Should I add insulation to my garage?

You should only insulate a room if it contributes to the comfort of the inhabitants or the protection of objects, systems or installations housed there. If you are only using your garage to store a vehicle, it is not necessary to insulate the space.

Will insulating my garage make a difference?





If you are looking to reduce your energy costs, the best bet is to put time and energy into insulating the attic space over your attached garage. This helps balance the temperature in that part of your house. Unfortunately, insulating your garage will not make much of a difference with your energy bills.

What is the most cost effective way to insulate a garage?

Fiberglass roll insulation is the cheapest and easiest type to install, provided that your garage’s interior walls have not been constructed. Unroll the insulation between the wall studs with the vapor barrier facing the inside of the garage.

Should I insulate an unheated attached garage?

The bottom line is that insulating even an unheated detached garage can make it better by making it more livable and prolonging the life of your car and other precious belongings. It does not cost much and you can do it yourself.

Why is my attached garage so cold?

Just like with broken panels, the main reason why your garage gets so cold in the winter is because cold air is coming right in. If your garage door is old and hangs crookedly, there’s going to be an unprotected sliver near the ground.

How much does it cost to insulate a 20×20 garage?





Garage Insulation Cost by Size

Size Average Costs (Installed)
12′ x 20′ (240 sq.ft.) $572 – $6,600
20′ x 20′ (400 sq.ft.) $780 – $9,000
20′ x 30′ (600 sq.ft.) $1,040 – $12,000
20′ x 40′ (800 sq.ft.) $1,300 – $15,000


Is it worth insulating garage walls?

Adding insulation to a garage delivers a great return on investment in terms of energy savings throughout the year, and the benefits don’t stop there. A well-insulated garage can help extend the life of your vehicles, increase the value of your home, and even provide critical protection against fires.

Can you insulate a garage after drywall installed?

You can insulate a finished garage, without removing the drywall by drilling small holes in the drywall and filling in the gap either using Injection Foam Insulation or Blown In Insulation. Each method has its pros & cons, but both are effective and will reduce your energy cost.

Will drywall crack in unheated garage?



Having a drywall interior wall in an unheated garage will not be a problem, even in freezing winter conditions provided the garage is kept dry and well ventilated.

Do I need a vapor barrier when insulating my garage?

If the garage is heated, you will need a vapor barrier, otherwise you will get frost and mold. Some argue that the car itself will cause the garage to be heated, but this would only be the case if you left the car to warm up in the morning, otherwise it would not have the chance to warm the garage.

How do you insulate an attached garage attic?

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Quote from Youtube video: You most likely have a ridge vent. Or you have some roof vents. That look like this or you may have both. Main thing is you don't want to block. All the airflow from that soft event if you do that.

Should ceiling above garage be insulated?



If your home’s HVAC system does extend into the garage, then the attic above it should be insulated as it would for any other room of the house. This will serve the same function of keeping hot or cold air inside the garage as it does for the rest of the house.

Which way should insulation face in a garage?

You can either use faced or unfaced insulation when insulating your garage. If you use faced insulation, the paper side should face the inside of the garage. Alternatively, when using unfaced insulation, it is recommended that you add a vapor barrier over the garage walls after installing the insulation.

Can I leave insulation exposed in garage?

Insulation should not be exposed in the garage if possible. Exposed insulation can cause coughing, itching, general irritation, and can even get in your eyes or lungs. While it’s best if all rooms with insulation be covered, the occupied areas are the priority.

Do you need a vapor barrier with faced insulation?

Since vapor barriers are only additional protection and not required to finish faced insulation, they are not always necessary. In fact, in some parts of the United States, it is better to not add vapor barriers as they can do more damage than good to your insulation.