 1.3 W/m²K, improving thermal efficiency and reducing heat loss without altering traditional sightlines.
PAS 24 compliant security and concealed trickle ventilation provide modern comfort and compliance within a period framework.
Timber Sash Windows in Kensington
Brunswick Gardens is defined by its strong period architecture, with tall bay elevations, balanced proportions, and detailed internal cornicing typical of Kensington’s historic terraces. Properties of this style rely on correctly scaled sash windows to maintain their original facade rhythm.
Timber sash windows remain the appropriate choice for period homes in Kensington, particularly within conservation settings where traditional materials and sightlines must be respected. The box sash design mirrors the original construction, retaining vertical sliding operation and slim glazing bars while incorporating modern thermal and security performance expected from sash windows in Kensington today.
Project Details & Challenges
The scope of works involved the full replacement of original timber sliding sash windows to the front elevation, including a prominent bay configuration. New bespoke box sash units were installed, fitted with 24mm Low-E double glazed sealed units (4/16/4), argon filled with warm edge spacer technology. Concealed trickle vents were integrated through the head, and all windows were manufactured to meet PAS 24 security standards.
Performance was significantly improved, achieving a U-value of 1.3 W/m²K to reduce heat loss. The sealed double glazing also provides improved acoustic insulation – an important consideration in central London – alongside modern locking systems for enhanced security.
Installation required careful coordination within an interior featuring detailed cornicing and established plasterwork. Particular attention was given to protecting mouldings, maintaining clean junctions and ensuring precise bay alignment. Sightlines were preserved to retain the original proportions of the facade while upgrading overall performance.
Why Kensington Homeowners Choose Sash Windows London
With specialist experience in period properties, we understand conservation sensitivity and facade accuracy. As a FENSA registered company, every installation meets current building regulations and is supported by a GGFI insurance-backed guarantee.
Our timber products are FSC-certified, UK manufactured, and protected by a 30-year timber guarantee, delivered through a fully managed, end-to-end service from survey to aftercare.
Contact Us for Timber Sash Windows in West London
If you require timber sash windows in Kensington or across West London, arrange a free site survey with our team. We manufacture every window to order, with specialist experience in conservation and period properties. Discuss your project and receive a detailed quotation today.