A wet basement is more than just a hassle. It can threaten your home’s structure, air quality, and long-term value. The American Society of Home Inspectors reports that over 60% of U.S. homes deal with some kind of basement moisture, and if left untreated, water damage can cause mold, cracks in the foundation, and expensive repairs. Picking the right waterproofing company ensures you get an accurate diagnosis and a system installed by skilled professionals.
This guide reviews the top basement waterproofing companies for 2026, covering their service areas, unique systems, pricing, warranties, and honest pros and cons.
Our Top Picks
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- Largest certified dealer network
- Patented, proven system designs
- Lifetime transferable warranties
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- Handles waterproofing and foundation repair
- Strong Midwest reputation since 1975
- Honest, no-pressure inspection process
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- Proprietary, integrated system design
- In-house installers, not subcontractors
- Wide national footprint in 30+ states
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- Handles structural and waterproofing together
- Engineered systems for severe conditions
- Lifetime limited warranty on structural work
How We Rated the Best Basement Waterproofing Companies
We rated each basement waterproofing company on a 1 to 5 scale using seven factors: product selection and quality (25%), pricing and value (20%), customer experience (15%), warranty and policy (12%), installation services (10%), availability and access (10%), and brand reputation (8%). Learn more about how we rate basement waterproofing companies in our rating methodology.
- Basement Systems: National
- Thrasher: Midwest
- Groundworks: National
- Ram Jack: National
- U.S. Waterproofing: Midwest
- American Waterworks: Midwest
- Olshan: South
- Acculevel: Midwest Primarily
- Erie Home: Midwest
Basement Systems
- Average Estimated Cost: $2,500 to $8,000
- Service Area: Nationwide (50 U.S. states + parts of Canada)
Our Take
Basement Systems is a top choice for homeowners looking for a waterproofing solution that is backed by a national company but installed by well-trained local crews. Its patented products, consistent dealer training, and transferable lifetime warranties offer homeowners both wide access and strong long-term protection. However, installation quality and pricing can vary by dealer region, so it’s important to check these details before you sign a contract.
- Services Offered: Interior drainage, sump pumps, vapor barriers, crawl space encapsulation, wall stabilization
- Warranty: Lifetime transferable on most systems
- Financing: Available through dealer network; terms vary by location
Cost Information (Estimated)
- Interior drain tile system: $2,500 to $6,000
- Full waterproofing + encapsulation: $6,000 to $8,000
- Sump pump or backup upgrade: $1,000 to $2,000
Best Services to Consider
WaterGuard® Interior Drainage System: This patented perimeter drain is installed at the footing level, not in the concrete slab. This design helps reduce the risk of clogs and lowers long-term maintenance. It’s a good option for basements that often have water seeping in along the walls.
TripleSafe™ Sump Pump: This system uses three pumps — a primary pump, a backup pump, and a battery-powered emergency pump. It’s designed for homes in areas that often lose power or have high water tables.
Thrasher Foundation Repair
- Average Estimated Cost: $3,000 to $10,000
- Service Area: Midwest (NE, IA, KS, MO, IL, CO)
Our Take
Thrasher is a leading choice for Midwest homeowners who want one company to handle both basement waterproofing and foundation repair, sometimes even in a single visit. The company is known for honest assessments, skilled crews, and a strong transferable warranty program. However, Thrasher only serves six Midwest states, so it’s not available everywhere.
- Services Offered: Interior and exterior waterproofing, sump pumps, foundation repair, crawl space encapsulation, wall anchors, piering
- Warranty: Lifetime transferable on waterproofing systems
- Financing: Available; terms vary by project
Cost Breakdown (Estimated)
- Interior drainage system: $3,000 to $6,500
- Crawl space encapsulation: $4,000 to $8,000
- Foundation repair + waterproofing combo: $7,000 to $10,000+
- Sump pump installation: $1,200 to $2,500
Best Services to Consider
CleanSpace® Crawl Space Encapsulation: This is a heavy-duty vapor barrier system that seals crawl space walls and floors to keep out moisture, mold, and outside air. It’s especially effective in Midwest climates where humidity levels can change a lot.
