ThermoSpruce (Picea Abies)

ThermoSpruce Grading and Classification

AB-Graded ThermoSpruce

AB-graded ThermoSpruce, sourced from the sustainable forests of Finland, is a premium thermally modified wood known for its exceptional durability and stability. The AB grade guarantees a high-quality surface with minimal knots, ideal for applications such as exterior cladding, decking, and interior paneling where a refined finish is essential. ThermoSpruce undergoes a specialized heat treatment process that enhances its resistance to decay and improves its dimensional stability, all while preserving the natural beauty of Finnish spruce. Produced with an eco-friendly, chemical-free method, ThermoSpruce is a top choice for those seeking sustainable and long-lasting building materials from Finland’s responsibly managed forests.

ThermoSpruce Classification

ThermoWood is classified based on the level of heat treatment applied, which directly impacts its properties such as durability, stability, and color. The two primary classifications are Thermo-S (Stability) and Thermo-D (Durability). Thermo-S is treated at lower temperatures, focusing on improved dimensional stability and is ideal for indoor applications like furniture and paneling. Thermo-D, treated at higher temperatures, offers enhanced durability and resistance to decay, making it suitable for outdoor use, such as decking and cladding. We provide all ThermoSpruce products as D and S classes.

ThermoSpruce Products Available from Stock

Standard lenghts available (mm)

2100

2400

2700

3000

3300

3600

3900

4200

4500

4800

5100

5400

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

ThermoPine (Pinus Sylvestris)

AB-Grade