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Best basement waterproofing pros near Dahlgren, IL

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

Avatar for RW Construction
RW Construction
4.8(
23
)
Basement Drainage Channels - Install

Serving Dahlgren, IL and surrounding areas

Approved

In business since 2018

Free estimates

Credit card accepted

"Had a front door installed where there had not been one. Contractor went above and beyond what was expected by installing insulation and OSB where we had already removed existing siding. Contractor cleaned up and removed all debris from job site. We will be using this contractor for other projects in the near future."
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5 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Crawlspace / Basement Waterproofing Solution
Crawlspace / Basement Waterproofing Solution
4.4(
256
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Dahlgren, IL and surrounding areas

In business since 1998

Free estimates

Credit card accepted

"I know of no other contractor who has total customer satisfaction as his top priority like Mr. Flanagan does. He is absolutely the best.
My basement sustained ankle-deep water as the result of an outdoor basement stairwell drain that violently backed up because its circa-1951 drain line led to the street storm sewer (by design). That sewer was overcome with water during a storm in the summer of 2010 that featured a tornado in my western-suburbs area. Soon after pumping the water out of my basement with a mobile pump, the mess prompted me to (once again*) call Mr. Flanagan (*His crawlspace crew had done a beautiful job finishing my dirt-floor crawlspace with a concrete floor and wall insulation a couple of years earlier).
After the basement waterproofing project described in this review was complete, however, I was disappointed with the workmanship: The concrete work looked less-than-professional (out-of-flush with sump flange and the stairwell drain, plus way too many swirl marks and splattering) in the stairwell and basement's appearance areas. In short, it just didn't look like his business's flawless concrete job that was done in my crawlspace just years earlier.
Mr. Flanagan agreed. With no questions asked, he immediately had a different crew come to my home, tear out all of the previously laid concrete and drain lines and replace it with the workmanship that he would expect his crews to use in their own homes. The re-do of the project at least had met my high expectations for its cosmetics. And, of course, I hoped it was a sufficient waterproofing solution for my basement.
Fast forward just a few short years. Affter having perhaps sustaining that 100-year event with the Chicago-area rain storm of April 17-18, 2012, while my neighbors are pumping water out of their basements, mine remains bone dry. Thank you Mr. Flanagan and Crawlspace / Basement Waterproofing Solutions for a job (design and installation) well done. Your basement waterproofing solution indeed deserves an A+.

"
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+13

Recommended by90%of homeowners
Avatar for Basement Seepage Solution Inc
Basement Seepage Solution Inc
3.6(
29
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Dahlgren, IL and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"Basement Seepage Solutions was my fifth quote. I almost canceled because I was sick of getting quotes and all the big companies charge about the same $70-90 per foot of drain tiles. Matthew's company beat these quotes hands down. He charges $50 a foot plus $10 off a foot for Angies list members (a savings of $1000 for me.). This company beat the next lowest quote by $3,600 so this was a no brainer. Matthew's company did excellent work. They were on time and professional and communicated with me the entire time. Also, Matt is on site during the process and is not just a sales man who comes for a quote then sends out a crew. The job took two days mainly due to the Villages inspection schedule. But I think this is preferable over the big companies that want to do it all in one day but are in your house from 8-8. Highly recommend if you need any sort of basement work done"
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+8

Recommended by70%of homeowners
Avatar for AOM Remodeling and Restoration
AOM Remodeling and Restoration
4.6(
52
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Dahlgren, IL and surrounding areas

In business since 2012

Free estimates

Emergency services offered

"David gave me what I thought was a fair price for the work to be done. He asked for 1/2 up front. As a previous small business owner I did not feel this was unreasonable so I paid him 500.00. He estimated the work would take 3 to four days and I thought the same. After several no shows the "mason" showed up. The first clue was he came in a car. According to my wife he was here 2 hours and left, came back for another 2 hours the next day and left again. He said nothing to my wife about leaving or when he would be back. David called a day later to ask about coming out to look over the job and get the rest of the other 500.00. I said he isn't finished and he's only been here 4 hours. So then I looked up the prevailing wage in IL for a mason and found out it is 28.50 an hour. The next day the guy comes back for another 3 hours. David came to look at the work and I walked him around and showed him all of the places that had not been done. So the guy comes back again for about an hour. All told it was 8 hours work, nothing to write home about but it was agreed up front that I wasn't looking for an exposed brick look. I need it tuck pointed well enough so that I could drylock and paint the exposed brick. I will say this was done in the end. The worker left a mess that I and my wife had to clean up, I pointed this out to David as well. I told him I felt he was overly paid for the amount of work preformed and that was the end of it. It's really to bad. It's difficult to get contractors to do small jobs and I had plenty for him to do. I'm not unhappy, just would not hire again"
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blue and white trim room

