George Barnsdale Windows & Doors
Welcome to the George Barnsdale collection at KJM Group. Since 1884, George Barnsdale has been at the forefront of British craftsmanship, manufacturing state-of-the-art timber windows and doors that perfectly blend traditional architecture with modern engineering. At KJM Group, we are proud to supply and install these premium, hand-crafted timber products for homes across Andover, Hampshire, and the surrounding areas of Southern England. Whether you are updating a modern property or seeking exact replacements for a heritage home in a conservation area, this bespoke timber collection offers uncompromising quality, timeless elegance, and exceptional performance.
The Very Best Specifications
Benefits of Timber Windows and Doors
Choosing George Barnsdale means investing in the natural beauty and structural integrity of responsibly sourced timber. Unlike older wooden frames that were prone to rot and draughts, these modern windows and doors are manufactured using advanced engineering and multi-coat factory-applied finishes. This provides a highly durable, low-maintenance timber solution that resists the elements whilst maintaining its character. Furthermore, George Barnsdale was the first UK manufacturer to produce an A-rated timber window. By combining naturally insulating wood with high-performance double, triple, or ultra-thin vacuum glazing, these products deliver outstanding thermal efficiency, acoustic insulation, and high-level security for your home
Windows, Entrance Doors & Patio Doors
Our Timber Range
The George Barnsdale range offers complete design flexibility, split across Traditional, Historic, and Contemporary collections to suit your exact architectural requirements. Explore our Timber Windows, which include highly authentic sliding sash and flush casement designs ideal for listed buildings, alongside modern tilt-and-turn options. For your home’s exterior, browse our bespoke Timber Entrance Doors and classic stable doors, crafted to create a lasting first impression. If you are looking to open up your living space to the garden, discover our robust Timber Patio Doors, including elegant French doors, sliding systems, and versatile bifold configurations. View the individual product categories below to explore custom hardware, colour matches, and period detailing.
George Barnsdale Brochures
Frequently Asked Questions
Are timber windows suitable for listed buildings and properties in conservation areas?
Yes. George Barnsdale offers a Historic Range designed specifically to meet local authority planning requirements. These windows feature narrow frame profiles, traditional putty-line aesthetics, and period-accurate hardware, allowing for historical accuracy while upgrading thermal performance.
What level of maintenance do modern timber frames actually require?
Unlike older wooden frames, modern engineered timber windows do not require constant sanding and repainting. They are treated with a multi-coat factory finish. However, they are not maintenance-free. To maintain the timber and the warranty, you need to wash the frames annually with warm, soapy water and apply a specialist care lotion to protect the paint or stain finish.
What are the differences between double, triple, and vacuum glazing for timber windows?
Double glazing provides a standard balance of energy efficiency and cost. Triple glazing uses three panes to offer the highest level of thermal and acoustic insulation. Vacuum glazing uses two panes separated by a very thin vacuum gap, delivering high thermal performance while maintaining the exceptionally slim profile often required to preserve heritage sightlines.
Why is engineered timber used instead of traditional solid wood?
Engineered timber is created by layering and bonding sections of wood together. This process removes the natural tension found in solid wood, making the final window or door frame far more structurally stable. It heavily reduces the risk of the timber twisting, warping, or swelling over time, which ensures the moving parts continue to operate smoothly.
Can the frames be colour-matched to existing heritage paint schemes?
Yes. The frames can be finished in standard opaque paints or translucent wood stains, and they can also be exact-matched to any RAL or BS colour chart. Dual-colour options are available if you require a specific historic colour for the exterior and a neutral shade for the interior.
Why Choose KJM?
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As an established, independent home improvement company based in Andover since 1983, KJM Group brings over 40 years of experience to every installation. We are proud to be a multi-award-winning Which? Trusted Trader, recognised for our commitment to high-quality workmanship, transparent pricing, and a strict no-pressure approach to sales.
Fitting premium timber products requires exact precision and respect for a property’s character, particularly when dealing with heritage homes. Our experienced, in-house installation team ensures that your new George Barnsdale windows and doors are fitted flawlessly. From your initial consultation through to our comprehensive aftercare support, we are dedicated to providing a reliable, professional service that guarantees your investment performs beautifully for decades to come.