How to Install Garage Door Insulation?

Mary J. Arnett
4 min readJun 9, 2023

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Installing garage door insulation can be a relatively simple process. Here are general instructions to help you with the installation:

  • Gather Materials: Get an insulator or the material you will be using. This may include insulation, duct tape, a utility knife, a tape measure, and a straight edge.
  • Door Preparation: Clean the inside surface of the garage door to make sure it’s free of dust and debris. If necessary, remove any existing waterproofing or adhesive material from the door.
  • Measure and cut insulation: Measure the size of each of your garage door panels. Using a ruler and utility knife, cut the insulation panels to fit the measurements of each doorway. Be precise to ensure a good fit.
  • Fixing the insulation panels: Stick the tape along the edges of the insulation. Place the panels on the inside surface of the garage door to ensure they are aligned correctly. Press firmly to secure them in place. Repeat this process for each doorway.
  • Seal joints: Use duct tape to seal gaps or joints between insulation panels. This will provide better insulation and prevent air leaks.
  • Optional: Install a reflector (if included in your insulator): Some insulation kits may include a reflector. If possible, cut the reflective material to the size of each door panel and attach it to the insulation using tape or the method recommended by the manufacturer.
  • Check the operation of the door: After installing the insulation, open and close the garage door a few times to make sure it is working properly and without any obstructions or interference from the insulation panels .

What type of insulation is best for garage doors?

The best type of garage door insulation depends on many factors, including your specific needs and budget. Here are some common types of insulation used for garage doors:

  • Polystyrene Sheet: Polystyrene sheet, also known as expanded polystyrene (EPS), is a popular and economical choice for garage door insulation. These panels are lightweight, easy to install and offer good insulation value. They usually come in pre-cut sheets that fit standard garage door sizes.
  • Polyurethane Foam: Polyurethane foam insulation provides excellent thermal performance and excellent insulation properties. It provides a higher R value (a measure of resistance to heat) than polystyrene. Polyurethane foam insulation is usually sprayed onto garage door panels, expanding and sticking to the surface. This type of insulation can provide better energy efficiency and can help reduce transmitted noise.
  • Reflective Insulation Foil: Reflective foil, also known as radiation barrier insulation, is designed to reflect radiant heat. It consists of a layer of aluminum foil sandwiched between other materials, such as foam or bubble wrap. Reflective foil is effective in hot climates where radiant heat suppression is a priority. This can help keep the garage cooler by reflecting the sun’s heat away from the door.
  • Fiberglass insulation: Fiberglass insulation is a common type of insulation used in buildings, including garage doors. It is composed of small fibers of glass and is available in mat or roll form. Fiberglass insulation provides insulation and can help reduce noise. However, it may be less effective at insulating against air leaks than other options.

How thick should the garage door insulation be?

The thickness of the garage door insulation can vary depending on the specific insulation and the R-value. The R-value measures the insulation’s ability to withstand heat, indicating it resists heat flow. how good. A higher R value indicates better insulation performance.

The recommended thickness of garage door insulation will depend on factors such as climate, desired energy efficiency, and personal preference. However, here are some general guidelines:

  • Styrofoam sheet: Foam board is usually about 1/2 inch to 2 inch thick. Thicker panels generally provide higher insulation value (higher R-value) and better thermal performance.
  • Polyurethane Foam: Polyurethane foam insulation is commonly used as a spray and expands to fill the available space. Thickness can vary, but it is common to have a foam layer of about 1–2 inches. Polyurethane foam insulation generally has a higher R-value than other types of insulation.
  • Fiberglass Insulation: Fiberglass insulation for garage doors typically comes in a standard thickness of 1 1/2 inches or 2 inches. The R value varies depending on the specific product.

How much money can you save?

So how much money can you save by insulating your garage door with a product like the KoolDoor Garage Door Insulator? How much you can save will depend on a number of factors, including:

  • Your garage size
  • The climate where you live
  • The type of insulation you use

The savings can be substantial in Australia, which has a hot climate. Overall, the KoolDoor Garage Door Insulation Kit is a high-quality option for Australian homeowners looking to insulate their garage door. With closed cell foam technology, reflective panels and easy installation, this is a great value for money product. So if you want to save money on energy bills and increase the comfort of your home, this is worth considering.

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Mary J. Arnett
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