Durable, flexible, and environmentally friendly wood sourced, modified, and distributed in the USA.

KLAASWOOD uses an innovative, 2nd generation hydrolysis technology that is changing the landscape of thermally modified wood.

KLAASWOOD wood is the only modified wood that is both sourced and modified in North America. This makes KLAASWOOD an obvious choice when you look to reduce logistic costs and risks while minimizing the ecological footprint. Locally grown and modified wood by North American workers guarantees you a readily available premium product.

KLAASWOOD offers superior durability without the use of chemicals. The treatment process reduces the wood’s ability to absorb or release moisture, resulting in improved stability and reduced warping, shrinking, or swelling, and is also more resistant to decay, rot, and fungal growth. The wood meets the requirements of Durability Class One performance and comes with a certified 20 year warranty.

We take pride in being cost-competitive without sacrificing excellence. KLAASWOOD utililzes widely available wood sources to provide strong and durable wood that surpasses the qualities of premium wood sorts, and our 2nd Generation thermal modification process uses less energy and increased efficiency to lower the cost and make the product more affordable.  

The thermal modification process is carried out without the use of chemicals, making it a sustainable alternative compared to some other wood treatments using biocides. It is also fully recyclable and has an optimized CO2 footprint compared to other products.

Through an extensive review of existing research, our analysis has revealed a robust correlation between Equilibrium Moisture Content (EMC) and Durability Performance, a standard measure in our industry and practical for quality assessment during manufacturing. Lower EMC levels in modified wood are linked to superior durability performance. 

Based on rigorous laboratory testing involving 900 specimens from five different species, we conducted data analysis and presented our findings at the 11th European Workshop on Thermally Modified Timber in the spring of 2023. Our study demonstrates with high statistical significance that an EMC level at or below 6 results in the highest durability performance, reaching Durability Class 1.

We are proud to confirm that all KLAASWOOD products meet the EMC standard of being at or below EMC = 6, as assessed using our established sampling and preparation procedure.

KLAASWOOD is taking wood to the next level in the construction of our modern society. The use of thermally modified wood not only enhances the sustainability and longevity of your architectural projects, but also adds a touch of timeless beauty to the built environment.