With respect to the gaps between the side wall and garage door they need a combination approach for a better sealing.
Garage door leaks air on sides.
Especially garage door due to its large surface is the major factor in the total loss of your household heat.
Anchor the new seal using a hammer or screwdriver.
Depending on whether you have a wooden or metal garage door you ll need either nails or screws.
Cut the weather seal to the total length needed including the 6 to 8 inch excess with a utility.
Luckily you can prevent air from leaking through the sides and over the top of your overhead garage door.
After unrolling the new seal along the length of the garage door you re ready to begin installing.
Pull on one side of the old gasket and slip on the new seal.
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Therefore it is extremely important that your garage door to be well insulated and any gap or air leak sealed.
Measure the top and both sides of the overhead door opening with a tape measure and mark the center of the top.
Keep in mind that your garage door also has a seal that runs along the sides of the door.
Weatherstripping is inexpensive easy to install and available at any hardware or home improvement store.
How to stop air leaking from the sides and top of an overhead garage door 1.