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Best basement waterproofing pros near North Star, DE

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  • Verified reviews icon125
    Verified basement waterproofing services reviews

Top-Rated Basement waterproofing pros in North Star - Updated Nov 2026

Avatar for Waterproofing One
Waterproofing One
4.7(
152
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving North Star, DE and surrounding areas

Approved

In business since 1999

Free estimates

Warranties offered

"They came out & explained how they were going to resolve the drainage issue from our basement & lawn. We were surprised at the depth of work they had done to ensure that this issue was resolved for the new owners. They did as they said they would do per the estimate. These guys worked so hard & got rained on a good bit of the day, yet that didn't stop them from completing the job. They went above & beyond. It has been over a month now & we are very pleased to see no drainage issues. Thanks Waterproofing One for coming to our rescue! Dave & Lisa"
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+7

6 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Basement Waterproofing Nationwide Inc
Basement Waterproofing Nationwide Inc
4.6(
188
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving North Star, DE and surrounding areas

Approved

In business since 1987

Free estimates

Emergency services offered

"Basement Waterproofing Nationwide did excellent work in a timely and proffessional manner for a reasonable and appropriate fee. They said they would complete the work in 1-2 days and were done in one day. They were very careful and left things neater than they were before they came. We have used them before with great success and would use them again. So far, the problem we had, water in our basement, has not recurred, and our basement is bone dry. Tnank you Basement Waterproofing Nationwide."
Additional Photos
Response time2 days
12 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Quality 1st Basement Systems, Inc
Quality 1st Basement Systems, Inc
4.6(
230
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving North Star, DE and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"We are currently happy with the basement waterproofing and remodeling that was completed! There were issues - most minor but we haven't anything to compare as this was the first-time having contractors complete basement work for us; and our home is almost 100 years old. They were flexible given unexpected issues that came about with the basement. The water proofing was done first and they did a great job. They were happy to review and resolve any remaining questions/concerns and/or issues. Jorge in the service dept. is professional, punctual and is a great representative and asset for this company."
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+129

Response time10 hrs
Response rate100%
22 neighbors recently requested a quote
Avatar for Basement Gurus, LLC
Basement Gurus, LLC
4.8(
217
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving North Star, DE and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Warranties offered

"From start to finish this company gets things done the right way. I would highly recommend to anyone needing any type basement work done especially waterproofing. These guys are the best in the business! Thank you Basement Gurus for my dry basement."
100 Ft 4 inch HDPE to drywell
Concrete Replacement
Egress Installation
Walls After Wall Pin Installation
After Concrete has been removed

+339

Response time1 day
538 neighbors recently requested a quote
Recommended by68%of homeowners
Basement Waterproofing Specialists
4.0(
597
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving North Star, DE and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"I had a serious basement flooding problem. I had my basement waterproofed 2 times. it didn't work! Basement Waterproofing Specialists installed a commercial drain system and after 2 years I have never had a drop of water they are AMAZING, thank you Basement Waterproofing specialists YOU ARE THE BEST!"
Foundation Repair
 Before and After Stone Work
 Mirra Drain
 Mold Remediation
 Clean Work Areas

+67

Response time11 hrs
281 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Completely Dry Waterproofing
Completely Dry Waterproofing
4.6(
16
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving North Star, DE and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"I would recommend Completely Dry Waterproofing because they have excellent salespeople who thoroughly explain the work to be done. They arrive promptly, work neatly, clean up thoroughly, and offer a very competitive price. And, my basement is dry where they completed their work."
Response time1 day
Response rate94%
8 neighbors recently requested a quote
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Basement Waterproofing FAQs, answered by experts

Yes, it is possible to over-dehumidify a house by removing too much moisture from the air. This can create an overly dry environment that negatively affects those with respiratory or skin issues, and may cause your skin, hair, and sinuses to feel dry. However, this is unlikely to happen with most modern dehumidifiers, as they are equipped with moisture sensors and adjustable settings. These features allow the unit to pause automatically when the desired humidity level is reached, preventing the air from becoming uncomfortably dry. In contrast, older or more basic dehumidifiers left running for too long could potentially over-dry the air. To avoid this, aim for a balance between removing excess moisture and maintaining a comfortable environment. You can often monitor your home's humidity levels using a modern thermostat for guidance.

Methods include interior sealants, exterior excavation and waterproofing membranes, sump pump installation, and vapor barriers for encapsulation. Techniques vary based on the structure and severity of moisture issues.

Living in a finished basement is acceptable, but only if the space has the proper points of egress and includes smoke and carbon monoxide (CO) detectors to ensure the safety of the occupants. A good way to ensure your finished basement is suitable for use as living space is to get the basement finishing project properly permitted.

Yes, the air from a damp basement can travel up into your living area through a process called the stack effect, so moisture, mold spores, and other debris in your basement air can all decrease your indoor air quality on your main floors. Additionally, damp basements can promote the rotting of building materials, which can damage flooring, insulation, and framing on your first floor in addition to materials in the basement.

Installing storm windows can protect your home’s interior from heavy storms. Most storm windows are made with enamel-coated aluminum with screens and sliding glass panels. They also make your house more energy-efficient. The average storm window cost is $12,000, ranging between $4,250 and $19,850, depending on mounting, window types, glass types, and frame materials.

The North Star, DE homeowners’ guide to basement waterproofing services

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