Product Specification Showrooms
For Architects & Designers

ThermoWood® is produced by heat treating Finnish grown pine and spruce to temperatures in excess of 200 degrees centigrade. During the heat treatment, chemical and structural changes occur within the timber which alter and improve some of its basic characteristics. The resulting product is an altogether more durable and stable timber, an ideal cladding material for use in exposed areas such as external walls.


Thermowood is rated as class 2, which is durable.  (BRE give a life span for this product of around 30 years).

Dimensional Stability

One of the benefits of this product is it's stability, the thermal modification process reduces the moisture content in the board ensuring less movement.

Thermal Conductivity

Thermowood has a thermal conductivity of around 20% less than standard softwoods.  The thermal conductivity is y10 to 0.099 W/(m K).


The density of this material is between 350kg m3 to 480kg m3 when dried to a moisture content of around 6%.


Nail/screw holding capability on this product is around 20% less than usual due to the altered state of the cell wall caused by the thermowood process.

Teknos Coatings

Teknos coatings are designed to keep your cladding looking its best year after year.  They carefully select the best and most appropriate products from their extensive group portfolio to ensure their coatings offer optimum performance for the UK market.
Teknos’ high quality products have been developed to help timber withstand the harshest climates and protect it from UV-light, rain, humidity and extreme temperatures.  For more information on Teknos products, please click here.

Sansin Coatings from Dresser Mouldings

Dresser Mouldings is proud to offer a premier wood finish from Sansin – a company that also believe in making products that are designed to perform and impress.  For more than 30 years, Sansin has pioneered the use of water-borne, environmentally-friendly wood protection finishes and treatments to optimize performance and durability, as well as enhance the natural beauty of wood.  Offered in a range of stunning colours, Sansin finishes give you the beauty and protection you’ve been looking for.  For further information about Sansin factory finishes for your project, please contact us.

Product information