Lena Riveradownpours and the region’s notoriously shifty clay soil, protecting a property requires serious intervention.
Finding the best waterproofing in San Antonio means looking for specialists who understand these exact environmental challenges. A reliable contractor can save you from catastrophic foundation damage, mold growth, and endless structural headaches.
I have looked closely at the top local companies to see who truly delivers on their promises. Below is a detailed breakdown of the premier services available for homeowners and property managers alike.
How much does waterproofing cost in San Antonio?
Comprehensive exterior waterproofing solutions in San Antonio cost $8,000 to $15,000, while minor interior sealing projects cost $500 to $1,000.
| Service Type | Average Cost |
| Minor Interior Sealing | $500 – $1,000 |
| Comprehensive Exterior Solutions | $8,000 – $15,000+ |
| Basement Waterproofing | $13,892 |
1. Alpha Insulation & Waterproofing
Website: https://www.alphaiwp.com/
Address: 13644 Toepperwein Rd, Suite 101
Contact: +1 210 599-3333
Hours: Monday – Friday: 8 AM – 6 PM
Securing a massive commercial property against the elements requires a contractor capable of handling complex scopes of work.
Alpha Insulation & Waterproofing stands out by offering a diverse range of Division 7 (Thermal and Moisture Protection) services under one roof. This setup allows general builders and renovation contractors to streamline their vendor coordination.
To ensure meticulous execution, they enforce a strict superintendent-to-field employee ratio of one to ten.
A friend actually collaborated with their team on a large warehouse project last year, and their reliable on-site oversight kept the timeline completely intact.
Plus, their specialized technicians bring decades of regional experience to every job site.
However, their services are tailored exclusively for industrial clients. A standard homeowner looking to fix a leaky foundation will have to look elsewhere.
Their services also explicitly exclude roofing, requiring you to hire a separate vendor for the top of the building envelope.
2. Groundworks
Website: https://www.groundworks.com/locations/groundworks-san-antonio/groundworks-san-antonio-branch/
Address: 18630 Goll St
Contact: +1 210-941-1606
Hours:
- Monday – Friday: 6 AM – 10 PM
- Saturday: 7 AM – 10 PM
- Sunday: 9 AM – 10 PM
Protecting a home’s foundation from moisture takes the right materials and know-how. Groundworks handles this with custom-designed systems, such as galvanized steel hardware and polyurethane foam injections, to stabilize foundations for the long term.
The company started locally as Foundation Support Specialists (FSS) before joining a national water management network. That means they combine deep South Texas soil knowledge with resources and research from a larger network.
Their certified field inspectors are thorough and professional, taking the time to assess problems without pressuring you into a sale.
I also liked that they offer financing options, making these often-expensive structural repairs a bit more manageable.
This is especially helpful since their quotes tend to be high due to their reliance on patented materials and specialized crews.
And since they serve a lot of customers across the metro area, it can sometimes take a while before they can start a project.
Customer Reviews:
I am happy with the results
A person’s home is their safest space & I was nervous about having this work done. What a pleasant surprise! Elyas V., the team leader was very friendly & communicated his coming & going walking me through many steps. His team of David L. & Gabriel S. , were also very courteous and paid attention to their work, detail, and were supportive. Everything was very professional and I was totally happy with the outcome. My home feels & looks healthier and I am happy with the results. Thank you, Groundworks!
- Noel Rodriguez | Google Review
Groundworks installation crew did an amazing job!
Groundworks installation crew did an amazing job! Hard-working customer service focused and easy to interact with. As homeowner, I appreciated their desire to educate and engage us in every stage of the process, and the finished product is impressive! Even more, the finished worksite looked as good or better than before they started the project!
Thank you for the security that your life time warranty brings along with the enjoyable opportunity to work with a great group of guys!
- Billy Moore | Google Review
3. Olshan Foundation Repair
Website: https://www.olshanfoundation.com/regions/texas/sanantonio/
Address: 1720 SE Loop 410 Acc Rd
Contact: +1 210-495-5758
Hours:
- Monday – Friday: 8 AM–8 PM
- Saturday: 8 AM–5 PM
Severe structural moisture issues need root-cause solutions, not just a quick leak patch. Olshan Foundation Repair tackles this with systems that work together, like exterior drainage and crawl space encapsulation.
They use an exclusive Cable Lock ST Plus system that combines the deep-penetrating strength of steel with the durability of concrete pilings. This kind of engineering is especially reliable for homes built on expansive clay soils.
With over 90 years in the business, they clearly have the experience to back up their industry-leading warranties. They also offer free structural assessments, carried out by their own certified technicians.
Keep in mind, though, that their comprehensive encapsulation solutions are a serious financial commitment. Their specialized approach is expensive, so it’s not the best fit if you’re just looking for a quick fix.
Customer Reviews:
They were friendly and professional
Patrick, Freddy and Joseph were awsome! They were friendly and professional. During the initial consult we had they weren’t sure if they would be able to raise the sidewalk as high as it use to be, but they did it! This was a major thing for us since my husband uses a cane. I would definitely recommend them.
- Patti Howes | Google Review
4. Quality Caulking and Coating LLC
Website: https://www.qualitycaulkingandcoating.com/
Address: 5420 Schertz Rd
Contact: +1 210-290-3449
Hours: Monday – Friday: 7 AM–5 PM
Meeting vendor diversity requirements on big commercial projects can be tricky for property managers. Quality Caulking and Coating LLC makes it a bit easier.
They’re an officially certified Woman-Owned Small Business (WOSB) and also hold a Texas Historically Underutilized Business (HUB) certification.
This family-operated company, managed by the Kelley family, focuses on specialized exterior restoration rather than general construction.
When I consulted them about sealing an older office facade before installing a solar panel array, their expertise in wet glazing was immediately clear.
They also back their work with a firm quality guarantee and provide comprehensive project management right from the initial free estimate.
One thing to keep in mind is that they don’t offer around-the-clock emergency leak repair services. This could be a drawback if you encounter severe, sudden moisture intrusion after business hours.
5. CJ House Leveling, Inc.
Website: https://www.cjhouseleveling.com/
Address: 154 Vassar Ln
Contact: +1 210-734-9865
Hours: Available 24 Hours
When a foundation starts shifting, you need a professional who can respond immediately. CJ House Leveling is available 24/7 for urgent structural emergencies, which is a huge relief if a problem can’t wait.
Founded in 1991 by Jesus Cuellar, the company takes a very hands-on approach. Cuellar personally inspects homes and communicates directly with clients, so you don’t have to deal with call centers or salespeople pushing unnecessary upgrades.
Their crews use specialized tunneling techniques to access plumbing under the slab without damaging your floors. They also manage exterior drainage and install root barriers to keep moisture away from your home.
That said, their strength is clearly in structural leveling. While they do handle moisture issues, it’s usually as part of a larger foundation repair project.
If you’re looking for standalone interior moisture solutions, like specialized sump pump installations, they might not be the perfect fit.
Customer Reviews:
I am very pleased with the service
I am very pleased with the service Jesus and his team provided. He was very responsive, easy going, and very accommodating. The crews worked hard and finished the job quickly. Pricing was better than the competitors too.
- Alex Khabbaz | Google Review
They did an amazing job
I was a little nervous looking for a company to lift my house. I went through 3 company’s before I found CJ house leveling. After meeting with Jesus he was very professional… knowledgeable about his craft. I was impressed. So I hired the company. The end result was more then I expected. They did an amazing job. The crew was very friendly and professional and good at their craft. I highly recommend this company.
- nancy alvarado | Google Review
