Proud members of the International ThermoWood Association & National Hardwood Lumber Association
“Perfect installation every time!”
Save up to 50% on your installation time
Exclusive Manufacturing Rights
ThermalWood Canada holds the exclusive rights outside of France to produce GRAD® clips — a state-of-the-art system that simplifies hardwood decking and cladding installation.
Engineered for Strength and Precision
Each clip is made from POM (polyoxymethylene), one of the highest-performing plastics on the market. It’s the same advanced material used to manufacture ski boot soles, chosen for its strength, durability, and resistance to wear and weather.
Faster Installation, Flawless Results
With the GRAD® system, you can save up to 50% on installation time. The clips provide a completely invisible fastening solution, meaning no drilling through wood and no splinters. Built-in spacing ensures consistent gaps and a perfect finish — every single time.
Compatible with Every Ironbark Profile
All of our IronBark profiles are fully compatible with the GRAD® hidden fastener system, allowing for quick, clean, and professional installation across any project.
If you prefer traditional installation, we recommend using stainless steel screws to prevent corrosion and maintain the long-term beauty and performance of your decking or cladding.
If you have questions that we haven’t answered. We’d love to hear from you.