Our Timber Sash Windows
Our timber sash windows are suitable for both period homes and new builds, with online customisation and clear pricing.
We make our timber sash windows to order and deliver across London, the South, South East, and Midlands. All windows are double glazed as standard. You can upgrade to vacuum glazing or specify single glazing for conservation projects. Choose between hidden spiral balance or traditional cords and weights, with a choice of engineered timber and high-quality ironmongery.
Why choose timber sash windows from us? Precision-built, priced right, and ready when you need them
Ordering wooden sash windows online doesn’t need to be slow or complicated. Our made-to-measure service gives you access to professionally manufactured wooden sash windows with the speed and clarity you’d expect from a modern supplier. Each order is custom-built using durable timber and precision hardware – so you get the long-term performance you need without compromising on style or reliability.
Order online at your own pace or speak to us for help – our team is here to support you from start to finish.
Designed to Be Simple – with Expert Help When You Need It
Ordering bespoke timber sash windows online might feel daunting, but we’ve built our platform to guide you through every step – with real people behind the scenes if you need help. Whether you’re managing a listed building renovation or just replacing a bedroom window, you can design online with confidence, knowing your order is fully checked before production begins.
Not All Timber Sash Windows Are the Same
It’s easy to assume all timber sash windows are built alike – but we’ve seen firsthand how specification, timber grade, and glazing options can vary widely. We only use engineered timbers that meet strict durability standards, and every order is fully factory-finished, glazed, and weather-sealed before dispatch. You won’t find shortcuts here — just sash windows made for long-term use, not quick wins.
Key Features of Our Timber Sash Windows
Every Sash Window Shop product is designed to combine traditional detail with modern performance, delivering genuine long-term value for your home.
- Choice of Mechanism – Hidden spiral balance or traditional cords & weights systems to suit any property type.
- Centre-pane U-values from 0.4 W/m²K with vacuum glazing
- Slim, authentic sightlines suitable for conservation work
- Designed and tested to meet current Building Regulations - Part L Compliant for high energy efficiency
- Option to upgrade to PAS 24:2022 tested for enhanced security
- Factory-Finished Excellence – Teknos 4-coat microporous paint system applied under controlled conditions for maximum longevity and colour consistency.
- Rattle-Proof – Our wooden sash windows are tightly sealed with Q-Lon weatherproof seals, ensuring your home remains comfortable, quiet, and draft-free while effectively blocking out unwanted noise.
- Discreet Ventilation – Optional hidden trickle vents integrated within the frame head to meet Building Regulations without affecting appearance.
- Heritage Detailing – Multiple mould profiles, glazing bar layouts, and horn designs to replicate original joinery across Georgian, Victorian, and Edwardian styles.
- Advanced Glazing Beads – Internally glazed for security, with precision-cut beads and seals for a refined internal finish (externally glazed options available).
- Secure – Featuring a range of security options, including "Secured by Design" accredited features, with an upgrade option to laminated glass for enhanced safety.
- Bespoke – Made to measure for a perfect fit tailored to your specific needs.
Each wooden sash window delivers the character of traditional timber windows with the assurance of tested modern standards.
What We Offer
We manufacture two main timber sash window types, each built to your exact specifications. Both are available in multiple glazing formats and timber options.
You can choose a modern hidden spiral balance system, where the mechanism is concealed inside the frame, or opt for a traditional cords and weights design. Both options are available with double glazing as standard. If your project involves a listed property or a conservation area, we also offer vacuum glazing or single glazing to meet stricter planning requirements.
All our timber sash windows are manufactured in Europe using engineered timber for strength and dimensional stability. Standard lead time is around 8 weeks, or 10–12 weeks for vacuum glazing.
Glazing Options for Every Project
Double Glazing (Standard)
Our standard unit offers excellent thermal performance, with centre-pane U-values from 1.2 W/m²K. It’s suitable for most residential projects and comes with a laminated option if additional safety or security is needed. An energy test certificate is available on request.
Vacuum Glazing (Upgrade)
This ultra-slim glazing option delivers centre-pane U-values as low as 0.4 W/m²K while closely matching the appearance of single glazing. It’s ideal for listed buildings and conservation areas where visual authenticity and insulation are both priorities. Lead time for vacuum units is typically 10–12 weeks.
Single Glazing
For projects requiring a traditional appearance, we also offer 4mm single glazing. This is suitable for properties in strict conservation areas and can be supplied with a putty-glazed or bead-glazed finish, depending on your specification.
Glass Types Available Across All Formats:
Where supported by the glazing type, you can choose from the following glass options:
Laminated Glass – For safety and improved security
Acoustic Glass – Helps reduce external noise, ideal for urban locations
Reeded Glass – For a decorative finish with partial obscurity
Satin Obscure Glass – Provides full privacy with a frosted appearance, often used for bathrooms
We’ll guide you through these choices during the design process, or you can contact us if you need help specifying glass for your property or planning conditions.
Ironmongery Finishes
We offer a range of ironmongery finishes, included as part of your order. You’ll be able to choose your preferred finish when configuring your window online.
Available finishes include:
Polished Chrome (default)
Satin Chrome
Polished Brass
Matt Black
Antique Brass
Satin Brass
Oil Rubbed Bronze
Locks, lifts, restrictors, and sash pulls are all colour-matched.
Choose the Right Opening System
We offer two sash window types depending on your project’s needs.
Hidden Spiral Balance Timber Sash Windows
The spiral mechanism is built into the frame, allowing for a clean look and simpler installation. This option is ideal for modern refurbishments or projects requiring PAS 24 security compliance.
Cords and Weights Timber Sash Windows
This traditional mechanism uses sash weights and pulleys, making it ideal for heritage and conservation settings. The visible frame proportions and movement replicate the original style of period properties.
Engineered Timber Built to Last
All sash windows are made from multi-layer engineered timber, which improves strength and minimises movement over time. You can choose from the following species:
Redwood Pine
Meranti
Sapele
Oak
Accoya (recommended for long-term performance)
Accoya is a modified timber that offers excellent durability and stability. If longevity and minimal maintenance are priorities, we recommend this as the best choice. Read more about Accoya timber here.
Quality Timber Sash Window Furniture
Sash Horn Options
View our wooden sliding sash windows up close
Tested for Performance and Approved for Planning
Hidden spiral balance windows meet PAS 24 security standards.
Our standard double glazed units are energy tested, with U-value reports available.
Vacuum and single glazing options are suitable for conservation areas and heritage projects. We also supply supporting specification documents for planning applications.
If you’re unsure what type of glazing or sash style you need, we’re happy to advise.
How to Order Online
Ordering through our online shop is simple. You can customise your timber sash windows step by step and get clear pricing as you go.
Ordering steps:
Select your preferred opening system
Enter your frame sizes
Choose your design
Choose wood, sash design, moulds, sash horns, paint, glazing, and ironmongery
Add to basket and checkout securely
Technical Drawings and Product Data
We provide technical drawings, section details, and performance data for all our windows. These are available on our Information page. If you’re an architect or builder, you can download CAD files and certification documents there.
Timber Sash Windows in Real Homes
FAQ's
Yes — every order is made to measure. You can adjust frame size, glazing, paint, hardware and more using our online designer.
Absolutely. Our platform is built to support both – from a single window to large-scale supply.
Not at all. Our step-by-step tool makes the process simple, and you can contact us at any stage if you need help.
Yes — we offer traditional detailing, slim glazing options, and support for planning applications where needed.
Standard lead times are 7–8 weeks depending on your specification (e.g. toughed glass, laminated), if CAD drawings are required. Vacuum glazing will add 4 additional weeks.
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