Timber casement windows remain one of the most versatile and enduring window styles for UK homes. They suit everything from period properties and cottages through to contemporary new builds, offering a balance of traditional appearance and modern performance. Our Allwood timber casement windows are selected for homeowners who value natural materials, careful craftsmanship, and long term reliability.
At LB Window Systems, we specify timber casement windows when a project calls for warmth, character, and design flexibility. Timber allows for precise detailing, varied proportions, and finishes that simply are not achievable with alternative materials, while still meeting modern expectations for insulation, weather protection, and durability.
- Engineered timber construction for strength, stabilithy and longevity
- Beautifully crafted fine joinery
- High performance double glazing with argon gas and warm edge spacer bars
- Multi point sealing and weather protection for comfort and reduced noise
Allwood timber casement windows are manufactured using carefully engineered timber sections, designed to balance natural movement and resist warping over time. Multi layer timber construction helps maintain structural integrity, while Deventer weather seals provide consistent heat retention and acoustic performance. The 58mm sash and 90mm frame depth allow for a robust build without compromising on refined proportions.
As standard, the windows are fitted with high quality double glazed units using thermofloat glass, with a 4x20x4mm configuration and argon filled cavity. This achieves a glass U value of 1.1 W/m²K, helping to reduce heat loss and improve overall energy efficiency. Warm edge spacer bars further support thermal performance while reducing the risk of internal condensation.
Protection and finish are equally important with timber. Allwood casement windows are factory finished using environmentally responsible, micro porous coatings that allow the timber to breathe while protecting it from moisture and weathering. These finishes help extend maintenance cycles and preserve the natural appearance of the wood. A range of timber options is available, including hardwoods and pine, allowing the windows to be matched carefully to the style and age of the property.
At LB Window Systems, we guide you through every stage of choosing timber casement windows, from design and proportions through to glazing and finish. We take time to assess your property, explain the practical considerations, and ensure the windows are specified correctly before manufacture. Our focus is on delivering timber windows that look right, perform properly, and continue to do so for many years once installed. Allwood timber casement windows are some of the best in the UK market. Contact us for a free quotation.
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