Thermo Ash with GRAD Concealed Fixing

Premium thermally modified European ash with a seamless, modern installation system.

🌳 Sourced from sustainably managed European forests
🏗 Durability class: I – comparable to tropical hardwood
🔩 GRAD concealed fixing system – no visible screws
📐 Dimensionally stable, crack-resistant and low maintenance
🌧 Naturally resistant to rot, fungi and moisture
🌱 Chemical-free thermal modification
🎨 Develops an even silver-grey patina outdoors
☀ UV-protective finish optional to retain original colour

Combine top-level quality and refined design with thermally modified ash, installed using the innovative GRAD concealed mounting system. This premium façade timber is thermally treated without chemicals, resulting in an environmentally responsible and low-maintenance wood species with durability class I.

The GRAD system ensures fully hidden installation, creating a clean and contemporary façade without visible screws or clips. It also enables faster installation and a perfectly aligned finish, making it ideal for architectural projects where aesthetics and simplicity are essential.

When left untreated, the wood gradually develops a beautiful and uniform grey tone. To preserve the original warm colour, a UV-protective surface treatment can be applied.

What is Thermo Ash?

Thermo Ash is European ash that undergoes a chemical-free thermal modification process. By heating the wood to approximately 215°C using steam, the cell structure is permanently enhanced. This significantly improves durability and dimensional stability, delivering performance comparable to tropical hardwood while maintaining a substantially lower environmental footprint. It is the ideal choice for projects that combine aesthetics, performance and ecological responsibility.