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Best basement waterproofing pros near Dunbarton, NH

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TRUSTED BY DUNBARTON, NH HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon17
    Verified basement waterproofing services reviews

Top-Rated Basement waterproofing pros in Dunbarton - Updated Nov 2026

Avatar for Northern Basement Systems
Northern Basement Systems
4.6(
21
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Dunbarton, NH and surrounding areas

Approved

In business since 2010

Free estimates

Warranties offered

"Northern basements was able to fit us in quickly, pulled our crooked cement wall back in-place and sealed the wall to prevent future leaks.  The work was timely, communication was friendly and detailed, and price was as to be expected for the large amount of work that needed to be done.  We are very pleased with the whole process as well as the results.
"
Additional Photos
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Additional Photos

+25

Response time1 day
4 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for NH Projects LLC
NH Projects LLC
5.0(
20
)
Basement Drainage Channels - Install

Serving Dunbarton, NH and surrounding areas

Approved

In business since 2021

Free estimates

Customers say: Quick response

"Lenny and Nick are great to work with! We are finishing our basement and they just completed the bathroom to start and it came out fantastic! They have excellent contacts to help with the plumbing and electricity and made the whole process easy for us. We can't wait to keep working with them and completing our basement."
Our Work
Our Work
Our Work
Our Work
Our Work

+8

Response time5 hrs
Response rate87%
1 neighbors recently requested a quote
Avatar for IDEAL SOLUTIONS LLC
IDEAL SOLUTIONS LLC
4.8(
13
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Dunbarton, NH and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"I had an excellent experience with Ideal Solutions on my basement remodel. From start to finish, the team was professional, communicative, and detail-oriented. The quality of the work exceeded my expectations, and the finished basement turned out even better than I imagined. Everything was completed on time, and they made the entire process smooth and stress-free. I would absolutely recommend Ideal Solutions to anyone looking for basement remodeling or home improvement work."
17 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for Heritage Home Service
Heritage Home Service
4.5(
464
)
Basement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Dunbarton, NH and surrounding areas

Approved (Corporate)

In business since 1988

Free estimates

Emergency services offered

"be sure to enroll in their annual maintenance program. It is very cost effective and the folks who have come to the house have been outstanding. They all have a great work ethic and are very courteous"
Generator Installation
Light Fixture Service
Oultet services
Indoor Outlet Service
HVAC Outdoor Unit

+16

Response time1 day
385 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for E & Z EXCAVATION LLC
E & Z EXCAVATION LLC
5.0(
23
)
Basement Drainage Channels - Install

Serving Dunbarton, NH and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"Eric was right on point and identified the solution and scope of work very promptly. He is a very good communicator via text and in person. I thought his pricing was very fair. He worked to install gutter on my roof, drainage piping, and a trench drain on the side of my driveway to mitigate erosion. He rototilled, fertilized, and installed sod on my formerly eroded front lawn. The work came out fantastic and my neighbors keep complementing me on how nice my house looks now."
Rock wall
Rock wall
Rick wall
Culvert
Culvert

+8

Response time8 hrs
Recommended by90%of homeowners
Avatar for Quantum Contracting, LLC
Quantum Contracting, LLC
4.3(
38
)
Basement Drainage Channels - Install

Serving Dunbarton, NH and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

"Quantum Contracting is great! Tyler and Austin are very professional and hard workers. Very efficient and my porch looks fantastic. I would hire them again in a flash and they are very honest and fair and really know what they are doing."
Small Garden
Complete Landscape Renovation
Grade Work
Brick Pathway
Small Retaining Wall

+23

Response time2 days
Response rate89%
10 neighbors recently requested a quote
Corriveau Construction Company
5.0(
6
)
Basement Drainage Channels - Install

Serving Dunbarton, NH and surrounding areas

Approved

In business since 1972

Free estimates

Customers say: Quick response

"I could not be happier with the work performed by Bob and his team. They were extremely profession, delivered everything promised, were prompt and friendly! Our project turned out even better than we thought possible and the cost was extremely fair. I would highly recommend Corriveau Construction!!"
Response time1 day
6 neighbors recently requested a quote
Recommended by60%of homeowners
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Basement Waterproofing FAQs, answered by experts

Underfloor insulation alone will not cause moisture and mold, but improper installation can. Although the purpose is to seal any drafts, your subfloor still needs ventilation. If you seal the area too tightly and prevent all airflow, this can cause moisture to get trapped. This moisture eventually leads to mold and—if your floors are wood—rotting.

If a crawl space isn’t vented, there can be moisture buildup, which can lead to mold damage, easily destroying the foundation of your home. A closed-off crawl space can trap heat, which can be useful in the winter, but can also trap dangerous gases and prevent clean air from entering the home through the floorboards.

Yes, outside leaks can easily cause damage to your home if you don’t have waterproofing measures in place. Regularly check your property for signs of a leak, ensure your home’s landscaping is at least at a 5% slope, your basement windows are sealed, and you have an aligned gutter system to catch rainwater.

Although the two terms are closely related and often used interchangeably, pier and beam foundations and crawl spaces are different things. A pier and beam foundation is made up of concrete piers and wooden beams and creates a space under the home known as a crawl space. There are several types of foundations that create crawl spaces, often collectively known as “crawl space foundations,” but the crawl space itself is separate from the foundation. 

You’ll need to reseal the foundation every five to 10 years, depending on the sealant you’ve used, the moisture conditions present in and around your home, and the condition of your foundation. Having a foundation inspection conducted before reapplication can help you catch any problems before you begin resealing. Of course, if you notice any new leaks or other moisture problems at any time, it may be necessary to reseal the foundation sooner.

The Dunbarton, NH homeowners’ guide to basement waterproofing services

From average costs to expert advice, get all the answers you need to get your job done.