TrenchDrain™ Interior System: Thrasher’s interior perimeter drainage channel routes water away from foundation walls and into the sump system before it reaches your floor.
Groundworks
- Average Estimated Cost: $2,000 to $10,000+
- Service Area: Nationwide (33 states)
Our Take
Groundworks is a well-known name in the industry, offering its own product line and using in-house installers instead of subcontractors. The company operates in 33 states, giving it one of the largest service areas among waterproofing companies. Its AquaStop™ system combines drainage, sump protection, and vapor management into a single solution.
- Services Offered: Interior drainage, sump pumps, dehumidifiers, crawl space repair, foundation repair, vapor barriers
- Warranty: Lifetime transferable on waterproofing systems
- Financing: Available; subject to credit approval
Cost Information (Estimated)
- Interior drainage installation: $2,000 to $5,000
- Full AquaStop™ waterproofing system: $5,000 to $10,000+
- Sump pump + battery backup: $1,200 to $3,000
- Crawl space encapsulation: $3,500 to $8,000
Best Services to Consider
AquaStop™ Waterproofing System: Groundworks’ flagship system pairs its BasementGutter™ interior drainage channel with its AquaStop™ sump pump and CrawlSeal™ vapor barrier for a complete solution. Best suited for basements with multiple water entry points.
Ram Jack
- Average Estimated Cost: $4,000 to $12,000+
- Service Area: Nationwide (25+ states)
Our Take
Ram Jack is a good choice when basement water problems are combined with structural issues like bowing walls, uneven floors, or foundation cracks that a waterproofing-only company can’t fix. Ram Jack is best known for its engineered steel pier and wall anchor systems, but its waterproofing division also offers drainage, sealing, and vapor management. The company works through licensed dealers in many parts of the U.S., but availability varies by region.
- Services Offered: Interior drainage, crack injection, wall anchors, sump pumps, helical and steel piers, crawl space repair
- Warranty: Lifetime limited warranty on structural systems; varies for waterproofing
- Financing: Available through dealer network
Cost Information (Estimated)
- Interior drainage or crack sealing: $2,500 to $6,000
- Foundation repair + waterproofing combo: $8,000 to $12,000+
- Sump pump or wall sealing: $1,000 to $2,500
Best Services to Consider
Ram Jack HydroGuard™ Drainage System: This interior drainage system is made to work alongside structural repairs. It channels water to the sump pump while Ram Jack’s pier and anchor systems fix the underlying cause of wall movement. It’s best for basements where water problems are caused by foundation shifting.
U.S. Waterproofing
- Average Estimated Cost: $2,000 to $7,000
- Service Area: Midwest (IL, WI, IN, and parts of neighboring states)
Our Take
U.S. Waterproofing stands out for its customer-first approach, offering free inspections, written estimates, and no high-pressure sales. Its Dry Basement Guarantee program includes a transferable warranty and a post-install inspection. However, U.S. Waterproofing only serves the Midwest, so homeowners in other regions will need to look elsewhere. The company also does not provide full foundation repair services for structural problems.
- Services Offered: Interior drain tile systems, crack injection, sump pump installation and replacement, exterior waterproofing, window well drains
- Warranty: Transferable lifetime warranty through Dry Basement Guarantee program
- Financing: Available on qualifying projects
Cost Breakdown (Estimated)
- Crack injection or minor sealing: $500 to $1,500
- Interior drainage system: $3,000 to $6,000
- Full waterproofing project: $5,000 to $7,000
Best Services to Consider
Dry Basement Guarantee Program: This is U.S. Waterproofing’s main service, combining interior drain tile installation, a post-install inspection, and a transferable lifetime warranty. The warranty transfers to the next owner when you sell your home, which can be a strong selling point in a competitive real estate market.
American Waterworks
- Average Estimated Cost: $2,000 to $7,000
- Service Area: Midwest (MN, ND, IA, and WI)
Our Take
American Waterworks is a strong regional choice for homeowners in the Midwest who want professional waterproofing at local prices, not national-brand rates. As a certified Basement Systems dealer, the company can install patented WaterGuard® and TripleSafe™ systems while keeping local pricing and scheduling. However, its regional focus means it’s not available outside this area, and it doesn’t offer as many structural repair services as larger companies.
