Heritage Timber Windows

Designed to reflect the original style and proportions of period homes, our Heritage timber sash windows bring authenticity to listed buildings and homes in conservation areas while meeting modern regulatory standards.

Whether you’re restoring a Georgian manor or upgrading a Victorian terrace, our collection blends timeless aesthetics with outstanding energy efficiency, security, and sustainability.

With roots in traditional craftsmanship and a focus on modern performance, we work with professionals and homeowners on stunning new timber windows.

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Heritage window styles we offer

Technical spring sash 138

Perfect for period homes that require a more discreet solution, our Heritage Spring Sash Windows conceal the spring mechanism within a slim-profile frame. This allows for a flush, clean finish while delivering smooth operation, energy efficiency, and modern security.

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Technical box sash 138

For listed buildings and properties in conservation areas, our Heritage Box Sash Windows use traditional cords and weights, housed within a deeper frame. This adheres to the original construction methods, so it’s ideal for sensitive restoration projects.

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Both options are made from sustainable FSC-certified timber and are available in a wide range of finishes to suit your home.

Bespoke

Crafted for individuality, each Nine Zero timber sash window reflects bespoke heritage charm tailored for contemporary performance.

Secure

Enhanced timber sash window security means Document Q and PAS 24 compliant, multi-point locks, and internally beaded glazing.

Sustainable

We use FSC-certified sustainable materials, recycle timber waste, and supply renewable energy to local communities as just a small part of our plan.

Quality

Using Engineered Redwood, Engineered Red Grandis and Abodo sustainable timber wherever possible, our products are made from the highest standard renewable wood.

Insulated

A wooden sash window is a natural insulator with little thermal conductivity, offering U-values as low as 1.0 W/m²K and reduced energy bills.

Easy clean

Timber sash windows feature low-maintenance design, simple frames and durable finishes for effortless cleaning and minimal maintenance.

Weatherproof

Resilient and built to last in all climates, Nine Zero timber windows meet BS 6375:2015 Parts 1 and 2 regulations for weathertightness.

Our windows’ features and benefits

Sustainability and extensive expertise are behind every Nine Zero action, ensuring the materials we select and the designs we craft are central to delivering unparalleled durability in our products.

Key features include:

Lambs’ tongue and putty-style mouldings for authentic heritage detailing
Decorative sash horns that mirror the original period design
Angel locks for enhanced child safety and peace of mind
Slim frames to maximise natural light and maintain visual balance
Traditional ironmongery options to suit your property’s original style
Double or single glazing to meet both performance and conservation requirements
Improved security and acoustic insulation without compromising historical charm

All designs are tailored to reflect the distinctive character of Georgian, Victorian, or Edwardian architecture, ensuring a seamless visual appearance, whether replacing a single broken window or updating every window to meet modern thermal and security standards.

Customisation and craftsmanship

All of our Heritage windows are also made to measure, precisely crafted to suit the unique dimensions, style, and history of your property. From traditional glazing bars and decorative horns to your choice of hardware and paint colours, every detail is tailored to you or your client’s vision.

We use only FSC-certified timber, which supports sustainable forestry and helps reduce environmental impact. Our windows are built by expert joiners in Cornwall, combining time-honoured techniques with cutting-edge tooling for flawless results.

Technical

Sustainability and extensive expertise are behind every Nine Zero action, ensuring the materials we select and the designs we craft are central to delivering unparalleled durability in our products.

Our dedication to excellence drives us to explore, test, and ultimately choose only the most exceptional quality timber materials, coupled with the industry’s most effective production techniques.

You’ll see our precision throughout our collection of detailed CAD drawings below, showcasing the meticulously designed profiles and features of each timber window and door product. Should you require further information or professional advice on your project, the knowledgeable Nine Zero team is ready to assist you.

Technical

Glass, hardware and colours

Nine Zero timber windows and doors come to life with our wide range of glazing options, designed to meet your specific requirements. Choose from slimline glazing ideal for historical restorations, and advanced acoustic glass to soften city living and create a tranquil home.

Style to suit with our extensive hardware selection, including sleek lifts, secure locks, durable fasteners and smooth pulleys in various finishes – all supported by our reliable 5-year warranty.

Mix or match with any colour scheme by choosing any RAL or heritage F&B shade, all guaranteed with a 10-year assurance on our expertly-painted finishes.

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Our guarantees

Sustainability and extensive expertise are behind every Nine Zero action, ensuring the materials we select and the designs we craft are central to delivering unparalleled durability in our products.

Our heritage windows come with an industry-leading 30-year warranty on timber, along with a 10-year guarantee covering workmanship, glazing, and paint finishes. These long-term assurances reflect the care and precision behind every product we craft.

For more information, please see our Warranty page.

Warranty

Partner with us on heritage properties

Whether you’re a homeowner completing a period property restoration or a professional seeking a reliable, high-quality supply of Heritage windows, Nine Zero is the team you need.

Our trade supply partners get special rates, marketing support and direct access to our expert team.

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FAQs

Do you offer Heritage casement windows?

We offer bespoke casement windows in a Heritage style to suit your needs. Just speak to our team and let them know what you would like for your project.

How long does it take to make and install Heritage windows?

Lead times vary by project, but we’ll guide you through the timeline from survey to installation. We aim for a 6-8 week turnaround on our products.

Can I customise the finish and hardware?

Yes. Everything from paint colour to ironmongery is fully customisable to match a property’s character.

Where does Nine Zero work?

We work with homeowners, architects, and developers across, Greater London, Surrey, Hampshire (particularly Winchester), Bristol, and the wider South West area (particularly Gloucestershire and Somerset).

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.