Insulation service costs depend on your project and location. Check with a local pro for your specific job.
Professional crawl space insulation costs between $2,600 and $16,900, and your space size and materials set the total.
Your insulation type and material selection drive your cost, with fiberglass batts lower and closed-cell spray foam higher.
You should budget for cleaning and add-ons like encapsulation or removal, adding $1,000 to $15,000 total.
Hiring a local insulation company ensures the job is done right, improving comfort and reducing moisture problems.
In 2026, the national average cost for crawl space insulation is $3,550 for a typical 1,000-square-foot crawl space. Most homeowners pay between $2,600 and $16,900, with the spread driven by crawl space size, insulation type, and material selection. Adding insulation to your crawl space may help lower energy bills and keep your home comfortable year-round.
Several variables shape your total crawl space insulation cost, including insulation type, material, crawl space size, labor, prep work, location, and any removal of existing insulation. Understanding each factor helps you build a realistic budget before getting quotes from a pro.
Crawl space size is one of the biggest drivers of your total insulation cost, with materials running $0.30 to $6.75 per square foot on average. Most crawl spaces fall between 250 and 2,500 square feet, putting material costs in the range of $75 to $16,900 depending on the size of your space. Costs for crawl space insulation vary by size, as the breakdown below shows:
| Crawl Space Size (Square Feet) | Average Price Range in 2026 |
|---|---|
| 250 | $75–$1,700 |
| 500 | $150–$3,400 |
| 1,000 | $300–$6,800 |
| 1,500 | $450–$10,100 |
| 2,000 | $600–$13,500 |
| 2,500 | $750–$16,900 |
When it comes to crawl space insulation type, fiberglass batts and rolls often have the lowest overall costs, while spray foam comes with the highest price tag. Here's how insulation type affects cost per square foot and with labor:
| Insulation Type | Average Cost Per Square Foot (for Materials) in 2026 | Average Cost Per Square Foot (with Labor) in 2026 |
|---|---|---|
| Batt and Roll | $0.30–$1.50 | $0.55–$2 |
| Blown-In and Loose-Fill | $1–$2 | $1.25–$2.50 |
| Rigid Foam Board | $0.25–$2 | $0.50–$2.50 |
| Spray Foam | $1–$4 (per board foot) | $3–$8 |
Both batt and roll insulation cost between $0.30 and $1.50 per square foot for a total of $300 to $1,500 in materials for a standard crawl space of 1,000 square feet. These materials consist of fiberglass and are very DIY-friendly, thanks to the ease with which they can be installed.
The average cost to install blown-in insulation or loose-fill insulation is between $1 and $2 per square foot or $1,000 to $2,000 per 1,000 square feet of space. These types of crawl space insulation are made from cellulose, and they're best left to professional insulation installers. That said, if you're up for a task, you can learn how to install cellulose insulation yourself using a blowing machine and safety equipment.
Most rigid foam board insulation costs between $0.25 and $2 per square foot on average, not including labor. This means you'll spend somewhere between $250 and $2,000 to install this type of insulation in a standard crawl space. Rigid foam boards come in panels, making them easy to install but more challenging to customize for uniquely shaped crawl spaces.
Spray foam is priced by the board foot, a unit equal to 1 square foot at 1 inch thick. Spray foam insulation costs between $1 and $4 per board foot on average. The total installed cost, including labor, often ranges from $3 to $8 per square foot for a typical 3-inch application. Spray foam comes in many different types, with polyurethane spray foam costing the least. Open-cell foam insulation is the most budget-friendly, while closed-cell spray foam insulation falls toward the higher end of the price range.
