• Gripsure Thermowood Ash Non-Slip Decking
  • Gripsure Anti-Slip Thermowood Ash Deck Board
  • Gripsure Anti-Slip Thermowood Ash Deck Board
  • Boardwalk using Gripsure Thermowood Non-Slip Decking at Residential development, Kennet Island

Thermowood Ash Non-Slip Decking

Thermowood is a thermal modification procedure that changes the properties of the timber to make it resistant to rot and decay without the use of chemicals.

The Ash boards are placed inside a kiln and the Thermowood method involves a carefully controlled computer-based heat and steam process reaching temperatures in excess of 200 degrees. The Thermowood process gives the boards excellent stability, providing minimal movement, and produce a darker colour that naturally weathers to a light grey over time.

15-Year Gripsue Performance Warranty

Features & benefits

  • Overall average PTV rating: 85
  • Exceptional stability
  • Secret fixing system
  • Low maintenance
  • Weathers to an attractive silvery grey
  • Expected service life of 25+ years
  • Industry-leading 15-year non-slip Performance warranty


Board dimensions: 22mm x 142mm
Available lengths: bespoke lengths available on request
Profile finish: smooth with two aggregate non-slip inserts