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8 Steps to Insulate Your Garage Door

8 Steps to Insulate Your Garage Door


Garages are now so much more than a place to put all your tools, it can a place to work out, hang out and work on your car. When it’s used as a multipurpose space you will find that it can get freezing in the winter months.
You can however, insulate your garage doors to retain heat and comfort during the colder months. You can complete the entire job in about four hours for less than $500. Just buy the materials from homewares store and gather up a utility knife, tape measure, straightedge, saw, dust mask, and a hammer and nails. Here’s how to do it.

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You will need:

Step 1: Measure mark and install the retainer pins

Measure to find the spot that’s 30cm from each edge of the panel and midway between the horizontal rails. Mark the location. Then peel off the adhesive backing paper and press the retainer pin base onto the panel. Install two retainer pins in each panel.

Step 2: Cut the batting

Roll out the batting with the vinyl side down and mark the cutting lines. Place the batting on scrap plywood. Then compress the insulated garage door with a straightedge and cut with a utility knife.

Step 3: Lock the batting in place

Start by washing each door panel with household cleaning spray and rags. Then rinse the areas with clean water and let dry. Next, install the retaining pins. Measure the height and width of each panel and add 1 in. to the length and width when you cut the batting to size for a snug fit. Panel sizes may differ along the door, so measure each one as you go rather than pre-cutting all the panels based on one measurement. Fit the cut insulation into the panel with the vinyl side facing into the garage. Then secure it to the retaining pins. Repeat until all the panels are insulated.

Step 4: Mount the doorstop weather stripping

Place the doorstop against the top and side jambs so the vinyl weather stripping is at a 45-degree angle. Temporarily secure it in place with nails pounded in only partway.

Step 5: Readjust to accomodate door movement

Apply pressure to the door to simulate the effect of a strong wind. Then move the doorstop inward to maintain a good seal. The gap may not be the same in every location along the sides, so check it in several spots and readjust accordingly.

Starting at the top of the door, tack the doorstop weather stripping to the top jamb. Mount the side doorstops the same way. Then press against the door to simulate how much it might move in strong winds. Readjust the doorstop so it seals against the door even in windy conditions. Then pound the nails in all the way. If the door has too much play to adjust the doorstop properly, or you can see light through the doorstop weather stripping, replace your existing hinges with spring-loaded versions that press the door against the weather stripping at all times.

Step 6: Install a new bottom seal

Jam a fat-blade screwdriver into the crimped area and twist to gently bend out the aluminum track. Repeat on each end of the track.

Step 7: Slide in the new bottom seal

Slather some dishwashing detergent onto the slots along the bottom track or spray them with silicone. Then insert the vinyl seal and pull it into place. Cut off the excess vinyl with a utility knife and crimp the ends of the track with a pair of pliers.

Most steel doors have a track along the bottom to hold a vinyl seal. The vinyl can harden from sun exposure and crack or break off in sections, letting in cold air. Installers usually crimp the slots at each end of the track to retain the seal. Open the crimps and slide out the old seal. Then install the new one.

Step 8: Test the door

Test the garage door

A properly balanced garage door should stay in place if you lift it part-way and let go. However, insulation adds weight to the door, and that may throw off the balance. If your door falls after you let go of it, give us a call on 03 9338 8006 to readjust the spring tension. Leaving the door in an unbalanced state can damage your garage door opener.

Want a free quote on Insulated Garage Doors?

Call us on 03 9338 8006 or email us at 






  • Posted byvicuser
  • January 17, 2020
Posted in Blog