Timber Sash Windows London
At Ayrton Bespoke, we design and manufacture bespoke timber sash windows for period, heritage, conservation, and contemporary homes. As the capital’s leading timber windows company, we combine the best of traditional joinery with modern engineering to deliver sash windows that stand in a league of their own, offering superior energy efficiency, security, and decades of smooth day-to-day operation.
From Georgian townhouses to architect-designed conservation or contemporary homes, London trusts Ayrton for high-end timber sash windows designed and crafted entirely around your needs and preferences.
Timber Sash Windows for All London Homes
Sash windows have long been a defining feature of British architecture, and while we’ve seen changes to the style over the centuries, they remain one of the most architecturally significant features of London homes to this day. As timber sash window specialists, we produce authentic options for every London home.
Weight-Assisted Sash Windows
By far the most popular style in period homes, weight-assisted sash windows operate using counterbalanced weights concealed within the frame. We produce period-accurate replicas that preserve their distinctive handfeel, as well as the details—glazing bars, curves, and horns—that bring a sense of personality and character.
Spring-Balanced Sash Windows
Spring-balanced sash windows use a discreet, modern mechanism that does away with bulky weights and pulleys, allowing for slimmer and sleeker designs. More popular in contemporary homes, they typically offer larger apertures than their weight-assisted counterparts for improved ventilation and sightlines—all at a reduced cost.
Sash Windows for Heritage Homes
Replacing sash windows in period, heritage, or conservation area homes is not always straightforward, and projects may get bogged down navigating planning permissions and building regulations. We specialise in helping heritage homeowners replace their sash windows with true replicas that preserve the property’s charm, proportions, and detailing, while also working with local authorities to ensure a seamless project.
Sash Windows for Mid-Century and Contemporary Homes
In mid-century and modern properties, sash windows are often more refined with slimmer frames, larger glazed areas, two-tone finishing, and simplified detailing. Our bespoke designs ensure maximum light flow, uncompromised performance, and year after year of smooth operation.
Handcrafted timber sash windows represent a significant financial investment, reflecting their level of craftsmanship, material quality, and bespoke design involved. Unlike off-the-shelf solutions, each window is individually designed, manufactured, and installed to suit the specific architectural, regulatory, and personal requirements of your property.
Aesthetics
Timber has a certain visual appeal—natural warmth and depth of character—that alternative materials struggle to replicate. With beautiful natural grain and a true sense of timelessness, timber remains the first choice for discerning homeowners, especially in period and high-quality contemporary homes.
Thermal & Acoustic Performance
Timber is a natural insulator, outperforming many alternative materials in reducing heat loss and external noise. When combined with high-quality glazing and precision-engineered draught-proofing, Ayrton timber sash windows may achieve a U-value as low as 1.2 W/m²K, reducing energy costs and increasing comfort.
Security & Durability
Featuring dual sash bolts, dual precision-engineered fasteners, and internally beaded glazing that prevents external access, our sash windows meet or exceed recognised security standards from day one. Paired with high-quality ironmongery from trusted names such as From the Anvil and SDS London, premium paint from the UK’s leading brands, and industry-leading quality guarantees, Ayrton clients enjoy complete peace of mind with zero visual compromise.
Smooth, Reliable Operation
Whether opting for traditional weight-assisted mechanisms or modern spring-balanced solutions, careful calibration and rigorous in-house testing promise decades of perfectly smooth operation, even with heavy use and minimal maintenance.
Our expert sales team is here to assist with your project. Need an initial estimate? Looking for guidance on your next steps? Want to see our products firsthand? We’re ready to help and show you around our friendly showrooms.
We prefer to conduct a site visit whenever possible to provide thorough and professional advice, covering all London postcodes and beyond. During a visit, our sales team will discuss the scope of work with you and explain Ayrton’s approach, including details about the materials we use, our fitting methods, our factory and business operations. The more questions you have for us the better! We take initial measurements to prepare a precise quotation for you.
If you haven’t already visited one of our showrooms, we encourage you to do so while you consider your quote. Our showrooms are useful spaces to explore our product range and get a feel for what you are investing in. Alternatively, our sales team can share locations of local Ayrton installations for you to inspect, or you can speak directly with one of our clients to hear firsthand about their Ayrton experience.
Following a deposit paid, our work starts with a detailed survey of your property to ensure we design with precision and your windows (or doors) are built to fit their apertures. Once design is agreed, production begins at our factory and our Operations team with an estimated fitting date.
Making your brand-new window or door is only part of the job. Ensuring that the product is fitted precisely and securely is important. All our fitters are Ayrton employees, and it’s their job to make sure that they get that perfect fit with minimum fuss.
Sash windows are traditional vertical sliding windows that have been used in UK architecture since the mid to late 1600s, peaking in popularity during the Georgian era. Traditional box sash windows use a system of pulleys and weights for smooth operation, while modern spiral sash windows use a spring counter-balance system for the same reason.
In contrast, casement windows are hinged and operated using a swinging motion.
We design and craft both box sash and spiral sash windows, depending on your needs. We typically design traditional box (cord-and-weight) sash windows for period or conservation properties, while spiral sash windows are a more popular option for new builds or tighter spaces, for example, bathrooms or dormers. There is a price difference between these styles.
Learn more about the Different Types of Sash Windows
Timber sash windows offer an elegance and authenticity that even the best uPVC alternatives can’t replicate. Bespoke timber windows are painstakingly crafted from natural wood at the hands of skilled artisans—exactly to your specifications—making the eyes of your home something more personal and valuable.
From a less emotional and more practical point of view, high-quality timber windows are sustainable, maintainable and guaranteed to last for decades. Modern material science advancements means we can now make timber windows that are as resistant to rot, warping, and degradation as virtually any alternatives, while still retaining their naturally attractive look.
100% of the timber we use across all our ranges is sourced from sustainably managed and FSC-certified forests. Additionally, we employ strict environmental practices in manufacturing and removals, ensuring minimal waste and efficient use of resources.
Ultra-durable and energy-efficient, we aim to craft bespoke timber windows and doors with an absolutely minimal environmental footprint over their expected lifespan of 60+ years.
While the general condition of the windows will naturally affect your home’s value, well-crafted timber sash windows that operate smoothly, provide excellent energy efficiency, and complement your home’s character are highly sought after among buyers. Whether designed as focal points on new builds or as exact replicas for period homes, investing in bespoke, high-performance sash windows can make your property more attractive, and could help you fetch a higher price on the open market.
We specialise in crafting exact replicas of sash windows for period and protected homes in conservation areas across London. Our team specialises in perfectly duplicating traditional box sash windows, crafting high-performance replacements using original craftsmanship and woodworking techniques. With decades of experience working on protected properties, our team understands how to navigate planning permissions and building regulations, significantly streamlining a process that could otherwise cause delays and/or hidden costs.
Learn more about Building Regulations for Window Replacements
Learn more about Planning Permissions for Windows in London
Yes, they do. In fact, one of the biggest advantages of sash windows is their ability to be opened to any level—the sashes will stay in place, even if there is a strong breeze. Opening both the top and bottom sash creates excellent airflow, allowing warmer air to escape while drawing in cooler air through the bottom opening.
Double-glazed timber sash windows offer excellent insulation and are a good option for those who value energy efficiency. Our double-glazed sash windows have a U-value of 1.2 W/m²K as standard, with the option of upgrading to vacuum glazing with a U-value of 0.7 W/m²K.
with one of the friendly
Ayrton team?
Our team will be happy to answer any questions you might have. Alternatively, why not pop into one of our showrooms to see our products in person, grab a coffee and talk through how to get the best for your home with one of our friendly design team.
