Timber Sash Windows
Wooden Sash Windows - Double-Glazed Windows
Timber sash windows which are double-glazed are a popular choice for homeowners who want to improve the energy efficiency of their homes. Double-glazing works by trapping a layer of air between two panes of glass, which helps to insulate the home and keep heat in during the winter and cool air in during the summer.
LBS is a London-based company that has been manufacturing sash windows for over 40 years. We offer a wide range of double-glazed sash windows to suit every home. Our windows are made from the finest timber and are fitted to the highest standards.
We are a family-run business, and we are passionate about providing our customers with the best possible service. We are always listening to our customers’ feedback, and we are constantly innovating to improve our products and services. Find out more below
Want an idea of cost? Click here for an instant estimate!
Timber Sash Windows
Thermal insulating while warmedge Swisspacer bar. Helps detract from the fact it’s double-glazed.
Traditional horn details to match period design.
Drained and vented rebates allow any trapped moisture to escape through small concealed holes, prolonging the life of the double-glazed units.
High-performance ball bearing pulley wheels and sashes hung with pre-stretched nylon sash cord which can take 500kg of weight.
21mm slimline ovolo glazing bar detail.
Additional security through limit stops installed to allow for secure ventallation.
Premium lockable fitch fastners.
Premium sash lifts.
Accoya Wood
Known for its exceptional durability and stability. Resistant to rot, decay, and insects, Accoya wood is also a sustainable choice with low environmental impact. Made from non-toxic, sustainably sourced materials and with a very long lifespan, Accoya wood is the perfect choice for windows and doors
Glass & Glazing
At London Box Sash Windows, we take pride in crafting only the finest double-glazed units. Made in house, ensuring the highest level of quality and performance in every unit we produce
Finish
Sash windows, finished with the latest low-maintenance paint systems and state-of-the-art drying technology for a flawless, long-lasting finish.
Extreme Stability
70% to 80% reduction in swelling & shrinkage
Low Maintenance
Paint finish that lasts 3-4 times longer
Robust Construction
Mortice & tenon joints used
Sympathetic
Traditional features sympathetically replicated
High Performance
A-rated double-glazed units
Naturally Insulating
Improved thermal insulation
One Wood Sash Window - One Tree Planted
We are passionate about sustainability and protecting the environment. We believe that everyone has a role to play in creating a healthier planet, and we are committed to doing our part.
That’s why we only use FSC timber for our timber sash windows. Not only is this more sustainable, but it also means that our windows are of the highest quality. We also support One Tree Planted, a charity that plants trees around the world. For every sash window we sell, we plant a tree.
We believe that by working together, we can make a difference. If you are looking for a sustainable and stylish way to improve your home, then consider our timber sash windows. You can be sure that you are making a positive impact on the environment.
Get a quote
Drop us a line to discuss your windows
When looking into window options, there are several reasons why you might choose Timber Sash windows.
Here are some key advantages:
Energy Efficiency:
Timber Sash windows can be manufactured with modern materials and techniques that enhance their energy efficiency. Double glazing, weatherstripping, and insulated frames are available options, which can help reduce heat loss, improve insulation, and contribute to lower energy bills.
Noise Reduction:
Living in a bustling city like London often means dealing with external noise. Timber Sash windows, especially when combined with double glazing, can provide effective noise reduction, creating a quieter and more peaceful living space.
Smooth Operation:
High-quality London Box Sash windows are designed to operate smoothly and effortlessly. They typically incorporate counterbalanced mechanisms or spring systems, allowing for easy opening and closing without the need for excessive force or maintenance.T
