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Avatar for Connecticut Basement Systems, Inc.
Connecticut Basement Systems, Inc.
4.3(
397
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationFoundation Drainage - Install or ReplaceConcrete Foundation - Repair+1 more

Serving Willimantic, CT and surrounding areas

Approved

In business since 1987

Free estimates

Warranties offered

"I posted an initial review on 2/21/19 on a job done on 1/11/19 to fix groundwater from coming into our basement. The drainage system and sump they installed was not collecting all the water that was coming in, as we had leaking from several areas along an uneven rock ledge. I had reached out to our salesperson by phone and email and never heard back, so I was very frustrated. About 3 weeks after I posted the review, I did get a call from Jeff Allen, one of the supervisors. To make a long story short, he sent out one of their waterproofing specialists to look at the problem. We had already hired an independent mason to try to remedy the problem but he had not yet had a chance to do the job. Jeff convinced me that CT Basement systems would do absolutely whatever it took to fix my water problem. I cancelled the independent mason. Danny, a mason from CT Basement Systems came out and used a very ingenious method to divert all the water to the originally installed water guard trough and then to the sump. It is working beautifully!! I think Danny is a genius and I am so impressed and thankful for Jeff's perseverance and kindness in making this happen. I am now a very happy customer."
Additional Photos
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Additional Photos

+12

51 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Groundworks
Groundworks
5.0(
12
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationFoundation Drainage - Install or ReplaceConcrete Foundation - Raise+2 more

Serving Willimantic, CT and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2025

Free estimates

Warranties offered

Groundworks is the North America's leading and fastest-growing foundation repair and water management solutions provider. Groundworks is a vertically integrated company with its own manufacturing operations and a world-class software solution, allowing us to serve our customers more effectively. From the first phone call to the annual maintenance offered, our customers have peace of mind knowing we're there with one mission to repair, protect and improve their home. For state licenses visit Groundworks.com/licensing

Foundation
Foundation
Foundation
Concrete
Concrete

+16

594 neighbors recently requested a quote
Avatar for CGV & K Masonry, LLC
CGV & K Masonry, LLC
4.7(
177
)
Concrete Foundation - Repair

Serving Willimantic, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Free estimates

Small jobs welcome

"We are very happy with our new patio area for our full basement walkout. The owner Claudin is a true professional who clearly is concerned about client satisfaction. We are very satisfied with services rendered and highly recommend CGV & K Masonry."
Stone Wall
Kitchen Renovation
Pavers for Installation
Kitchen Renovation Complete
Pavers for Installation

+74

Response time12 hrs
176 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for American Dry Basement Systems, LLC
American Dry Basement Systems, LLC
4.9(
118
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Willimantic, CT and surrounding areas

Approved

In business since 1997

Free estimates

Credit card accepted

"So happy I shopped around before finding American Dry Basement Systems. Not only were they affordable, but were extremely knowledgeable and helped me make an informed decision about the integrity of my home's foundation."
Drainage Trench
Jackhammer
Mixing SuperCrete
Compress Wash Stones
Spreading SuperCrete

+7

Response time11 hrs
9 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for ANDI'S SMART RENOVATIONS INC
ANDI'S SMART RENOVATIONS INC
5.0(
56
)
Concrete Foundation - Repair

Serving Willimantic, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Emergency services offered

"These guys are true and remarkable professionals. Their attention to detail and going above and beyond is exemplary. Their pricing is extremely fair and on point I had them repair my garage door thresholds after replacing my asphalt driveway and I also had them repair four cracks in the foundation and repair my front cement steps and you would never know that there was ever an issue anywhere throughout the project I highly recommend these guys for any renovation project you may have. They are great with suggestions and how to make your project even better. They are remarkable individuals. I can’t thank them enough for the job that they did. INCREDIBLE WORK"
Prepping Roof for Installation
Completed Roof Installation
New Roof Fully Installed
Prepping Roof for Installation
Completed Roof Installation

+43

Response time8 hrs
Response rate94%
7 neighbors recently requested a quote
Avatar for Budget Dry Waterproofing, Inc.
Budget Dry Waterproofing, Inc.
4.4(
240
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationFoundation Drainage - Install or ReplaceConcrete Foundation - Repair+1 more

