Winter-Proofing Your Garage Door

September 14th, 2010

Last week we covered tactics to protect your garage for the rain and wind of Autumn; today we’ll cover insulating your garage against the cold weather that Winter will be bringing along in the next few months.

Insulated garage doors not only keep the garage relatively warm, they also save you money on heating costs and help maintain the temperature of the rest of the house. This is especially true in houses with an internal door connecting to the garage, where a cold temperature in the garage will quickly start sapping heat from the rest of the house.
Cheaper steel and aluminium doors rarely have insulating layers like more expensive versions, which typically have a layer of polystyrene or polyurethane either behind the door or between two layers of steel or aluminium. Wood and fibreglass, by contrast, have a degree of natural insulation, though this is rarely as good as more expensive polyurethane-insulated steel doors.

The amount of insulation offered by a garage door is represented by an R-value; the higher the R-value, the higher the thermal efficiency of the door. Moderate climates require an R-value of around 4 or 5, while more extreme temperatures could warrant an R-value of around 6 to 7. The highest R-value available is 10, which we hear is Santa’s personal favourite.

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