ThermoAsh (Fraxinus Excelsior)
ThermoAsh Grading
A-Graded ThermoAsh
A-graded ThermoAsh is a top-tier, thermally modified hardwood that stands out for its durability, stability, and rich appearance. Through a chemical-free heat treatment process at high temperatures (around 200°C), the wood becomes highly resistant to decay, moisture, and insect damage, making it ideal for outdoor applications like cladding, decking, and furniture. The “A-grade” designation means that the wood is of the highest quality, featuring minimal knots or imperfections, giving it a smooth, refined finish that’s perfect for premium projects.
ThermoAsh Products Available from Stock
Standard lenghts available (mm)
1500
1800
2400
2700
2900
3000
HJT-Holz and ThermoWood®
Browse our certifications
Our AB-graded coniferious products is sourced from ecologically managed Finnish forests and meets the highest environmental and quality standards. Explore our certifications, including FSC and PEFC, to see our commitment to sustainability and product excellence.
Other Sawn ThermoWood® Products
Offices
Head Office
Manufacturing is entirely made in Mänttä-Vilppula.
Lahnajoentie 196
35700 Mänttä-Vilppula
Finland
