Wooden Windows

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We design and install wooden windows that combine timeless character with the performance today’s homes demand. Whether you own a listed property in London, are working on a project for a Victorian terrace in Bristol, or are beginning a contemporary new build in Surrey, our windows are made to complement any home’s style.

Our role is to support your project with stunning products that also meet heritage standards, improve thermal efficiency, and deliver long-term value. As established suppliers, we partner with industry professionals to ensure every order is delivered to specification, on time, and backed by long-term guarantees.

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Our range of wooden window types

We manufacture and install a full range of timber window styles to suit period properties, listed buildings, and modern developments.

Sash windows

Our wooden sash windows combine the appearance of traditional joinery with modern draught-proofing and glazing options. Whether you are specifying a replacement for a conservation project or a complete set for a new building, our designs are engineered to meet planning requirements without compromising efficiency.

Sash windows

Bay windows

A wooden bay window is often central to Victorian and Edwardian properties. We replicate original profiles with precision while integrating double glazing and modern locking systems. Each unit is made to order, ensuring a seamless fit and straightforward installation for contractors.

Casement windows

Wood casement windows remain one of the most versatile solutions for both Heritage and contemporary projects. Available in flush or stormproof designs, our casements offer durability, flexibility of opening, and slim sightlines. Every frame is built to exact dimensions, streamlining the installation process for developers and fitters.

Casement windows

Double-glazed windows

Our wooden windows are easily delivered double-glazed, marrying the character of timber with the insulation required to meet today’s performance standards. Options are available to suit conservation restrictions while helping your projects achieve excellent energy performance.

Timber materials and expert craftsmanship

We use only FSC-certified, responsibly sourced woods that are carefully selected to complement the architectural character of each project. By pairing high-quality materials with precision joinery, we create windows that look authentic, perform reliably, and last for decades.

Our Cornish craftspeople combine traditional skills with modern machining technology to ensure every frame meets exact specifications. Choose from a range of timber:

Redwood: A versatile softwood valued for its thermal properties and engineered stability. Redwood reduces the risk of warping or twisting, making it an excellent choice for painted wooden sash or casement windows where fine detailing and long-term performance are essential.
Red Grandis: A plantation-grown hardwood with a uniform grain, Red Grandis balances durability with design flexibility. It accepts both paint and stain finishes, offering a resilient option for wooden bay and casement windows that must withstand exposure while maintaining a refined appearance.
Abodo: Developed through thermal modification, Abodo provides strength, stability, and a low carbon footprint. As an eco-conscious timber, it is a well-suited choice for replacement windows in projects where sustainability targets are a priority.
Accoya®: One of the most advanced modified timbers available, Accoya offers exceptional resistance to rot, outstanding stability, and impressive energy performance. It is a future-proof choice for double-glazed wooden windows, providing a low-maintenance, high-durability solution for both Heritage and contemporary builds.

Our sustainability practices

Sustainability underpins everything we do. All windows are manufactured from responsibly sourced timber, with waste fully recycled. In addition, we plant five trees per month for every customer order, helping trade partners meet the increasing demand for environmentally responsible solutions.

For developers and architects, this commitment supports planning approvals, BREEAM targets, and client expectations for sustainable construction.

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Bespoke for your project

No two projects are alike, and our service reflects that. From consultation through to delivery, we tailor each window design to property requirements and architectural specifications.

Whether you are sourcing replacement windows for a listed townhouse or commissioning a full set for a new development, our bespoke process ensures accuracy, durability, and a finish that meets both design intent and building standards.

Upfront wooden window costs

The cost of wooden windows depends on size, glazing specification, heritage detailing, and project scale. While timber requires a greater initial investment than uPVC, it offers a longer service life, reduced replacement cycles, and compliance benefits, making it ideal for you or your clients.

We provide clear, upfront quotations on all windows; simply contact our team with your needs.

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Our technical information

Every Nine Zero window is supported by a full set of technical resources, including CAD drawings, detailed specifications, and glazing configurations. These give architects, developers, and installers the precision required to integrate our products seamlessly into project designs.

From listed building restorations to modern developments, our technical information provides the clarity you need on profiles, performance ratings, and hardware options. And when a project calls for something outside standard specifications, our team is available to advise on bespoke details, compliance requirements, and installation considerations.

Datasheets and technical drawings

Security and performance

While maintaining authentic profiles, our windows integrate modern performance standards, backed up by our Secure by Design accreditation. Every design can be specified with secure locking systems and double or triple glazing.

Guarantees

We back every product with industry-leading guarantees designed to support both trade professionals and homeowners alike.

Up to 30 years’ warranty on timber for structural integrity and resistance to decay.
10 years on glazing units, ensuring lasting clarity and insulation performance.
10 years on workmanship and paint finishes, protecting against premature failure and reducing maintenance cycles.

Warranties

Partner with Nine Zero today

We partner with you to deliver the stunning bespoke windows you need for your project. Our expertise ensures your designs are realised with precision, sustainability, and long-term reliability.

If you are looking for a trusted supplier of bespoke timber windows, contact Nine Zero today to discuss your project requirements.

FAQs

Can Nine Zero supply wooden windows for listed buildings?

Yes. We regularly design and supply listed wooden windows that meet conservation requirements while delivering improved performance.

Do you work with developers on large-scale projects?

We can support both single-property refurbishments and multi-unit developments, supplying consistent quality across every order.

Are double-glazed wooden windows suitable for Heritage projects?

Yes. We offer conservation-approved glazing solutions that combine authenticity with energy efficiency.

Why choose Nine Zero as your wooden window supplier?

Because we deliver proven craftsmanship, sustainability, and guarantees, combined with reliable supply and support for trade professionals.

Request a brochure

To explore our range of sustainable timber windows and doors and imagine the possibilities for your project, request a Nine Zero brochure by contacting our team today.