COST CALCULATOR

How Much Does It Cost To Insulate A Crawl Space?

Q: What is the cost difference between insulating crawl space walls and the ceiling?

For a 1,000-square-foot space with 3-foot-high walls, the average cost of insulating the walls is between $420 and $1,900. The average cost for insulating the ceiling in that same space is between $1,000 and $4,500.

Q: Why do I need to insulate my crawl space?

An uninsulated crawl space allows outside air into the home or heating and air-conditioning to leave the home, which can drive up the cost of your energy bill. It can also result in cold floors or burst pipes due to freezing.

Q: What is the recommended R-value for crawl space insulation?

The recommended R-value for crawl space insulation depends on the home's climate, since colder climates will require a higher R-value. Generally, the recommended R-value range falls between R-13 and R-30.

Q: What are the benefits of crawl space insulation?

Preventing drafts and cold floors. Improving indoor air quality. Reducing energy bills. Keeping out rodents. Preventing pipes from bursting due to freezing. Creating a moisture barrier.

Q: How much does it cost to clean and repair crawl space insulation?

Depending upon the condition of the insulation and the type of repairs needed, you can expect to pay between $500 and $8,000. Potential repairs can include foundation repair, mold removal, pest control, and more.

Typical range: $342-$767

Find out how much your project will cost

Zip Code

cost to insulate a crawl space Calculator

For your project in zip code 43215 with these options, the cost to insulate a crawl space starts at $1.14-$2.56 per square foot. Your actual price will depend on job size, conditions, finish options you choose.

Crawl space insulation installation costs probably aren’t something you’ve given much thought to — especially if you’ve never owned or rented a home with a crawl space before. For those who are curious, crawl spaces are low-ceilinged areas beneath the home's main part that are used for additional storage. But not all homes have these built-in storage spaces, and there’s a good chance that if you’ve got a crawl space under your home, it’s unfinished.

In this guide, you’ll learn about the different types of crawl space insulation, how much insulation costs, and whether or not you should hire a professional to get the job done.

While a crawl space is an excellent place to store lawn and garden equipment, outdoor toys, building supplies, and other items you don’t use every day, an unfinished and uninsulated crawl space could draw heat and air conditioning out of your home. Insulating your crawl space can make your home more energy efficient and prevent your HVAC unit from having to work harder to make your home comfortable.

Naturally, the material cost of insulating your crawl space depends on the type of insulation you’re using, how much insulation you need, and whether you choose to have a contractor install it for you.

Cost Calculator

Zip Code

Calculations are dependent on where you live

Square Feet

Standard Services		Quantity	Low	High
What you can expect
Range per square foot:			$1.14	$2.56
Range for this type of project:			$342	$767
Estimate: $554
	Batt Insulation Cost	320 square feet	$175	$409
	Cost of residential-grade, 15" x 40' roll of insulation batting for friction-fit installation between common framing. R-value energy efficience rating of 3.4 per inch of thickness. Rate is inclusive of local delivery, as well as standard excess for perfect installation and occasional repairs.
	Batt Insulation Labor, Basic	4 hours	$129	$314
	Labor cost, under typical conditions, for a complete installation. Batt insulation will be fit and secured between floor joists. Fee is inclusive of all aspects of the project, such as thorough planning, acquisition of equipment and material, preparation and protection of project site, and meticulous cleanup.
	Batt Insulation Job Supplies	320 square feet	$38	$43
	Requisite supplies for the job, including fasteners, vent flow baffles, and sealing tape.

Standard services

Batt Insulation Cost
$175 -$409

320
square feet

Cost of residential-grade, 15" x 40' roll of insulation batting for friction-fit installation between common framing. R-value energy efficience rating of 3.4 per inch of thickness. Rate is inclusive of local delivery, as well as standard excess for perfect installation and occasional repairs.

Batt Insulation Labor, Basic
$129 -$314

4
hours

Labor cost, under typical conditions, for a complete installation. Batt insulation will be fit and secured between floor joists. Fee is inclusive of all aspects of the project, such as thorough planning, acquisition of equipment and material, preparation and protection of project site, and meticulous cleanup.

