What Makes Accoya Special?

Accoya wood is not just any timber. It undergoes a unique modification process called acetylation, which transforms sustainably sourced softwood into one of the most durable and dimensionally stable materials on the market. This process ensures that Accoya resists the common issues faced by traditional timber windows, such as warping, swelling, and decay.

Here’s why Accoya sash windows are gaining popularity:

Unparalleled Durability

Accoya’s acetylation process gives the wood exceptional durability. Classified as a “Class 1” timber, Accoya is rated for the highest level of decay resistance, making it ideal for exterior applications like sash windows, which are exposed to the elements year-round. In fact, Accoya comes with a 50-year anti-rot guarantee, ensuring your sash windows remain in top condition for decades with minimal maintenance.

This makes Accoya sash windows particularly suited for homes in areas prone to damp or changing weather conditions, as the timber won’t warp, swell, or shrink due to moisture fluctuations. The result is a sash window that operates smoothly and looks as good as new, year after year.

Energy Efficiency

Modern sash windows made from Accoya timber are designed with energy efficiency in mind. Accoya has natural thermal insulation properties, which means it helps to regulate the temperature within your home, keeping it warm in the winter and cool in the summer. When paired with double or triple glazing, Accoya sash windows can significantly improve your home’s energy efficiency, reducing your reliance on heating and cooling systems.

For period properties or conservation areas where single glazing may be required, Accoya’s thermal properties still offer advantages, helping to limit heat loss compared to traditional untreated wood.

Aesthetic Flexibility

One of the most appealing aspects of Accoya sash windows is their versatility in design. Whether you’re looking to maintain the authenticity of Georgian, Edwardian, or Victorian sash windows, or create a modern twist on a classic style, Accoya can be customised to suit your needs. The timber can be easily shaped and finished, ensuring slim profiles, detailed mouldings, and other decorative features remain intact.

Moreover, Accoya takes paint exceptionally well, meaning you can finish your windows in any colour, from classic whites to bold modern shades. The paint finish lasts much longer on Accoya than on other types of wood, thanks to the wood’s stability, which reduces the risk of cracking or peeling paint over time.

Sustainability

Accoya is not only durable but also one of the most sustainable timber choices available. The wood used to produce Accoya is sourced from fast-growing, FSC®-certified forests, ensuring that your sash windows are both eco-friendly and responsibly produced. The acetylation process that Accoya undergoes is non-toxic and environmentally friendly, making it a great choice for homeowners looking to reduce their environmental footprint without sacrificing quality or performance.

In addition, the longevity of Accoya sash windows means fewer replacements over time, further reducing the environmental impact of manufacturing and installing new windows.

Maintenance and Longevity

Traditional timber sash windows often require regular upkeep to prevent rot, warping, or paint peeling, but with Accoya, maintenance is significantly reduced. Thanks to its inherent stability, Accoya sash windows resist the moisture-related issues that plague other timber windows. As a result, the need for repainting, re-sealing, or costly repairs is minimised, making Accoya sash windows a more cost-effective long-term investment.

Even in harsh climates, Accoya maintains its shape and performance, ensuring that your sash windows continue to open and close effortlessly. With proper care, Accoya sash windows can last well over 60 years, offering unmatched value for homeowners seeking longevity without compromising on aesthetic appeal.

Tailored for Conservation and Period Properties

Accoya sash windows are ideal for properties in conservation areas or listed buildings where maintaining the architectural integrity of the original windows is essential. Accoya allows for the precise replication of traditional sash window designs while meeting modern energy efficiency and durability standards.

Whether you’re restoring Georgian, Edwardian, or Victorian properties, Accoya can be used to create bespoke sash windows that comply with planning requirements, ensuring that your property’s historical charm is preserved while benefiting from modern performance.

Customisation Options

Accoya sash windows are available in a wide range of customisation options to suit any style or specification:

• Glazing: You can choose between double, triple, or even single glazing depending on your requirements. For period properties, heritage-style glazing options are available to maintain the traditional look while still improving thermal performance.
• Colours and Finishes: Accoya timber can be pre-finished in any RAL colour, allowing you to match your windows to the existing design scheme of your home. The stability of the wood ensures that paint or stain finishes last significantly longer than on untreated timber.
• Hardware: You can select from a range of hardware options, including traditional brass or modern stainless steel fittings, to complement your window design. High-security locking mechanisms are also available to ensure your windows are both beautiful and secure.

The Ideal Investment for Your Home

Investing in Accoya sash windows is more than just a decision about aesthetics—it’s about securing the longevity, performance, and sustainability of your home’s windows. Whether you’re upgrading to enhance energy efficiency or restoring period charm, Accoya sash windows offer the perfect balance between tradition and innovation.