Made to measure sash windows: Crafted for character and performance
If you own a Victorian, Edwardian or Georgian property, off-the-shelf windows rarely fit. Made to measure sash windows give you...
Read MoreLast Updated: 9 June 2026
Our bespoke timber frames achieve the perfect combination of performance and attractive appearance. We have created this blog to provide information on why you should choose premium Accoya windows Cheshire homeowners love for their properties.
Accoya wood is a treated softwood that is manufactured using an acetylation wood modification process that enhances the natural properties of the material. Unlike traditional timber, Accoya requires very minimal maintenance to keep it looking great. The acetylation process changes the cell structure of the wood which prevents insects and fungi recognising the material and therefore they cannot ingest the material.
Untreated wood is already a naturally insulating material which is why it has been so commonly used as a building product. Accoya wood has further advanced this thermal efficiency. Showcasing exceptional thermal retention and reflection properties, allowing our Accoya windows to reduce your energy bills whilst keeping your home comfortable all year round. All our windows are fitted with double glazing as standard to further enhance your homes energy efficiency and noise reduction.
he acetylation process, unique to Accoya, not only resists decay but also strengthens the wood against harsh weather conditions. Recent improvements in this process have further extended the lifespan of Accoya windows, now exceeding 60 years with minimal maintenance. This longevity makes it a cost-effective choice over time.
Accoya is developed using a fast-growing pine that is sustainably sourced in New Zealand from an FSC-certified forest. This pine has a significantly lower carbon footprint than many of the popular alternatives. The acetylation process does increase the lifespan of the timber, but it doesn’t affect the recyclability of it, after use Accoya can even be composted.
Read more: Is timber the most sustainable option for home improvements?
Our Accoya windows are available in a huge range of shapes, sizes, and styles, ensuring we have something to suit every property. Customise your windows by choosing from a range of long-lasting finishes. Accoya’s unique cell structure means you’re easily able to re-stain or varnish your window in the future.
Recent technological developments have enhanced Accoya’s resistance to UV rays, preventing discolouration and maintaining the wood’s natural beauty for longer. Additionally, innovations in joinery and finishing techniques have expanded the range of bespoke designs available, making Accoya wood suitable for even the most unique window shapes and sizes.
Our sash window style is a perfect traditional replica that we recommend to homeowners who are looking to enhance the heritage look of their existing property. Accoya windows have already been approved by many local building regulators for use in strict conservation areas.
If you’re interested in having Accoya windows installed or you have another home improvement project in mind, please get in touch with our expert team by either calling us on 01619697474 or you can contact us online.
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