A step up from our standard pine. Radiata pine thermally modified to our "Thermally Modified Timber" specification — a higher-grade process that yields tighter grain, a richer brown tone, and even greater dimensional stability. The premium choice for architects who want the look of hardwood at softwood pricing. Same profile range as our pine cladding, same 3/4" × 5-1/2" dimension — the upgrade is in the species and treatment grade. Profile options TG-Triple — triple-reveal tongue and groove TG-I — square-edge minimal shadow TG-V — V-groove reveal Specifications Species: Radiata Pine (Pinus radiata) Treatment: Thermally Modified Timber (premium grade) Dimensions: 3/4" × 5-1/2" (19 mm × 140 mm) Coverage: 4 1/2"-5 1/4" face per board Finish: Unoiled Fixing: Hidden nail through tongue