Crawl space insulation materials range from $0.30 to $6.75 per square foot, with polystyrene and fiberglass at the affordable end and wood fiber at the top of the price range. The table below shows the different costs of crawl space insulation by material:
| Insulation Material | Average Cost Range (per Square Foot) in 2026 |
|---|---|
| Fiberglass | $0.30–$1.50 |
| Cellulose | $0.60–$2.30 |
| Mineral wool | $1.40–$3.10 |
| Polystyrene | $0.25–$0.50 |
| Wood fiber | $4.25–$6.75 |
When most people think of what insulation is, fiberglass is a popular material that comes to mind. Fiberglass costs anywhere between $0.30 and $1.50 per square foot and is commonly used in attic roof insulation, subflooring, and between joists. While fiberglass isn't ideal for crawl spaces due to its vulnerability to moisture, it can perform well when paired with proper vapor barriers or full encapsulation. Note that costs vary depending on the insulation's thickness and R-value.
The average cost of cellulose insulation is between $0.60 and $2.30 per square foot. For small crawl spaces, cellulose can make for an easy installation because it's blown into the crawl space to fill the area. The higher cost is largely due to the equipment needed to install cellulose.
Mineral wool insulation costs range from $1.40 to $3.10 per square foot, depending on the quality of the material. You'll pay more for mineral wool insulation because of the higher manufacturing costs, but it's environmentally friendly because it's made from up to 40% recycled materials.
Polystyrene rigid foam boards cost between $0.25 and $0.50 per square foot. As the cheapest crawl space insulation material, polystyrene is great for those looking for an effective, water-resistant option.
Another water-resistant insulation for crawl spaces is wood fiber, which costs between $4.25 and $6.75 per square foot. Wood fiber insulation boards are eco-friendly, but they come at a higher cost than all other insulation materials because of their limited availability.
Labor from a local insulation company adds $0.25 to $0.50 per square foot to your project, bringing the total installed cost to $0.55 to $7.25 per square foot, depending on the material chosen. Spray foam carries the highest labor cost, while batts and rolls tend to be the least expensive to install.
Prep work is often necessary before insulation can be installed, and the cost depends on your crawl space's current condition. Cleaning alone runs $0.55 to $2.70 per square foot on average, or $550 to $2,700 for a typical 1,000-square-foot crawl space.
Your location influences what you pay for crawl space insulation, with higher cost-of-living areas pushing prices toward the top of the range and lower cost-of-living regions landing closer to the bottom. Crawl spaces that are difficult to access can also increase your total when installers charge by the hour, since harder-to-reach spaces take more time to complete.
Removing existing crawl space insulation costs $1 to $1.50 per square foot, with the total depending on the material in place. Batts and rolls are the easiest to remove and sit at the lower end of that range, while spray foam is more time-consuming and pushes costs higher.
Crawl space insulation generally requires no ongoing expenses, though routine inspections are worthwhile to catch water damage, pests, or moisture buildup before they become larger problems. If issues are found, you may need to budget for occasional repairs before or after installing new insulation.
The average cost to repair a crawl space runs $0.55 to $2.70 per square foot. In most cases, patching damaged insulation is not the most effective long-term solution; if your boards are compromised or water damage has affected your fiberglass, full removal and replacement is typically the better path.
While you might be tempted to install crawl space insulation yourself to save on labor ( $0.25 and $0.50 per square foot— or $60 to $1,250 total) , you should defer to an insulation company near you . This is especially important if you don't have experience installing insulation or plan to use spray foam insulation, which benefits from the expertise and precision of a trained professional.
While you can technically DIY insulation, crawl space insulation is a deceptively nuanced project. Hiring a pro comes with many benefits, including:
Pros know which insulation type is best for your specific space.
Air-sealing gaps is important in order to avoid a drain on the HVAC system.
A pro can check for issues with your foundation or attic when they are installing the insulation.
Homeowners likely won't have the right tools for the job, and considering the safety aspects, shouldn't try to rent or purchase them.
The work of a pro will come with a warranty, so you'll be covered if there are any manufacturer defects.
Installing insulation in tight spaces is a challenging task, so homeowners may not install it properly.
Professional work will increase the thermal efficiency of your home and reduce moisture issues.
While we don't recommend you actually install the insulation yourself, there are some steps you can take to speed up the project or reduce costs, including:
Removing old insulation yourself is only recommended if you are 100% certain there are no harmful chemicals present.
Ensuring the crawl space is empty so the pros can move freely.