Batt Insulation Job Supplies
$38 -$43

320
square feet

Requisite supplies for the job, including fasteners, vent flow baffles, and sealing tape.

Optional Services

What you can expect

Range per square foot:
$1 - $3

Range for this type of project:
$342 - $767

Estimate:
$554

Cost Comparison

YOUR ESTIMATE

$554

NATIONAL AVERAGE RANGE

$355 -$796

YOUR ESTIMATE

Insulate a Crawl Space: national average cost

The national average materials cost to insulate a crawl space is $0.95 per square foot, with a range between $0.57 to $1.33. The total price for labor and materials per square foot is $1.92, coming in between $1.18 to $2.65. A typical 300 square foot project costs $575.57, with a range of $355.02 to $796.11. Your actual price will depend on your location, job size, conditions and finish options you choose.

cost to insulate a crawl space
National Avg. Materials Cost per square foot	$0.95
National Avg. Cost (labor and materials) for 300 square foot	$575.57
National Cost Range (labor and materials) for 300 square foot	$355.02 - $796.11

Crawlspace Insulation Cost Factors

Several factors can affect your overall crawl space insulation installation cost. These factors are as follows:

The size of the area. The total square footage, or the height of the crawl space, will affect the amount of material needed.
Accessibility. If the crawlspace is difficult to access, this will affect the cost of labor associated with insulating your crawlspace, as the job will take longer.
Faced vs. unfaced. Faced batting averages $0.10 to $0.25 per square foot more than unfaced batting.
Location. Geographical locations with harsher temperatures require thicker insulation, causing your crawl space insulation cost to be more expensive.
Space venting. A vented crawl space may require sealing to meet your city’s current building codes.
Insulation removal. If your contractor has to remove and dispose of old insulation, you can expect to pay $0.75 to $2.00 per square foot for the service.
Advance preparation. Using spray foam insulation requires the surface to be cleaned first, which will increase the labor time.

Insulation type

There are four main types of insulation, as follows:

Closed cell spray foam. This type is considered to be the best for insulating crawl spaces. The average total cost of closed-cell spray foam installation is between $850 and $6,700, without the cost of labor.
Rigid foam board. Rigid foam boards may be made from polyisocyanurate (ISO), expanded polystyrene (EPS), or extruded polystyrene (XPS). The average cost to insulate the walls of a crawlspace is between $500 and $1,600. The average cost to insulate the subfloor of a crawlspace is between $1200 and $3700. Each of these costs is without the additional cost of labor.
Blown-in. This type of insulation is not typically recommended for crawl spaces, but it can be useful in spaces that are too tight for any other type of insulation. On average, the cost to insulate a crawl space using blown-in insulation is between $1000 and $2800, without the cost of labor.
Roll and batt. This type of insulation can be made of fiberglass, natural fibers, plastic, or rockwool and is best for the subfloors of dry, air-conditioned areas. The average cost of insulating the subfloor of a crawlspace with roll and batt is between $900 and $1400, without the cost of labor.

Cost of Installation

The average labor cost associated with installing insulation in a crawl space is $0.50 to $1.30 per square foot, with actual prices varying according to the type of insulation. For example, batting is the fastest to install, whereas spray foam requires some time for preparation but typically installs faster than foam board.

Cost Per Square Foot

The cost of insulation per square foot is naturally different for each type of insulation. Roll and batt insulation, for example, has an average cost between $0.90 and $1.40 per square foot, while closed cell spray foam averages between $2.00 and $5.00 per square foot.

Spray foam insulation for crawl space cost

Since spray foam insulation is the best option for insulating a crawl space, it’s also the more expensive type. With a material cost of $2.00 to $5.00 per square foot and a labor cost of $0.50 to $1.30, you can expect a total cost range of $2.50 to $6.30.

DIY or hire a pro

Although it is certainly possible to install crawl space insulation on your own, it is best to hire a professional due to the multi-faceted nature of this kind of project.

In order to effectively insulate crawl space, the following tasks need to be done: