Top-rated basement waterproofing pros.

Best basement waterproofing pros near Alton, IL

Enter your zip and get matched with up to 5 pros

TRUSTED BY ALTON, IL HOMEOWNERS

  • Average homeowner rating star icon4.2
    Average homeowner rating
  • Verified reviews icon46
    Verified basement waterproofing services reviews

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

Avatar for Roberts Foundation And Crack Repair
Roberts Foundation And Crack Repair
4.2(
164
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Alton, IL and surrounding areas

Approved

In business since 1991

Free estimates

Credit card accepted

"I had 4 different water proffing companys come to my house. Brad from Roberts was the second company. My husband was at work. Brad talked to me like I had a brain. He showed me on paper what would be done. He looked at my walls and told me I did not have any damage like walls pushing in. He gave me an estamate of how much it would cost. I called him back and ask if he could come back and explain some things to my husband. He came back. After talking to my husband we had decited to have Roberts do the work. My husband called Brad and he gave us a start date. The day for the work to start 3 truck came to my house. They were right on time. They came to my door and ask if they could back in my driveway. I told them yes it is big we  use to have a tractor trailer. Chad took me into the basement and walked me throw what was going to be done. The first thing the workers did was put things on my floor and covered the opening in my kitchen so no dust would come into my house. They got right to work. I heard the the jack hammers. They worked all day and took 20 minutes for lunch. When they left the first night they came and told me. My husband and I went into the basement and the floor around the walls had been jack hammered rock placed in the hole, pipe placed on the rock then more rock on top of the pipe. My husband wanted to do some plumbing so he had them jack hammer the floor in our shower room. Oh Yes the other 3 companys told us WE would have to tear our shower room out so they could Jack Hammer the floor. Brad told us just take the toliet and sink out and leave the walls and shower!!!!! That saved us at least $1000.00!!! They tunneled  under the walls and under our shower!!! They jack hammered the floor for my husband and he did his plumbimg. Today they came back right on time.The crew came in and said hi and went to work. They covered my floors and opening into my kitchen again. I thought it was going to take 3 days or more. They concreted around the floor over the rock and pipe. They concreted the bathroom floor where my husband did some plumbing and installed the sump pump. I really did not want a sump pump but did want a dry basement. They cleaned up and cleaned my floor. Mark came and got me. It was only 1:30. I thought he needed something. He said he wanted me to look. We went down stairs. Oh My Gosh!! It was done!! It looks like someone used a machine to smooth out the concrete. My floor was so clean. There was not rocks or concrete left on my floor. Mark poured a bucket of water in the sump pump to show me how it worked. I did not hear a motor running. This is going to be great!!! He showed me where he took the pipe out side where my husband wanted it. I told Mark my husband would take care of that but he said no that was his job and that is what he does. My husband is going to love that. He went over the warranty with me and I signed the papers. All of the workers were so nice. I never heard a bad word spoke and when they spoke to me they were all so nice.
 Roberts was not the cheapest waterproofing company but they saved me so much work and money by tunneling under my shower and walls that to me they were the cheapest!!! There work was unbelieveable. They were on time and what nice people work for Roberts. I will use them again if I ever have a need and will tell all of my family and friends to use them.
"
.
Response time3 days
21 neighbors recently requested a quote
Recommended by82%of homeowners
Affordable Upgrades
5.0(
46
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Alton, IL and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"Andrew did a fantastic job. He was very knowledgeable and explained the pros and cons of the different waterproofing methods he recommended I apply to my basement foundation to make sure it stayed sealed long term. He was very professional, a good communicator, cleaned up after himself, and made sure to provide updates throughout the work. He even repaired a cracked portion of my sewer while installing a sump pump. Would highly recommend! Not a lot of waterproofing companies out there like Affordable that are a one man show, which is the best part. One man job = one way communication and responsibility. It hurts me not to give him a full 5 stars, but the only minor con I can bring up was how the work was some charges tacked on at the close of the project, due to some extra cost he told me he incurred for the pipe/connections needed to repair/replace the cracked pipe. The labor materials for repairing the damaged pipe were listed on the original firm bid I received before the project started. As I said this was a VERY MINOR con and I feel you will not find a better contractor out there to replace Andrew for your waterproofing needs!"
Waterproofing system
Response time12 hrs
Response rate91%
15 neighbors recently requested a quote
Musick House Leveling, LLC
4.9(
29
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Alton, IL and surrounding areas

