Insulating your garage door is a simple procedure that has the potential to save you money in many ways. Whether you retrofit insulation as a DIY project, hire a pro to do the job, or buy an already-insulated door, it will conserve energy and safeguard your possessions. Why Should You Insulate? Garage door insulation protects against all sorts of severe weather – heat waves, cold spells, heavy rain, and snowstorms. And not only your garage is sheltered, but the adjoining room of your house, as well. As a result, you’ll need less air conditioning or heating, according to the season, which will reduce your utility bills. It’s not just the garage that suffers due to temperature fluctuations.