Try Our Interactive Window Configurator
Design and price your bespoke sash windows online in minutes.
About Skylon
Welcome to Skylon Timber & Glazing, where craftsmanship meets functionality. We specialize in creating high-quality timber windows that enhance both the aesthetic appeal and energy efficiency of your home.
Serving London and surrounding areas, we bring over a decade of expertise in bespoke timber window manufacturing and installation. As members of The Joinery Network and FENSA registered installers, we offer free site surveys within 25 miles of London, with nationwide delivery available for all our products. Our windows are engineered for exceptional airtightness and energy efficiency, significantly reducing heat loss and lowering energy bills without compromising the traditional appearance of your property.
Traditional Sash Windows
Our expertise lies in creating authentic Georgian, Victorian, and Edwardian sash windows that perfectly match London's period architecture. Each window is meticulously crafted to preserve historical aesthetics while incorporating modern performance standards.
Whether your property is in a Conservation Area or is a Listed Building, we understand the planning requirements and deliver windows that meet both heritage and building regulation standards.
Why Choose Skylon
- Premium Timber - Hardwood, Accoya & Oak - Painted windows are exclusively made from hardwood. Upon request, we can produce from Accoya or oak. We manufacture using engineered timber, which prevents warping over time. Guaranteed durability and weather resistance, perfect for London's climate. Our timber is sourced from sustainable forests.
- Premium Spray Finishing System - Timber is immersed in preprimer, then primed twice with primer, and finally topped with a finish coat. We use only products from the finest manufacturers: Sikkens Wood Coatings and Teknos.
- Modern Performance, Hidden Aesthetics - Slimline double glazing and draught-proofing that maintain the historic look while reducing noise and heat loss. All our windows and doors are PAS24 certified for enhanced security and FENSA registered for Building Regulations compliance.
- Conservation Area Expertise - We design windows compliant with conservation requirements and Listed Buildings regulations, ensuring your property meets all planning standards.
- In-House Workshop & FENSA Installation - Every window is handcrafted in our workshop near London and installed by our FENSA-certified installers, guaranteeing quality from production to completion.
- Comprehensive Warranty & After-Sales Support - Peace of mind with our insurance-backed warranty and dedicated customer service team.
- Part of Skylon Group - As part of the Skylon Group, we can provide bespoke solutions for your entire window surroundings, including comprehensive construction services tailored to your project needs.
Handcrafted Excellence
Every Skylon window is handcrafted in our workshop near London by skilled artisans who understand the intricacies of traditional joinery. We use time-honoured techniques combined with modern precision to create windows that will last for generations.
We use the premium Lignum timber system, ensuring PAS24 security certification on every installation. From sliding sash to casement windows, our products combine traditional aesthetics with superior thermal performance and acoustic insulation, keeping your home warm in winter and cool in summer.
Achieve Outstanding U-Values with Passive Glass
One of the biggest challenges architects and specifiers face on period property projects is meeting increasingly stringent energy performance targets while maintaining authentic aesthetics. Our timber sash windows can be fitted with Passive Glass — an advanced glazing solution that delivers exceptionally low U-values, making it possible to meet and exceed current Building Regulations and even Passivhaus standards.
Traditional double glazing typically achieves a U-value of around 1.4 W/m²K. With Passive Glass, our windows can reach U-values as low as 0.7–0.8 W/m²K — a dramatic improvement that can transform the overall energy performance of a building. For architects struggling to meet SAP calculations or Part L compliance on heritage projects, this is a game-changer.
Passive Glass uses advanced low-emissivity coatings and gas-filled cavities to minimise heat transfer while allowing maximum light transmission. The result is a window that looks identical to a traditional timber sash but performs at a level comparable to modern triple-glazed systems. This means no compromise between conservation requirements and energy targets.
Whether you are working on a Conservation Area renovation, a Listed Building project, or a high-specification new build that demands traditional aesthetics, our Passive Glass option provides the thermal performance you need. Contact us to discuss how Passive Glass can help your project achieve its energy targets.
Trusted Certifications & Partners