Walls Waterproofing in Mandan, ND
Damp drywall, peeling paint or white crust on block walls? We find the water source and waterproof walls in Mandan, ND for good.
- Shower Wall Membrane Systems
- Licensed & Insured
- Durable Waterproofing Systems
- Licensed, Insured Technicians
Protect Your Home, Call for Walls Waterproofing in Mandan, ND.
Protect the long-term health of your property with our reliable waterproofing services.
Dependable Walls Waterproofing Services in Mandan, ND
HPN Plumbing specializes in lasting walls waterproofing that protects foundations from weather and soil movement. Heavy, expansive clay soils are common in North Dakota, and they swell and shrink with moisture and frost, stressing foundations and buried pipe. Water penetration can lead to structural damage, mold growth, and lower property value, which is why we offer tailored solutions.
Our expertise includes:
- Foundation crack repair and sealing
- Interior drainage system installation
- Exterior foundation coating application

Additional Plumbing Maintenance Services in Mandan, ND
Our maintenance and specialty plumbing services in Mandan, ND catch small problems before they become emergencies.

Customers
Why Choose HPN Plumbing for Walls Waterproofing in Mandan, ND?
We use moisture meters and thermal cameras to map wet areas without tearing out more drywall than needed. That keeps repair costs and mess to a minimum.
- Mold Prevention, Drying and sealing walls promptly keeps mold from taking hold.
- Skilled Crew, Our technicians are trained in the latest waterproofing techniques and safety practices.
- Home Protection, Walls waterproofing prevents structural damage and mold growth and preserves your property's value and indoor air quality.
Citywide Coverage
We waterproof walls in every neighborhood of Mandan, from older block homes to newer stucco construction. Our crews handle bathrooms, laundry rooms, garages and exterior foundation walls.
Experienced Team
Each technician is trained on modern liquid and sheet membranes and the manufacturer requirements for each. That training keeps warranties valid and results consistent.
Safety-First Approach
When HPN Plumbing handles your walls waterproofing, you can be sure that the work will be performed safely and correctly. Our methods are designed not only to protect your home from water but also to maintain its structure according to all relevant codes.
Trusted Certified Mandan Plumbing Services Professionals
At HPN Plumbing, we take pride in providing certified plumbing services throughout Mandan, ND. Backed by leading industry credentials, our experienced plumbers combine technical skill with genuine customer care. Whether it is repair, installation, or maintenance, we follow strict safety and quality standards to deliver long-lasting results you can trust.
Call Us Now
PHCC Plumbing Contractor Recognition
Better Business Bureau (BBB) Accreditation
Angi Certified Pro
ISO 9001 Quality Management CertificationProven Walls Waterproofing Solutions in Mandan, ND
Sump Pump Installation and Repair in Mandan, ND
Sump pumps are a critical part of many interior waterproofing systems, particularly in homes that see heavy rainfall. We install high-capacity sump pumps designed to handle large volumes of water, keeping your basement dry even during heavy storms. Our services include primary sump pump installation, battery backup sump pump systems for power outages, and routine maintenance or repair of existing units. We make sure the discharge line is routed correctly so water does not circulate back toward the foundation.

