Thermo-Ash and Thermo-Pine is available in thickness 21 – 25 mm, widths 110 – 130 mm, lengths 1000 – 3000 mm. There’s a wide range of different profiles both on visible and invisible screwing. Oil impregnation is optional, If left untreated will naturally become superficially gray where inside remains unchanged. High durability class: Thermo-Ash first class (20 – 25 years), Thermo-Pine (15 – 20 years). It’s a perfect environmentally friendly alternative for exotic species and chemically impregnated wood.