Encasing your garage with comforting insulation and elegant drywall is more than just a cosmetic enhancement – it’s a strategic decision that elevates your property’s worth and reduces your energy expenditures. The amount of money you spend will depend on the choice of insulation material and the dimensions of your garage.
The cost to insulate and drywall a 2 car garage will range from $1,940 to $6,120. While most homeowners pay around $4,550 for the full insulation, including walls and ceilings.
A single car garage will be about half the price as a two car garage..
Several factors, such as the size of the garage, and insulation method, will determine the project’s overall cost. Let’s have a look.
| Insulation method | Cost per sq ft (materials only) |
|---|---|
| Fiberglass insulation roll | $0.88 - $1.64 |
| Cellulose insulation | $1.20 - $2.50 |
| Wet-spray cellulose insullation | $0.6 - $1.80 |
| Dense-pack cellulose insulation | $2.00 - $2.50 |
| Rigid foam insulation | $0.25 - $1.40 |
| Open-cell spray foam insulation | $0.45 - $0.65 |
| Closed-cell spray foam insulation | $1.00 - $1.50 |
Fiberglass insulation cost
Ideal for: Unfinished ceilings, floors, and, and also for DIY projects.
The cost of this insulation method will vary according to the area that needs to be covered, labor, and a few other factors. However, the average cost ranges from $0.88 to $1.64 per square foot. For labor expect to pay between $25 to $50 per hour of labor. Since this is not an extremely difficult home improvement project, most homeowners choose to install it themselves.
Cellulose insulation cost
Ideal for: Unfinished attic floors and existing enclosed walls.
Depending on the type of cellulose necessary, the cost of installed insulation will vary. This is the average cost of different types of cellulose insulations:
- Cellulsose roll insullation $1.20 – $2.50;
- Wet-spray cellulose insulation $0.6 – 1.80;
- Dense-pack cellulose insulation $2.00 – $2.50.
Rigid foam insulation
Ideal for: Insulating thin walls and garage doors.
Rigid foam insulation will cost you around $0.25 to $1.40 per square foot for materials only, and the cost of the labor varies from $0.25 to $0.50 per square foot. Rigid foam insulation is usually sold in 8-by-4 foot boards and the total cost depends on the thickness of the board and its R-value.
Spray foam insulation
Ideal for: Open cavities of the walls and ceilings to create an air seal.
Spray foam insulation is used as an alternative to fiberglass insulation and is applied during construction. There are two types of spray foam insulation available, open-cell and closed-cell. For open-cell insulation, expect to pay $0.45 to $0.65, and for the closed-cell from $1 to $1.50 per board foot.
Pros and cons of different insulation methods
As we already mentioned there are different insulation methods available. All of them have some advantages and disadvantages. They are listed below.
Fiberglass insulation roll
| Pros | Cons |
|---|---|
| DIY project | Possible irritation of eyes, skin, and lung |
| Budget friendly | Inappropriate installation can cause fire |
| Prone to moisture accumulation |
Cellulose insulation
| Pros | Cons |
|---|---|
| Made from recycled paper so it is eco-friendly | Not a budget friendly |
| Fire-resistant | Must be used with drywall |
| Insect-resistant | Not suitable for DIY because it is inflexible |
Rigid foam insulation
| Pros | Cons |
|---|---|
| Poor heat conductor | Not insect resistant |
| Budget friendly | Too airtight |
| Soundproof | Rigid and difficult to fit |
Spray foam insulation
| Pros | Cons |
|---|---|
| Good R-value | Not a budget friendly |
| Easily fill cracks and corners | Not a DIY project |
| Mold and insect resistant | Shrinks over time |
Factors that determine the cost to insulate and drywall the garage
Several factors will determine the project’s overall cost. Here is an explanation.
Garage size
Garages come in different sizes depending on the number of cars they can accommodate. Insulation cost will vary depending on the insulation method, and how insulation material is used. Also, it is very important what you will insulate, the whole garage or only the walls, ceiling, or garage door. Anyway, expect to pay between $0.50 to $1.25 per square foot.
For example, if your garage can accommodate three cars, it implies that the floor’s total surface area would be around 240 square feet multiplied by three cars. That would be considered when calculating the amount of material used per square meter of walls.
Number of cars accommodated
Most homeowners and contractors prefer to measure the area of the garage by the number of cars that can be accommodated rather than by the total square footage.
When you know the size of the garage in square feet then you can easily calculate the insulation cost.
For example, a one-car garage is 240 square feet in size. So if the specific insulation method used costs $1 per square foot the insulation cost will be $240.
Why to insulate your garage?
The garage is one of the most frequently used places in the home and must be in good condition. Here are some of the reasons why you should insulate your garage:
- You can use your garage as a comfortable place to carry out different types of activities and works;
- In case of fire, instillation will prevent toxic fumes from getting into the house;
- In severe humid seasons, insulation can help prevent rust in your car, tools, or some valuable equipment;
- Make your home more energy-efficient, and will reduce electricity bills;
- Soundproofing;
- Protect your walls, pipes, and other fittings.
Most essential parts of the garage to insulate
The insulation of the whole garage is an important task, but I think that a list of the most vital parts to insulate will be helpful for you:
- Garage door;
- Attic;
- Garage walls;
- Garage floor.
Garage door insulation
You have two options available for garage door insulation, you can install insulation material on the existing door, or you can replace the door with a new, already insulated door.
If you choose to insulate the existing door it is very important to determine what type of door your garage uses. For steel doors, you should use foam made for steel frames for steel doors. You should use stiff insulation material for wooden garage doors, and rigid foam boards are perfect for flat garage doors.
Attic insulation
If you manage to provide decent insulation to your attic area you can significantly reduce your heating bills. A variety of insulation materials such as fiberglass, cellulose, and many more can be used for this project. However, the insulation material would be dependent on how airtight your attic is.
Garage wall insulation
Garage walls are maybe the most important part to insulate in the garage. Proper insulated garage walls can exterminate noise, and provide a pleasant atmosphere without the coldness of a bare wall. When choosing material for garage wall insulation choose a solid material with a higher R-value per inch of thickness.
Garage floor insulation
Garage floor insulation is very important if your garage serves a multipurpose function. A well-insulated garage would make all the difference when it boils down to comfortability and energy