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The most innovative timber species for your home improvement range

Accoya windows and doors from Dempsey Dyer are made with the most advanced modified timber out there and we’re proud to offer it for our range of timber products. Offering unrivalled durability, this beautiful modified timber could be the right choice for your projects. Your timber collection could benefit from our variety of products offered in Accoya. All our casement window styles including Flush Sash can be manufactured in Accoya as well as Sliding Sash. We also offer Accoya timber doors including entrance, patio and Bifolds as well as conservatories and orangeries.

For the latest timber innovation, choose Dempsey Dyer’s Accoya range for your timber supply. Our dedication to providing our customers with the latest developments ensures you’re always ahead of the rest.

What makes Accoya different?

Accoya is a modified timber created by the acetylation process. This patented technology allows the timber to be weather resistant, resilient to rot and remain strong for years to come. The process removes the wood's ability to absorb water, preventing it from shrinking, swelling and decay.

This is a natural process which doesn’t add anything to the wood that isn’t already naturally occurring. This also means that no toxins are released into the environment. Accoya timber is always obtained from sustainable sources and is recyclable so is perfect for environmentally conscious customers.

Accoya timber conservatory
Accoya window supply

Unbeatable performance

The impressive performance of Accoya matches or exceeds that of tropical hardwoods and it’s rigorously tested for quality. Naturally insulating and with a high strength to weight ratio, it makes the optimum window, door or conservatory frame.

Guaranteed for 50 years above ground and 25 in the ground or freshwater, it’s a timber that won’t let you down. Exceptionally strong and weather resistant, you won’t find a better timber species that ticks all the boxes.

Natural beauty with remarkable performance

The strength and durability of Accoya makes it ideal for coating and colour lasts two times longer than other timbers. This makes it perfect for homeowners who want to customise their new windows, doors or conservatories. The acetylation process doesn’t affect the natural aesthetic value of the timber; it will always give a perfect finish for every home.

Timber is a desirable material for many homeowner’s due to its natural beauty and traditional appearance. Period and country homes especially suit timber but Accoya products can complement any home.

accoya doors supply


Installers and other businesses can only work effectively if they have a reliable trade supply service – offering the highest performing products. Luckily, here at Dempsey Dyer we only supply the latest options from market leaders. This guarantees quality, performance and durability – regardless of the product choice.


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