crawl space insulation cost

Average Cost for Crawl Space Insulation

The average cost to insulate a crawl space is $1,950 or $1.95 per square foot for a 1,000 square foot crawl space. Many homeowners choose to insulate their home’s crawl space themselves, which saves on labor costs but might come with it the cost of tools in addition to insulation and materials. If you hire a professional to insulate your crawl space, he or she will clear away old insulation, prepare the crawl space for new insulation, complete the installation and clean up any leftover debris.

Average Do It Yourself cost

$0.95 – $1.35 / Square Foot

Average Contractor Installed Cost

$1.95/ Square Foot

Typical Cost Average

$1.50 – $2.80 / Square Foot

Last Updated: Thursday, April 7, 2022

Overview of Crawl Space Insulation

Crawl space, aka crawlspace, insulation keeps the area warmer in winter, which means the living space above it stays warmer too. The main reason homeowners take on this project is energy efficiency. Insulating your crawl space saves money on heating and cooling costs and keeps your HVAC system from overworking. But home comfort is important too.

This cost estimate looks at the cost factors involved in insulating a crawl space, types of insulation and their functions, and we also offer some DIY tips and materials to consider.

We do recommend this as a good DIY project if you are okay working in small spaces and getting a little dirty. If you don’t mind spending some quality time in your crawl space, the insulation process itself is fairly straightforward.

Product and Installation Supplies Cost Details

Crawlspace Insulation Cost Factors

The list of cost factors below is to help you know what to consider before beginning this project. The cost of insulating a crawl space can be as little as $0.95 per square foot if you DIY and stay thrifty with your materials. On the higher end, crawl space insulation can cost $2.80 or more per square foot for professionally installed, high quality insulation, especially with a high R-value, or resistance to heat transfer. This list of cost factors will help you home in on your project and form an accurate cost estimate.

  • Type of Insulation – There are three types of insulation that are used for a crawl space. Listed below is each type with its function. Most projects require more than one type.
    • Fiberglass Insulation: Also known as batt, blanket and roll insulation, fiberglass insulation is the fluffy pink material that comes in rolls. Fiberglass insulation works best between floor joists on the “ceiling” of a crawl space. It is commonly used  in crawl space rim joists too. This is the least expensive type of insulation, but it tends to soak up unwanted moisture. R-value ranges from about R-13 to R-30, or about R-2.7 to R-3.0 per inch.
    • Foam Board Insulation: Foam board insulation is affordable and good for big spaces. Three types of rigid foam boards are popular for crawlspaces. Polyisocyanurate, or poly-iso, is the costliest but wins the R-value battle with an R-6.8/inch rating. XPS, or extruded polystyrene, is next with an R-5 value per inch. Expanded polystyrene (Styrofoam) costs the least and has an R-Value of about 3.8/inch. Foam boards are great for big spaces, but they don’t work in small spaces or cracks.
    • Spray Foam Insulation: Spray foam insulation comes in two types. Closed cell spray foam insulation is waterproof, seals really well and has an R-value of 6.5/inch. Ideal for sealing around windows, vents and other openings, it can also be sprayed on walls of the crawl space. It’s the insulation of choice for crawlspace encapsulation too because it seals far better than other insulations. Open cell spray foam saves money, and if your crawl space isn’t damp and you don’t need the high R-value, it’s worth considering – with R-3.5 insulation value.
  • Insulation Level – The recommended insulation level for crawl spaces in the United States is R-19, though in mild climates you may be able to get away with R-13 or R-15. The higher the insulation level, the more it will cost.
  • Size of Crawl Space – This cost estimate uses a 1,000 square foot crawl space as an example, but a bigger crawl space will require more materials and labor.
  • Crawl Space Condition – How does your crawl space look? If there is a lot of debris, old insulation materials, mold, or any rotting wood, you’re going to need to do some prep work before you can begin insulating. If you spot any mold, make sure to call in an expert to remove it so that you and your household are protected.
  • Who Does the Installation – If you are going to hire a contractor to insulate your home’s crawl space, you can expect to pay about $0.60 – $1.25 per square foot for labor alone. If you’re planning to DIY, you will save money on labor costs, but you’ll need to purchase a few tools like a tape measure, utility knife, stapler, dust mask, gloves, and safety glasses.

Retail Crawl Space Insulation Costs

Here are retail costs for the type of insulation discussed above.

  • $0.30 – $0.40 per square foot | R-13 Fiberglass Rolls/Blankets/Batts
  •  $1.35 – $2.50 per square foot | 1”, R-6.8 Polyisocyanurate Rigid Foam Boards
  •  $0.58 – $0.70 per square foot | 1”, R-5.0 XPS Rigid Foam Boards
  • $0.40 – $0.50 per square foot | 1”, R-3.0 EPS Rigid Foam Board
  •  $0.55 – $0.70 per square foot | 1”, R-3.5 Open Cell Spray Foam Insulation Kit
  •  $0.95 – $1.25 per square foot | 1”, R-6.5 Closed Cell Spray Foam Insulation Kit
  • $6.00 – $12.00 per can | Expanding Spray Foam Insulation – Ideal for use around crawl space opening

Permits, Inspection, Related Costs and Installation Time

Permits and Inspection Cost

  • $0 | Insulating a crawl space does not require a building permit when no structural changes are made to the area.

