How much do new wooden sash windows cost?
Reddish Joinery has been producing high-quality window joinery since 1967, so we understand the importance of retaining the period and...
Read MoreLast Updated: 29 April 2025
With energy bills continuing to soar, we’re all looking for ways we can conserve energy around our homes. When homeowners think of thermally efficient and cost-effective windows their first thoughts are typically uPVC. However, timber is an excellent natural insulator, trapping heat within your home whilst keeping the cold at bay. At Reddish Joinery, we offer Accoya timber windows that offer unmatched thermal performance to save you energy and money every month.

One of the main reasons we started to manufacture home improvement products using wood was because of its naturally insulating performance. The reason timber is so energy efficient is due to the air pockets that naturally occur within its structure. Accoya wood is a fast-growing pine that has been through an acetylation process to enhance all of the natural properties of traditional timber.
Find out more about all about our Accoya wood products.
By upgrading to Accoya windows you’ll see a noticeable difference in the temperature retention within your home. When the outside temperatures drop, you’ll find your heating bills start to decrease as you’ll need to use less energy to heat your home.
All of our windows are fitted with our ultimate double glazing as standard. Our ultimate double glazing features an argon gas between the panes, to achieve exceptional levels of thermal efficiency. Double glazing also reduces the noise pollution from outdoors, making your home calm and comfortable.
Accoya wood windows are known for their long-lasting beauty and efficiency. When installed they’re able to last for over 50 years. Contrary to popular belief timber windows are very simple to maintain, all you need to do is give them a good clean at least twice a year and re-treat them every 10+ years. Your installer will be able to thoroughly discuss your maintenance plan with you during our aftercare process.
For more information check-out our windows maintenance page

Timber is an entirely renewable material, the pine used to manufacture our Accoya windows is only sourced from responsible forests in New Zealand. Acetylation is a non-toxic process that doesn’t affect the recyclability of the wood so it can be fully recycled at the end of its lifespan. Across its life, Accoya works out to be completely carbon negative so you can rest assured you’re making an active effort to make your home more sustainable.
If you’re interested in upgrading your windows to heritage timber windows or you’d simply like more information about our range of Accoya products, don’t hesitate to get in touch with a member of our team. You can contact us by either calling us on 01619697474 or contact us online for your free, no-obligation quote.
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