+5

Recommended by90%of homeowners
Avatar for McDonagh & Sons Plumbing & Sewer Inc
McDonagh & Sons Plumbing & Sewer Inc
4.1(
69
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Dahlgren, IL and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"I walked into my basement on Saturday afternoon to discover a pool of water on the floor.  Looking at the walls I traced it back to right above the window that sits below my kitchen sink.  I popped the paneling off the top of the window box and immediately saw that the galvanized pipe leading from the sink drain to the stack had corroded and a hole had formed.  Frantic because it was 4pm on a Saturday and I knew I couldn't use my kitchen sink or dishwasher until I got this fixed (no easy task with two toddlers to keep up with), I jumped onto Angie's List looking for a plumber with Saturday hours and a good rating. 
I called McDonagh and was told they could have someone at my place in an hour.  Todd showed up at 5:30 and immediately got to work.  Patrick (the owner) showed up with his son Nolan shortly thereafter to take a look and get Todd some parts off of his truck.  We gave Nolan a piece of the pizza my kids were having for dinner as an apology for interrupting his Saturday too.  Patrick came back with a price estimate that seemed fair to me for emergency short-notice service on a Saturday night.  Todd replaced the entire section of pipe from the sink drain to the stack and was finished and out the door by 7:30, leaving us with a fully functional kitchen again. 
Huge thanks to Patrick and Todd (and Nolan) who really saved the day for us.  These guys are absolute professionals and really saved us from some major inconvenience.  Would absolutely recommend and use them again.
"
Recommended by96%of homeowners
Avatar for RW Construction
RW Construction
4.7(
21
)
Basement Drainage Channels - Install

Serving Dahlgren, IL and surrounding areas

In business since 2018

Free estimates

Offers commercial services

"Roger was very helpful at a frustrating time in our lives. Everything was going wrong on the new property. His company came in and cleaned off the land and leveled it after digging to find clay and packing new clay on top, so we could set our new home up. He found the water line, electric line, and sewer line. He replace the water and sewer and set the electric pole up for Ameren to connect to. He was amazing, efficient, and capable. I highly recommend him."
Response time1 day
Response rate93%
Recommended by95%of homeowners
Agape Construction & Improvement
4.0(
60
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Dahlgren, IL and surrounding areas

In business since 2009

Free estimates

Emergency services offered

"removed leaves from roof and checked gutters.  They originally provided the service on Nov. 8, 2013 but I did not know they were providing the service on that date.  I called to set up service date on Nov.12, 2013 and even though the service had been provided the crew came back on Nov. 15th to be sure the gutters were functioning properly.  I will definitely use this service again."
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the home owners are very happy!
all done!!

+1

Recommended by90%of homeowners
Service One Contracting Services, Inc.
5.0(
2
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Dahlgren, IL and surrounding areas

In business since 2001

Free estimates

Welcome to Service One Contracting Inc. We are excited to exceed your expectations. As experts, we will handle your needs with the high quality expertise that your home or business deserves. We offer competitive prices and customer satisfaction is our number one priority. Call us now! \n

Response time7 hrs
Recommended by100%of homeowners
Avatar for D&D Directional Drilling & Underground Services
D&D Directional Drilling & Underground Services
5.0(
5
)
Basement Drainage Channels - Install

Serving Dahlgren, IL and surrounding areas

In business since 2021

Free estimates

Offers commercial services

We take great pride in our experience, expertise, quality and customer service that \nwe provide to meet your needs. It is our mission to provide excellent workmanship \nand complete customer satisfaction from start to completion of a project. \nIn order to understand the needs and expectations of our customers, \nwe take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large \nor small the job. \n

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+1

Response time2 days
Response rate100%
Recommended by100%of homeowners
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Basement Waterproofing FAQs, answered by experts

Ideal humidity conditions generally range from 30% to 50%, with 45% considered optimal humidity for most homes. If your humidity levels drop below that range, you can turn your dehumidifier off. Additionally, suppose the temperature where the dehumidifier is installed falls below 60 degrees Fahrenheit. In that case, it's best to turn it off and unplug it since cooler temperatures can cause the unit's coils to freeze.

Yes, you can finish a basement that leaks, as long as you address the leak first. Before finishing a basement, you’ll need to repair any cracks in the walls and waterproof the basement to prevent future leaks. It’s much harder to clean up a water leak from a finished basement than an unfinished one, so preemptively addressing any leaking areas prevents expensive repairs in the future.

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. 

Below-ground shelters are the best in terms of durability, but there is a risk of flooding and obstruction. Modern technology and rigorous construction requirements make above-ground shelters a better option for accessibility, safety, and, usually, your budget. They may not have the same aesthetic appeal, but many of their features make above-ground shelters a better option. 

To ensure your basement walls are waterproof, it's crucial to address any existing moisture issues before finishing. Inspect for signs of water seepage, such as dampness or discoloration, and repair any leaks or cracks. Install a vapor barrier to prevent moisture from penetrating the walls, and consider waterproofing paints or coatings.

Proper drainage systems, such as interior or exterior waterproofing, can also be beneficial.

The Dahlgren, IL homeowners’ guide to basement waterproofing services

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