Modification levels
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Five different treatment levels result in different properties, which makes it possible to use modified wood for all kind of applications.

The higher treatment levels are denoted with the letter D (durability), which particularly describe improved durability and the durability class reached according to standard EN 350-1. These treatment levels are recommended for applications requiring good durability typically in exterior use. The milder treatment levels are denoted with letter T (treatment). These modification treatment levels are intended to improve primarily other properties besides the durability. They are suitable specially for interior applications where certain color shade is important and both low water absorption speed and reduced moisture deformation is required.



Modification kilns

Luxhammar delivers complete thermal modification units. 
Thermal modification is ecological method to protect wood against Bacidiomycetes. The treatment is based on natural method that makes wood protect itself.


Thermal modification

Thermal modification changes the properties of wood permanently. It improves resistance to decay and to weather, reduces moisture deformations and increases dimensional stability.



Luxhammar Modification Process

Luxhammar Thermal Modification process takes place in a air tight stainless steel kiln chamber, where lathed timber is treated with high temperature up to 250°C (482°F).



Thermally modified wood

The excellent resistance to decay and good dimensional stability, characteristic of Thermally Modified Wood makes it the ideal environmental friendly alternative in outdoor applications.



Properties of Thermally modified wood

Due to the high temperatures the chemical structure of the wood components are greatly changed. Thermall Modified lumber has altered biological and physical properties. 



Resistance to Decay

Thermal modification improves the resistance to decay which results from changes in the woods internal structure. The durability of thermally modified wood is uniform throughout the whole piece of wood.   



Treatment Levels

Five different treatment levels result in different properties, which makes it possible to use modified wood for all kind of applications.



Dimensional Stability

Deformations caused by condition changes are reduced by 30-90 % in thermally modified wood compared with untreated wood.




In thermal modification timber acquires a darker attractive shade of color, which is uniform throughout the boards. Desired shade of colour is obtained by choosing the right treatment level.



Sizes of Wood Modification Kilns

Luxhammar supplies varios of standard size kilns as well as custom made size.