Insulation of garage doors:

It is important to insulate a garage door, especially if your garage is connected to the rest of the house. It is common that garage doors are poorly insulated, and lead to large heat losses. Need advice on the insulation of a garage door? This page gives you all the elements you need to know to optimize the garage’s insulation.

Why isolate a garage door?

If you have already read our practical sheet on the insulation of a garage , you know that the door is often the weak point of a well insulated garage.

Many garage doors are not designed to retain heat . If this is not a drama in an independent and unheated garage, it can lead to a real waste of energy in a garage attached to the house.

Often, a poorly insulated garage door increases your heating bill, creating a significant heat loss in the garage. It is therefore important to remedy this lack of insulation! (Ask free quotes from professionals in your area for your garage door insulation work)

How to insulate a garage door?

If your garage door is poorly insulated and causes heat loss, the simplest solution is to invest in garage door insulation .

The ideal is to opt for a thin insulation, able to insulate the door slightly without weighing it down too much or hindering its operation.

Let’s take a look at the different steps needed to insulate a garage door.

To know: there are garage insulation kits, which include various elements to caulk a poorly insulated garage door. (For accurate and free quotes from professionals in your area for your work, fill out our form!)

1) Install insulation on the garage door
The most important step in insulating a garage door is to place a thin layer of insulation over the entire surface of the door. Bubble thermoreflector insulation is often used, which has good insulating power while remaining light .

Here’s how to install insulation on a garage door:

  • If the door is made of metal or PVC, the first step will be to clean it with a suitable product, so as to degrease it and facilitate the attachment of the insulation.
  • Once the door is clean and dry, you will be able to apply double-sided tape to the entire door. This step is useless for wooden garage doors.
  • Apply the adhesive per strip, so as to cover the entire garage door (the insulation is placed on the inside of the door). Work from left to right and from bottom to top. For a wooden door, you will staple the insulation directly on the door.
  • It will usually be necessary to cut the last strips to the right measurements, to adjust them to the dimensions of the door. Use for this a cutter and a cutting table.
    Once positioned, use a metallic adhesive roller to bond them to each other and leave no gaps between the tiles.

2) Insulate the joints of the garage door
The bulk of your door is isolated. But to further improve the insulation of the garage a little, it may be useful to think about also insulating the bottom of the garage door, as well as the joints.

With some garage doors, hot air can escape from the sides of the door, or under the door. Just like the sound insulation of a door , it is interesting to fill these different spaces.

Once again, there are renovation solutions that can alleviate this problem:

  • There are garage door sills, made of a flexible PVC brush. Simply screw the bottom of the door at the bottom of the garage, and eventually adjust its length.
  • There are also foam joints for the garage door, to stick on the contours of the garage door.
  • The disadvantage of these methods is that they do not fit all garage doors. Sometimes the installation of seals or a door sill can affect the opening or closing of the door.

3) Isolate the rest of the garage
If despite your efforts to insulate, the garage is still poorly insulated, the problem may concern something other than the door.

In some cases, it is essential to also isolate the walls of the garage, or even its ceiling. It’s up to you whether it’s necessary or not.

Feel free to read this method to insulate the ceiling of a garage if you want to know more.

Insulation price of a garage door
Now that we know how to apply a garage door insulator, remains to address the subject of the price.

You should know that the insulation of a garage door is often more accessible than you think:

  • It is necessary to envisage between 3 and 10 dollars of the m² for the purchase of a garage door insulation.
  • An insulation kit for garage door costs between 20 and 50 dollars on average.
  • Expect between 10 and 40 dollars for the purchase of a garage door sill.
  • Finally, count between 15 and 20 dollars for the purchase of foam seals for your garage door.
  • In some cases, it may be necessary to change your door, in favor of a better insulated garage door. It must then provide at least 700 euros, and sometimes more, for a quality door. (Have your work done free by professionals in your area by clicking here!)

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