Thermowood Timber

WE USE THERMOWOOD IN OUR PRODUCTS BECAUSE OF IT’S LONG LIFE AND DURABILITY – A SUPERIOR TIMBER COMPARED TO PINE OR CEDAR. 

Not all Sauna and hot tubs are created equal!

Our Thermowood is derived from Nordic Spruce that has been heat treated for over two days, at around 210 degrees Celcius. There a no chemicals used in this modification, simply heat vapour and steam. Looking at the growth rings of the timber, the bands are very narrow and numerous – suggesting very slow growth of around 20-25 years and a dense timber.  Our Nordic Spruce is sourced from Northern European forests grown with sustainable practices.

Heat and Steam thermal modification.

This process removes moisture and resin, leaving a material that has a higher rot, moisture and mould resistance. The timber now has a much longer life and dimensional stability, making it perfect for applications that need resistance to warping.

Great outdoors.

Thermally modified timber is also much less prone to swelling when exposed to water, so perfect for use outdoors.

Thermowood is perfect for sauna and hot tub construction.

The modified timber has reduced thermal conductivity of 20-25%, when compared with other non treated coniferous wood, such as pine or cedar. As it is great for keeping in heat, thermowood is perfect for use in outdoor saunas and hot tubs. Other sauna barrels elsewhere use 38mm thick pine or cedar, we use 45mm Thermowood. In other words, Thermowood keeps the heat in better than cedar and we use thicker timber than other barrels in New Zealand.

Built to last.

Thermally modified wood is a class two timber, durable for 15-25 years See chart. Heart timber has a light caramel tanned appearance and is used in the main walls. Our long wall panels are 45mm thick and have a ball and socket joint, which creates a natural circle shape. Sap or outer timber Thermowood is lighter in appearance and this is used in the door and feet.

Beware similar barrels that use simple tongue and groove lengths, that can break or pop out over time, or products that suggest European heritage, but are made in China (not renowned for sauna).

Invest in the finest European timber and European made sauna.