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Avatar for Connecticut Basement Systems, Inc.
Connecticut Basement Systems, Inc.
4.3(
397
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationConcrete Foundation - RepairConcrete Foundation - Raise+1 more

Serving Windham, 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

28 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 Windham, 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

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

Serving Windham, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Free estimates

Small jobs welcome

"Claudino was very easy to work with. He finished my patio and did repairs to my front steps quicker than I thought. He kept me informed and he and his workers were always professional. We are very happy how things worked out."
Stone Wall
Kitchen Renovation
Pavers for Installation
Kitchen Renovation Complete
Pavers for Installation

+74

Response time12 hrs
169 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 Windham, 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
7 neighbors recently requested a quote
Recommended by66%of homeowners
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 Windham, 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
142 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 Windham, 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 Windham, 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

233 neighbors recently requested a quote
Avatar for Canuto Conn-Crete, LLC
Canuto Conn-Crete, LLC
4.8(
11
)
Poured Concrete Wall - Repair

Serving Windham, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Credit card accepted

"Elson and company did a great job replacing a garage apron and old patio block sidewalk. He was always prompt from the estimate to the final inspection. He kept in touch with me on his work schedule, even when he had to bump out the start date due to the weather. He kept to his word and quote. I'd hire him again without question."
Response time6 hrs
Response rate99%
10 neighbors recently requested a quote
Avatar for New London Home Improvements LLC
New London Home Improvements LLC
5.0(
2
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Windham, CT and surrounding areas

Approved

Free estimates

Warranties offered

Small jobs welcome

"We had a leak in our foundation that flooded our finished basement newlondonhomeimprovements came to our property and took a look at what we had going on. They did there inspection and found a solution for the issue. They came out dug the out side of the foundation found the issues with our foundation and then sealed our foundation with a drainage system Now our basement is completely dry thanks again newlondonhomeimprovements"
5 neighbors recently requested a quote
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Showing 1-10 of 87
Foundation Repair questions, answered by experts

Regular inspections, proper drainage management, and ensuring soil stability help prevent future settlement issues.

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.

Concrete can crack from general wear, improper installation, or in response to uneven support from the soil underneath. Small, thin cracks on the surface of aging concrete are usually a result of normal wear and tear, while cracks on new concrete more likely indicate a problem with installation. Larger cracks or uneven steps can signify a much more severe issue. A concrete contractor should be able to diagnose the cause and repair concrete cracks for you.

Foundation settling is normal and expected if just a small amount of settlement occurs within a year or so after construction. This usually results in hairline cracks in the foundation, which aren’t typically a problem. If settlement occurs years after construction, unevenly under your home, or results in signs of structural damage, then it could be very serious. Foundation stabilization and drainage system installation to fix unnatural settlement can cost tens of thousands of dollars and compromise the structural integrity of your entire home.

The most cost-effective foundation repair is using masonry patches and sealants to seal foundation cracks and offer some support to prevent further damage. These methods are used to fix minor foundation cracks quickly. However, they’re not suitable as a long-term solution, and they only offer minimal stability. On average, masonry patches and sealants cost $500, but a sealant like an epoxy crack injection can total over $2,000. If you’re handy and only looking for a temporary solution until you contact a local foundation repair contractor for a more permanent one, you can save hundreds by DIYing this repair.

The Windham, CT homeowners’ guide to foundation repairs

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