Serving Willimantic, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"Very professional and fixed the cracks in the garage the best that I can tell. Expensive fix but well worth going with the carbon fiber, you get a 15 year transferable warranty with it. Only deducted half star because they didn't show up on a modified scheduled date."
Drain at base of bilco
going up on the wall
finished wall area
completed
finished sump pump area

+37

Response time1 day
151 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Eastern Waterproofing Co., Inc.
Eastern Waterproofing Co., Inc.
4.6(
40
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Willimantic, CT and surrounding areas

Approved

In business since 1976

Free estimates

Warranties offered

"Jon is professional and a man of his word. My wife and I had some leakage in our finished basement. After substantial research, I contacted several companies in the area. Jon and his crew at Eastern responded faster than every other company and offered us the best price for the least hassle. The crew works hard and fast. They were respectful of our home and property and cleaned up after themselves when they were done working. Our interior foundation drain is working great and can sleep in peace knowing that our basement is dry, even on the wettest nights.They stand by their work and even came out to install a false floor under our oil tank after we replaced it., at no additional fee. I would 100% recommend Jon and his crew for all of your waterproofing needs."
broken walk
repai
repair
addition
sidewalk and dumpster pad

+67

Response time2 days
24 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Advanced Basement Waterproofing LLC
Advanced Basement Waterproofing LLC
5.0(
5
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationFoundation Drainage - Install or Replace

Serving Willimantic, CT and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs.\nIt is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project.\nIn order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer \nin a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Knell walls
Knee Walls
After
Before
Concrete Work

+1

285 neighbors recently requested a quote
Avatar for Jade Construction
Jade Construction
4.4(
45
)
Foundation Drainage - Install or Replace

Serving Willimantic, CT and surrounding areas

Approved

In business since 2004

Free estimates

Credit card accepted

"After spending a year trying to get someone to remove a pile of dirt from our yard we found Jason at Jade Construction! Let me preface this by saying we had 3 out of about 20 contractors actually contact us and say they would give us a quote but never actually did and just completely ignored us. Jason not only has fair prices, kept in contact and provided a quote when he said he would, he also showed up on time and did the work at the quoted price! Highly recommend Jade Construction!"
Septic Install
Septic Install
Foundation
Footing drains
Septic Install

+131

Response time5 hrs
Response rate94%
8 neighbors recently requested a quote
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Showing 1-10 of 89
Foundation Repair questions, answered by experts

You can seal a concrete slab by cleaning the surface, filling in any cracks, etching the surface, applying a sealer, and letting it dry. Concrete slabs don't typically need sealing, but you can use a topical concrete sealer if you notice signs of water damage. If you haven't already fixed the cause of the leak, then you'll want to repair the plumbing before you seal a concrete slab.

Violating building codes can lead to a number of consequences, including fines, citations, and even being required to demolish the structure and start over. If your house isn’t compliant with code requirements, you can also run into trouble when it comes time to get homeowners insurance or sell your house. Following all applicable building codes will avert costly consequences.

Yes, foundation problems can cause ceilings to collapse or even your whole house to crumble. Left unaddressed, natural sinking can build up and eventually harm your home’s supporting structure, such as walls, beams, and frames. Your basement ceiling may be the first place to look for signs of a ceiling collapse caused by foundation problems.

Crumbling concrete steps will affect your ability to drill into the material and affix a sturdy railing. If the damage is primarily cosmetic, you might be able to DIY the repair with a patch kit. If the concrete is badly crumbling, hire a professional who specializes in pouring concrete. The average concrete step repair cost is $500 from a professional, but the extent of the damage will determine your actual cost. The professional may recommend a replacement if the damage is extensive.

Yes, it’s worth it to repair a crawl space foundation, even if the issue seems relatively minor. Foundation problems often get worse and more expensive to fix if you leave them untreated. Additionally, your entire home, from the framing and flooring to the roof system, relies on the foundation for even and level support. Issues with your foundation will almost always manifest as problems in and above your living space, so it’s important to find a solution.

The Willimantic, CT homeowners’ guide to foundation repairs

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