Usage examples (6)

• Including organic matter (fibers, charcoal) with the clay makes terra cotta a better insulant.
• - Terra cotta is a much better insulant than metal, so less heat is lost from a terra cotta stove.
• But tinted windows not only saves on your interior but acts as an insulant on the glass, which obviously helps when you're running the air conditioner.
• It performs both as an insulant and as a thermal-mass and it locks up carbon as it grows.