Thermowood Claddings

Our Thermowood Claddings collection features premium exterior timber boards that have been thermally modified to enhance durability, stability and resistance to decay. Thermowood is produced by heating softwood in a controlled process that changes the cellular structure of the timber, reducing moisture absorption and improving dimensional stability without chemical treatments — making it ideal for long-lasting external cladding applications.

Thermowood cladding offers a refined, consistent appearance with rich, natural tones that weather gracefully over time. This makes it a popular choice for contemporary façades, garden rooms, garages, workshop exteriors and bespoke timber features where aesthetics and performance matter. It is also less prone to cupping and movement compared with untreated timber when installed correctly.

Supplied by Nottage Timber Merchants, our Thermowood cladding is selected for exterior use and can be finished or left to weather naturally, depending on your design preferences. As a local timber merchant in South Wales, Thermowood cladding boards are available for Click & Collect from our yard in Pyle or local delivery across SA, CF and NP postcodes using our own vehicles. If you’re unsure which board size or finish you need, our team is happy to help with advice before you order.