Thermo pine joist A/B 42x42x2100mm

The Thermo pine joists are dimensionally stable, durable and completely environmentally friendly. As these joists are intended for the underconstruction of wooden decking, we supply them in ABC grading. This joist is graded B. The Thermo wood we supply is manufactured using the WTT method, which uses a heat treatment of the wood at 180°C.
No chemicals are used at all in the heat treatment process. Only a little water is needed to start the process. The rest is done by gradually increasing the temperature inside the pressurized chamber (using a pressure of 7 to 9 bar). The gradual heating of the wood releases moisture and creates a steam-filled environment that ensures even colouring and finishing of the wood. This process makes the wood completely environmentally friendly and poses no threat to the surrounding flora and fauna.
The wood is pre-dried to 12-14% moisture content before the actual thermo treatment. An important part of the WTT process is that the wood is never dried to 0% during the treatment. On the contrary, the residual moisture level remains at 6-8%. This moisture content is the final moisture content for Thermo wood.
Modern technology controls the entire production process and an even wood finish throughout the entire cross-section is thus guaranteed. Thanks to this treatment, the pine changes its original natural light yellow shade to a natural slightly dark colour.
The timber gains significantly improved dimensional stability and thus reduces the susceptibility of the wood to deformation or swelling and subsequent shrinkage. Dimensional changes are eliminated by up to 60%.
The wood shows increased resistance to rot and mould, as well as improved insulation properties. The substructure made of timber prisms must be oversized to resist deformation and lifting during swelling and shrinkage during the year.