About Our Heat-Treated Lumber - Fire & Ice
Made of Hemlock
Our saunas and cold plunge tub exterior are made of hemlock, chosen for its natural ability to insulate, resist moisture, and withstand the elements. In hot environments, hemlock remains cooler to the touch and retains heat more effectively than cedar. All the hemlock we use is sourced from responsibly managed forests in Canada that adhere to strict environmental and social standards.
Heat-Treated for Exceptional Durability
Our hemlock undergoes a specialized thermal modification process to increase durability. This three-phase process begins with kiln-drying the wood, followed by heating it to temperatures above 400°F (204°C), finished by slowly cooling through a controlled steaming process. This procedure changes the wood on a cellular level, compressing its internal channels to create a denser structure. The result is a stronger material that is better protected against damage from environmental factors such as weather and insects. The natural moisture resistance of hemlock is also enhanced, preventing swelling and warping over time.
All Natural, Built to Last
Our thermal modification process relies solely on heat and water—no chemicals involved. This technique increases the lifespan of your wood naturally, without the use of any additives.