Approved

In business since 1987

Free estimates

Credit card accepted

"The technician that did the service, let me know specifically one thing that turned not to be possible. I would never known, because the issue was below the ground. He also gave me post sales advice to recommend to my A/C who would be installing a unit near the repair."
Response time1 day
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Woods Basement Systems, Inc.
Woods Basement Systems, Inc.
4.5(
6
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Alton, IL and surrounding areas

Approved

In business since 1986

Free estimates

Warranties offered

We are a locally owned and family operated company that ensures each homeowner has a remarkable experience with their home improvement project. Our services are customized to the individual project, paying close attention to the details of each project that we're trusted to complete. We pride ourselves on having the best people and best products in our industry. Because of the quality of our work as well as our commitment to outstanding results we are the highest rated most reviewed "ALL THNNGS BASEMENTY!" contractor. We look forward to building lasting relationships and sustaining the peace of mind homeowners desire that restores the value of their homes.\nFully & Insured!\nTo speak with our appointment center specialists call (314) 965 - 1980 or\n(618) 344- 2288, thank you for considering Woods.

Corner From Sump
Before Photo
Dual Pump Station
Large Basement
Work Around

+20

147 neighbors recently requested a quote
...
Showing 1-10 of 74
Basement Waterproofing FAQs, answered by experts

Generally, moisture barrier padding costs $0.75 to $1.50 per square foot, varying by brand and mix. That’s a lot more than standard padding, which runs $0.25 to $0.90 per square foot. The price difference between these two options might seem steep, but think of it as insurance against future carpet replacement costs and subfloor damage. If you have pets or kids, that extra investment in high-risk areas like your living room often pays off.

Whether your homeowners insurance covers slab leak repairs depends on your specific policy and the cause of the leak. Many policies cover slab leaks resulting from a covered peril, such as a natural disaster, a falling tree, or pipes freezing and bursting within the slab. However, damage caused by invading tree roots, corrosion, or leaks from appliances may not be covered by a standard policy. It's a good idea to also check your home warranty plan for potential coverage if an appliance is the source. Contact your insurance provider for a full explanation of what your policy covers.

A sump pump can remove excess moisture from under a house if standing water is present. Other ways to protect your crawl space from moisture include installing a vapor barrier, using a dehumidifier, installing insulation, and using a fan to dry the space. Finally, keeping your gutters clear of debris and positioning your downspouts away from the home’s foundation can prevent moisture from getting into the crawl space in the first place.

If you set up a dehumidifier, it will usually dry out your wet crawl space within 12 to 24 hours. Once the space is dry, it’s a good idea to take preventative measures to keep it dry. These include installing a French drain or other exterior foundation drainage system, installing a sump pump in the crawl space, and installing a vapor barrier in addition to leaving the dehumidifier running.

Whether to waterproof your basement from the interior or exterior depends on several factors, including your budget.

Exterior waterproofing is generally considered the superior method because it stops water at the source, preventing it from seeping into and damaging your basement walls. This approach offers the most protection, making it ideal if you use your basement for storage.

By contrast, interior waterproofing is often less expensive and requires less labor because the area is more accessible.

For maximum protection against water leakage and moisture, applying waterproofing measures to both the inside and outside is the best solution. However, if you must choose only one, stopping water from the outside is the most effective approach to preserve your foundation and prevent damage.

The Alton, IL homeowners’ guide to basement waterproofing services

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