Related Costs and Installation Time

  • 4 – 8 hours | A professional crew of 2-3 people will be able to insulate a crawl space in a matter of hours, while a homeowner with less experience may need a full workday to complete the project. Add an extra hour or two if you have significant prep work to do in your crawl space before beginning.

Related Projects

  • Cost of Crawl Space Encapsulation
  • Cost of Vapor Barrier in Crawl Space
  • Interior Basement Sealing
  • Sump Pump Installation
  • French Drains in Crawlspace or Basement
  • Cost of Block Foundation Repair
  • Mold Removal

Are You a Pro Fence Installer?

If so, head over to our Business Finance News Pro’s page, and help us make this page better and more accurate for both our visitors and your future customers.

DIY or Hire a Pro?

Insulating a crawl space is a project that will grow your skills as a homeowner and save you some money on labor costs. How much can you save? Homewyse puts labor at about 50 cents to $1.20 per square foot. Porch suggests a little lower labor cost at up to $1.00 per square foot. There is not a lot of technical skill required, so if you have the work ethic, you can do this!

DIY is not for everyone, and there are many homeowners who aren’t interested in spending that much time in their crawl space. We get it. That’s why we offer a tool that helps you get free, no-obligation cost estimates from contractors near you.

Photo of author

Author S Krone

A lawyer never retires. So I would just say that I am not as active as I used to be. Now I simply dedicate myself to fishing, my hobby, and my grandchildren. For Business Finance News I write about legal aspects of mortgage policies, mostly regarding the rights of policyholders. I also have articles about personal injuries.

Thank you for visiting

Leave a Comment

Business Finance

About Us

Business Finance News is a brand oriented to business owners and dedicated to analyzing and comparing the cost and conditions of B2B procurement of goods and services through free quotes delivered by business partners.


Address 5050 Quorum Drive, (75254) Dallas TX

telephone 844-368-6072


A personal loan is a medium term loan with a fixed interest rate that is repaid in equal monthly payments and it's usually limited to 24 months. Loan offers and eligibility depend on your individual credit profile. Our lenders can help you obtain as much as $3,000 depending on the lender, your state and your financial situation.

The owner and operator of is not a lender and is not involved into making credit decisions associated with lending or making loan offers. Instead, the website is designed only for a matching service, which enables the users contact with the lenders and third parties. The website does not charge any fees for its service, nor does it oblige any user to initiate contact with any of the lenders or third parties or accept any loan product or service offered by the lenders. All the data concerning personal loan products and the industry is presented on the website for information purposes only. does not endorse any particular lender, nor does it represent or is responsible for the actions or inactions of the lenders. does not collect, store or has access to the information regarding the fees and charges associated with the contacting lenders and/or any loan products. Online personal loans are not available in all the states. Not all the lenders in the network can provide the loans up to $3,000. cannot guarantee that the user of the website will be approved by any lender or for any loan product, will be matched with a lender, or if matched, will receive a personal loan offer on the terms requested in the online form. The lenders may need to perform credit check via one or more credit bureaus, including but not limited to major credit bureaus in order to determine credit reliability and the scopes of credit products to offer. The lenders in the network may need to perform additional verifications, including but not limited to social security number, driver license number, national ID or other identification documents. The terms and scopes of loan products vary from lender to lender and can depend on numerous factors, including but not limited to the state of residence and credit standing of the applicant, as well as the terms determined by each lender individually. 


APR (Annual Percentage Rate) is the loan rate calculated for the annual term. Since is not a lender and has no information regarding the terms and other details of personal loan products offered by lenders individually, cannot provide the exact APR charged for any loan product offered by the lenders. The APRs greatly vary from lender to lender, state to state and depend on numerous factors, including but not limited to the credit standing of an applicant. Additional charges associated with the loan offer, including but not limited to origination fees, late payment, non-payment charges and penalties, as well as non-financial actions, such as late payment reporting and debt collection actions, may be applied by the lenders. These financial and non-financial actions have nothing to do with, and has no information regaining whatsoever actions may be taken by the lenders. All the financial and non-financial charges and actions are to be disclosed in any particular loan agreement in a clear and transparent manner. The APR is calculated as the annual charge and is not a financial charge for a personal loan product. 

Late Payment Implications

It is highly recommended to contact the lender if late payment is expected or considered possible. In this case, late payment fees and charges may be implied. Federal and state regulations are determined for the cases of late payment and may vary from case to case. All the details concerning the procedures and costs associated with late payment are disclosed in loan agreement and should be reviewed prior to signing any related document. 

Non-payment Implications

Financial and non-financial penalties may be implied in cases of non-payment or missed payment. Fees and other financial charges for late payment are to be disclosed in loan agreement. Additional actions related to non-payment, such as renewals, may be implied upon given consent. The terms of renewal are to be disclosed in each loan agreement individually. Additional charges and fees associated with renewal may be applied. 

Debt collection practices and other related procedures may be performed. All the actions related to these practices are adjusted to Fair Debt Collection Practices Act regulations and other applicable federal and state laws in order to protect consumers from unfair lending and negative borrowing experience. The majority of lenders do not refer to outside collection agencies and attempt to collect the debt via in-house means. 

Non-payment and late payment may have negative impact on the borrowers’ credit standing and downgrade their credit scores, as the lenders may report delinquency to credit bureaus, including but not limited to Equifax, Transunion, and Experian. In this case the results of non-payment and late payment may be recorded and remain in credit reports for the determined amount of time.