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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 - Raise+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
Additional Photos

+12

61 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Groundworks
Groundworks
4.9(
13
)
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

624 neighbors recently requested a quote
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(
58
)
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 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
22 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

300 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%
6 neighbors recently requested a quote
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Foundation Repair questions, answered by experts

If your concrete steps have crumbled or chipped, you can fix them by removing any chips or flakes, cleaning and wetting the affected area, applying a concrete bonding agent, and finally applying new concrete, usually in the form of Portland cement. For widespread damage, you can consider concrete resurfacing instead. For fixing concrete spalling that has led to deep damage, you might need to remove damaged material, add structural supports, and pour new concrete into a mold.

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.

A slab-on-grade or slab foundation is a great option in many areas—usually in warm or moderate climates—and has been a successful foundation style for many decades. Slab foundations don’t require excavation or concrete block wall construction, so they’re the least expensive foundation type. They’re also the fastest to construct and don’t have many issues with moisture or water intrusion. However, they don’t give you extra storage space or potential living space like a crawl space or basement would, and they’re not ideal in colder areas where utility lines can freeze and frost heave can cause major damage.

Most of the time, normal foundation settling will present as thin cracks in the foundation and minor creaks in the floorboards. In contrast, you can identify foundation issues by wide or uneven foundation cracks, horizontal or step-shaped gaps on the foundation wall, or cracks that go around corners of your foundation. Foundation problems can also cause changes in your living area, like increased humidity, uneven or sloping floors, nail pops in drywall, countertops pulling away from the wall, and windows and doors getting stuck. When in doubt, call in a professional to identify the underlying cause.

Most building departments will require that a certified and licensed foundation repair professional or a structural engineer pull permits for foundation repair, so homeowners usually cannot pull them themselves. This helps ensure that an experienced professional completes all structural work on your home. Minor repairs that are technically DIYable often won’t require permits, but it’s still a good idea to hire a professional to carry out foundation repairs.

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.