- Services Offered: Interior drainage, sump pump installation, vapor barriers, crawl space encapsulation, wall crack repair
- Warranty: Lifetime transferable (as a certified Basement Systems dealer)
- Financing: Available on qualifying projects
Olshan Foundation Solutions
- Average Estimated Cost: $3,000 to $10,000
- Service Area: Primarily Southern U.S. (AL, AR, CO, FL, GA, IN, KS, KY, LA, MN, MS, MO, NE, NC, OH, OK, TN, TX)
Our Take
Olshan Foundation Solutions has been in business for over 90 years, offering both waterproofing and foundation repair services, mainly in the southern part of the U.S. Its WaterLock™ Plus System combines interior drainage with wall-sealing membranes for long-lasting protection. Olshan’s technicians customize each solution to fit the specific conditions and soil at your site.
- Services Offered: Interior and exterior waterproofing, sump pump installation, foundation repair, piering, crawl space moisture control
- Warranty: Lifetime transferable warranty on most systems
- Financing: Available; terms vary by market
Cost Information (Estimated)
- Interior drainage system: $3,000 to $6,000
- Comprehensive waterproofing: $6,000 to $10,000
- Moisture barrier installation: $1,500 to $3,500
Best Services to Consider
WaterLock™ Plus System: This is Olshan’s main waterproofing solution, combining a wall drainage membrane, a perimeter drain tile, and a sump pump. The transferable lifetime warranty is one of the strongest in the industry for projects that include both waterproofing and structural repairs.
Acculevel
- Average Estimated Cost: $2,500 to $7,500
- Service Area: Midwest (IL, IN, IA, KY, MI, MO, OH, WI) + PA & VA
Our Take
Acculevel is a dependable, family-owned contractor with a solid reputation in the Midwest. The company is known for clear pricing and responsive customer service, which is helpful in a field where contractors can be hard to compare. Acculevel specializes in interior drainage, crawl space encapsulation, and foundation stabilization, and offers a life-of-structure warranty on most waterproofing jobs.
- Services Offered: Interior drainage, sump pump installation, crawl space encapsulation, vapor barriers, dehumidification
- Warranty: Lifetime transferable warranty on most installations
- Financing: Available on qualifying projects
Cost Breakdown (Estimated)
- Interior drainage system: $2,500 to $5,000
- Crawl space encapsulation: $3,000 to $7,500
- Sump pump installation: $1,000 to $2,500
Best Services to Consider
AccuDry™ Crawl Space Encapsulation System: This system uses a heavy-duty vapor barrier on crawl space walls and floors, along with a sump pump and dehumidifier, to keep out ground moisture and prevent mold. It’s a good fit for older homes in Indiana and Ohio, where crawl spaces often lack proper ventilation.
Erie Home
- Average Estimated Cost: $3,000 to $9,000
- Service Area: Midwest (IN, KY, MI, NY, OH, WI; waterproofing not available in all locations where Erie Home operates)
Our Take
Erie Home scores lower than most competitors on this list because basement waterproofing is not its primary specialty — the company is better known for roofing, gutters, and home exterior services. Its waterproofing division is available in select markets and offers interior drainage and sump pump solutions that can be combined with other Erie Home projects.
Homeowners who already plan to work with Erie Home on roofing or gutters may benefit from the convenience. Those whose primary need is waterproofing are better served by a company with deeper expertise in this category.
- Services Offered: Interior waterproofing, sump pump installation and backup, dehumidification, gutter and exterior water management
- Warranty: Available; terms vary by service and market
- Financing: Available nationally; multiple plan options
Cost Breakdown (Estimated)
- Interior waterproofing system: $3,000 to $6,000
- Sump pump and battery backup: $1,200 to $2,500
- Complete basement package: $6,000 to $9,000
Best Services to Consider
Erie Shield Waterproofing Program: This is Erie Home’s bundled interior waterproofing solution, which includes a perimeter drainage channel, optional sump pump upgrades, and a dehumidifier. It’s most cost-effective when combined with a roofing or gutter project, where Erie Home can coordinate all the work.
