Timber Sash Windows
Experience the elegance and timeless appeal of timber sash windows, expertly crafted to combine classic design with modern functionality. Whether you're restoring a period property or adding character to a contemporary home, our sash windows are a perfect choice.
What Are Timber Sash Windows?
- Sliding Sash Windows
- Hung Sash Windows
- Box Sash Windows
Key Benefits of Timber Sash Windows
The large glazed surface area maximizes natural light, brightening any room.
Crafted exclusively from hardwood, ensuring long-lasting strength.
Unlike casement windows, sash windows cannot be blown open or shut.
Both vertical panels open easily, promoting effective air circulation.
Top-Tier Box Sash Windows Built for Quality and Longevity
At International Windows Group LTD, we exclusively offer top-tier box sash windows renowned for their exceptional quality throughout London. Our products are a perfect mix of great materials and modern technologies, complemented by years of invaluable experience that has earned the trust of numerous clients. We assure clients of long-lasting longevity for their windows by spraying four layers of waterproof paint on our products.
Additionally, our windows are compatible with conservation area by using Victorian style design.
Technical Specifications
& Colour Options
WOOD
STRUCTURE
Windows are sled up and down.
Drive supported with lead weight or springs placed in window frame.
PAINT
GLAZING
OPENING
FEATURES
HANDLES
SEALS
SILICONE
GEORGIAN BARS
SPACEBAR
ADDITIVES
ACCESSORIES & OPTIONS
Timber Sash Windows Crafted for London Homes
At International Windows Group, we design and manufacture high-quality timber sash windows that respect traditional British architecture while meeting modern performance standards. Our sash windows are a popular choice across London, particularly for period properties, conservation areas and homeowners seeking timeless aesthetics combined with contemporary comfort.
Each window is produced in our workshop using carefully selected timber and proven joinery techniques. Whether you are upgrading an existing property or working on a full renovation, our portfolio of completed projects demonstrates the level of detail and craftsmanship we bring to every installation.
Traditional Box Sash Windows with Modern Performance
Our box sash windows follow the classic vertical sliding design, operating on either traditional weights or modern spring balances. This construction ensures smooth operation, excellent ventilation and long-term reliability.
Unlike many mass-produced alternatives, our timber sash windows are finished with a four-layer waterproof paint system, significantly improving resistance to weather and extending the lifespan of the timber. When properly maintained, wooden sash windows can last for decades, making them a sustainable long-term investment.
Designed for Period Properties and Conservation Areas
Timber sash windows remain the preferred solution for listed buildings and conservation areas across London. Our designs are compatible with Victorian and Georgian styles, including features such as horns, Georgian bars and traditional proportions.
For homeowners seeking improved thermal performance, we offer double glazed timber sash windows and optional acoustic glazing. These solutions improve energy efficiency while maintaining the original appearance required by local planning authorities. More technical details can be found in our technical drawings.
Materials, Glazing and Finishing Options
We manufacture timber sash windows using a range of high-quality materials, including pine, meranti, oak and engineered laminated timber. All glazing units are carefully selected to balance thermal insulation, security and sound reduction.
Our sash windows can be finished in any RAL colour, with options for dual-colour joinery, decorative glass and premium ironmongery. Full specifications and certifications are available in our certificates section.
Complete Service – From Consultation to Installation
We provide a complete service, starting with consultation and technical advice, followed by manufacturing and professional installation. Our experienced fitting teams ensure precise installation and a clean finish, helping your new sash windows perform as intended.
If you are comparing different window types, you may also wish to explore our timber casement windows or UPVC sash window options.
Request a Quote for Timber Sash Windows
If you are considering timber sash windows for your home in London, our team will be happy to advise you on the most suitable solution. You can view examples of our work in the portfolio or contact us directly via our contact page to request a quotation or arrange a consultation.