Providing a copy of your electricity bills for one year, which might help a pro decide which insulation is best.
Addressing any other issues before this project, such as pest issues or moisture problems.
When insulating your crawl space, several add-on services are worth considering, including encapsulation, sump pump installation, pest removal, and mold remediation. Costs for these services vary widely depending on the scope of work involved.
Crawl space encapsulation cost: $5,000 to $15,000
Sump pump installation cost: $3,900
Pest removal cost: $110 to $260
Mold remediation cost: $500 to $2,000
There's no way to get around this, insulating a crawl space can add up big time. But with a few tips and tricks, you can save on the cost of insulating your crawl space. Consider the following money-saving solutions to cut back on costs.
DIY the installation if you feel confident doing so.
Opt for low-cost materials like fiberglass or polystyrene boards.
Choose batts, rolls, or rigid foam board insulation.
If you choose spray foam insulation, open-cell insulation is cheaper up front.
Prepare the space yourself to save on hourly labor costs.
Be prepared to discuss more than just insulation, as having “eyes on” in your crawl space can reveal other issues in your home.
If possible, try to schedule this work outside of a heatwave or cold snap, as this will make the work easier on your pro.
If there is room in the budget, consider encapsulating the crawl space to prevent moisture damage and pests.
Gather floor plans or crawl space diagrams to help a professional navigate while working and to assist them in building an accurate quote.
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
If you’re good people wanting to do business with good people, hire Matt. He is a consummate professional and utterly competent. He installed a water heater in my home at a price that beat competitors by hundreds of dollars with a promise to support the unit for its life (even after its 6 yr...
Greene's Plumbing ServicesI would recommend this company to anyone! He showed up on time, was friendly, completed a very difficult repair on our dryer vent cover, was responsive, and pricing was extremely fair and competitive. I would have him back to do any of our repairs or cleanings without hesitation!
U.S.A. Dryer Vent, LLCBest cleaning I've had at my property
I conferred with 2 other contractors before Armstrong Electric. Nick and his crew showed me that the project was not as convoluted as the other contractors made it appear to be. They completed the entire project on time. They were professional, friendly and cleaned up after at completion. I...
ARMSTRONG ELECTRIC, LLCOur exterior looks brand new thanks to Custom Paint Jobs LLC. Theyre the best in town!
Custom Paint Jobs, LLCExcellent experience with hiring Tether House to Mount our 77’ Samsung TV in our bedroom. Fast, friendly, and knowledgeable. Highly recommend.
Tether HouseThe techs on my project, Shawn and Cliff, were great. They were prompt, courteous, and efficient. I am very happy with the results and would definitely contact Mr. Electric for any future electrical projects.
Mr. Electric of ColumbusWe had our houses windows and back door replace this summer by Window Depot USA of Central. He gave us grate advise and saved my family lots money. The team did a fantastic job with installation. If you need help, they sure get job done right!
Window Depot USA of Central OhioBeginning with the estimate, Larry and Peyton were super helpful in getting my new condo's interior re-painted. Not only was the job well done, but also done in a super timely manner as promised.
Five Star Painting of Plain City and PowellGreat job...edging and pre clean up went well with a great job with seal coat. Friendly, efficient and professional.
All Star Paving and SealingFrom average costs to expert advice, get all the answers you need to get your job done.
Crawl space dehumidifier costs are worth it if you consider their effect on energy bills and avoiding moisture damage. Learn what makes up the total cost of the project.
A variety of factors can affect your total crawl space encapsulation cost. Here’s a breakdown of the cost of this project, whether you hire a pro or DIY.
Crawl space repair costs can seem intimidating, but putting them off can lead to bigger issues. Learn about repair costs in this guide to set your budget.
Crawl spaces are more than a small, uninhabitable space beneath your home. Learn how insulating your crawl space can make the area useful.
Insulating a crawl space is an essential step toward reducing mold, offensive smells, and moisture damage potential. Learn helpful tips here.
Before investing in a pricey vapor barrier, does crawl space encapsulation add value to your home? The answer is a little more complicated than you expect.
