Thermowood is produced by heat treating selected Scandinavian Redwood (Pinus sylvestris). The Scandinavian Redwood is conditioned in a unique continuous kilning process, heating the timber to 212° Celsius whilst protecting it with steam. This thermal process enhances the chemical and physical properties of the timber providing many benefits. In external applications (BS EN 335 Use Class 3) Thermowood meets the requirements of Durability Class 2 (BS EN 350).
After thermal modification the timber becomes naturally durable making it suitable for use as cladding, decking or other outdoor applications, without the need for toxic chemical preservative treatment. Thermal modification can also be applied to other timber species.
Our Thermowood is recognised by the Building Research Establishment (BRE) which endorses a 30 year service life when used for cladding and decking.
Our Thermowood is also certified with the European Standard CE mark ensuring it meets EU consumer safety, health and environmental requirements.
In addition to natural durability, thermal modification provides other benefits.
The timber darkens to an attractive deep brown making it ideal for timber cladding and decking. The colour change is consistent throughout the thickness enabling further cutting, drilling or shaping, without the need for additional preservative treatment and without affecting the durability or service life.
The changes to the physical properties give Thermowood greater stability over untreated or chemically treated timber. This means that Thermowood suffers less shrinkage, swelling, cupping and distortion than ordinary wood.
This environmentally friendly product is PEFC certified; ensuring timber is sourced from well managed sustainable forests.