What is a Insulated Garage Door?
A garage door with insulation material (polyurethane or polystyrene) sandwiched between steel panels for thermal efficiency.
An insulated garage door has insulation material sandwiched between two steel skins (or between a steel exterior and a vinyl/steel interior finish). The two main types of insulation used are: polystyrene — rigid foam panels inserted into the door sections (typically R-6 to R-9), and polyurethane — foam injected directly into the door sections, which bonds to the steel skins and provides both superior insulation (R-12 to R-18+) and structural rigidity. Polyurethane-insulated doors are significantly quieter, stronger, and more energy-efficient than polystyrene-insulated or non-insulated doors. In Canada, insulated garage doors are strongly recommended for: attached garages (to prevent heat loss from the home), heated garages (workshops, man-caves), and any garage in extreme climate zones (Prairies, Northern Ontario, Québec). An insulated door can reduce garage temperature fluctuations by 10–20°C compared to a non-insulated door.