With Old Man Winter knocking at our door, experts at Therma-Tru remind homeowners to check their doors to make certain they are not leaking air, which can increase heating costs. Derek Fielding, director of product management for ThermaTru Doors recommends seeking out fibreglass entry doors that are thermally broken, meaning they insulate against both cold and heat. Steel doors can be thermally conductive and result in the transfer of temperatures quickly from the interior to the exterior, and vice versa. Read more…