Crawl Space Vapor Barriers in Mandan
Many homes in Mandan have crawl spaces, which are highly susceptible to moisture issues. Installing a heavy-duty vapor barrier on crawl space walls and floors is a key waterproofing strategy. This thick polyethylene sheeting prevents ground moisture from evaporating into the crawl space, protecting subflooring and joists and improving indoor air quality. It's an affordable way to control humidity and prevent wood rot.
Below-Grade and Basement Wall Waterproofing in Mandan
Housing in North Dakota is a mix of older farmhouses, mid-century homes and newer construction, each with different plumbing materials. Wherever a home has a basement or below-grade walls, heavy rain and snowmelt can push water through foundation walls and cracks. We seal cracks with injection products, apply interior or exterior waterproofing and install drainage where needed. A sump pump may be added if groundwater collects.
Crawl Space Encapsulation in Mandan
Crawl space encapsulation involves sealing the crawl space entirely with heavy-duty vapor barriers and often includes a dehumidifier. This not only waterproofs the walls but also controls humidity, preventing mold growth and wood rot in the crawl space. Strong winds and extreme cold can push frost into walls and crawlspaces, reaching pipes that seem well protected. An encapsulated crawl space can significantly improve indoor air quality and energy efficiency by keeping moisture from moving up into the home. We use tough, reinforced poly sheeting for walls and floors, sealed at all seams and penetrations.
Exterior Block Wall Waterproofing in Mandan, ND
Block and stem walls often show efflorescence, which is the white mineral crust left when water passes through masonry. Irrigation and sprinklers aimed at the house are frequent culprits. We adjust or reroute irrigation, clean the wall and apply a breathable masonry sealer or elastomeric coating. Proper grading and drip line placement help keep the wall dry.
Foundation Crack Repair & Sealing in Mandan
Even minor cracks in foundation walls can allow significant water intrusion. Our services include crack repair using epoxy or polyurethane injection to seal these entry points for good. This method fills the entire depth of the crack, restoring strength and preventing water penetration. We address both vertical and horizontal cracks, knowing that horizontal cracks can signal structural issues that need a thorough assessment before sealing. Addressing these early prevents further water damage and costly future repairs.
Shower Pan Leak Repair and Waterproofing in Mandan, ND
A cracked or poorly sloped shower pan often causes wet baseboards and stained ceilings below. We test the pan by plugging the drain and flooding it to confirm the leak. Then we rebuild the pan with correct pre-slope, a new liner or bonded membrane and a properly clamped drain. A second flood test confirms the pan is watertight before tile.

Interior Walls Waterproofing in Mandan, ND
Interior walls waterproofing focuses on managing water that has already passed through the foundation walls. This usually involves installing an interior drainage system, often called a French drain, along the perimeter of the basement floor. Water is collected and channeled to a sump pump, which then sends it safely away from the foundation. While not preventing water from entering the wall, it stops it from pooling inside your living space. This solution is less disruptive than exterior excavation and is suitable where exterior access is limited.
Expert Walls Waterproofing Near Me in Mandan, ND
When you need fast and effective walls waterproofing solutions, don't hesitate to call HPN Plumbing. We pride ourselves on timely service and lasting results, keeping your Mandan home dry and protected. Reach out today for a consultation.
We understand the building styles and irrigation habits common around Mandan. That local knowledge helps us spot the source of wall moisture fast. It also means we can return easily for follow-up or warranty work.
HPN Plumbing at a Glance
- Fully licensed plumbing team covering Mandan, ND
- 24/7 emergency service with same-day scheduling
- Clear written estimates, no hidden fees
- 4.9-star rated by 408+ North Dakota customers
Mandan Map
Mandan Information
- Population
- 24,586
- Area codes
- Local
- Service area
- Mandan and communities within 40 miles
- Nearby
- Bismarck, Dickinson, Minot, Jamestown
In Mandan, ND, irrigation runoff, storms and busy showers push moisture into block, stucco and drywall, so proper wall waterproofing protects your home's structure.
Expert Services
Trust our professionals for reliable HPN Plumbing solutions in Mandan, ND.
Our Specialized Plumbing Services in Mandan, ND
At HPN Plumbing, we provide a complete range of plumbing services across Mandan, ND. From leak detection to full system installations, our team ensures fast, precise, and affordable service for both residential and commercial properties. Explore our core services below:
How Our Walls Waterproofing Process Works in Mandan, ND
Our walls waterproofing process is designed for the best results and minimal disruption to your Mandan home. We follow a clear, systematic approach for lasting protection.
Request a Quote
Start by calling us at (701) 403-1348 or filling out our online form to schedule an initial consultation. We'll discuss your concerns and set up a good time for an on-site assessment.
Detailed Inspection
Our experts will conduct a careful inspection of your foundation walls, identifying the source of water intrusion and assessing the extent of any damage. We'll explain our findings in plain terms.
Custom Solution
Based on the inspection, we'll design a customized walls waterproofing plan for your home's needs. This includes selecting the most effective materials and techniques.
Frequently Asked Questions About Walls Waterproofing in Mandan
The cost of walls waterproofing in Mandan, ND can vary widely, typically ranging from $3,000 for interior crack sealing to $15,000 or more for extensive exterior foundation waterproofing with drainage systems. Factors like the size of the area, severity of water damage, chosen methods, and accessibility all affect the final price. We provide detailed, upfront quotes after a thorough inspection.
Look for signs such as damp or wet spots on basement or crawl space walls, a musty odor, visible mold or mildew growth, efflorescence, a white powdery residue, on concrete or brick, and standing water. Cracks in foundation walls or bowing walls also point to potential water entry issues. If you notice any of these, it's wise to get a professional inspection.
Yes, HPN Plumbing stands behind the quality of our walls waterproofing services. We offer comprehensive warranties on our materials and workmanship, giving you peace of mind. Warranty details will be provided with your project proposal, spelling out the coverage and duration of your waterproofing system.
Walls waterproofing is a primary step in preventing future mold growth by eliminating the moisture source. However, it does not remove existing mold. If mold is already present, it will need to be professionally remediated before or along with the waterproofing process. Once the area is dry and mold-free, waterproofing will help make sure it stays that way.
The duration of a walls waterproofing project varies significantly. Smaller jobs like interior crack sealing might take a day or two, while extensive exterior waterproofing with excavation and drainage system installation could take several days to over a week. We'll provide a clear timeline during your consultation.
Interior waterproofing addresses water after it has entered the foundation, typically managing it with sealants and drainage systems inside the basement or crawl space. Exterior waterproofing prevents water from reaching the foundation walls in the first place, usually by excavating and applying membranes or coatings to the outside of the foundation.
Key signs you need walls waterproofing include damp or wet basement walls, visible mold or mildew growth, a musty odor in your basement or crawl space, efflorescence on concrete walls, cracks in the foundation, or standing water after heavy rains. Don't ignore these warning signs, as they often point to ongoing water intrusion.
The duration of a walls waterproofing project varies depending on its scope. Minor crack repairs might take a few hours, while an interior drainage system could take 1 to 3 days. A full exterior foundation waterproofing project, involving excavation around the entire home, could take 3 to 7 days or more. We provide a clear timeline during our initial consultation.
What People Are Saying About Our Plumbing Experts?

Laura S.
I scheduled a water heater replacement, and the team made the process smooth and affordable. The new unit works perfectly, and they cleaned up after completing the job.
Water Heater Replacement · Mandan, ND
Mark T.
When our office needed drain cleaning, HPN Plumbing provided quick, reliable service. The plumber arrived on time and made sure every drain flowed perfectly before leaving. Very satisfied.
Drain Cleaning · Devils Lake, ND
Daniel K.
A pipe burst at 11 pm and they actually answered. The plumber showed up within the hour, shut everything down, and had us back to normal the next morning. Could not ask for more.
Emergency Plumbing · Minot AFB, ND
Patricia H.
We had a slab leak that two other companies could not find. HPN Plumbing located it in under an hour, explained our options, and the price matched the quote to the dollar.
Slab Leak Repair · Minot, ND
Robert G.
The trenchless sewer replacement saved our front yard. They walked us through the camera inspection footage first so we knew exactly what we were paying for.
Sewer Line Replacement · Minot AFB, ND
James P.
Our commercial plumbing system had a leak under the sink, and HPN Plumbing handled it professionally. The plumbers arrived quickly and restored everything without disruption to our customers.
Commercial Plumbing · Bismarck, ND













