Get matched with top basement waterproofing pros in Merced, CA

Q: When should you not finish a basement?

• <div><p>Basements with persistent moisture problems or flooding shouldn&rsquo;t be finished until the moisture issues have been fixed. In addition, if your foundation is cracked, you have unmitigated radon levels, or you have asbestos or lead pipes, remediate the underlying problem before finishing your basement. Turning a basement into living space before fixing these issues can lead to serious health risks or structural damage. </p></div>

Q: Can I add a sump pump to an existing basement?

• <div><p>A sump pump can be added to an existing basement. To do this, you will need to use a jackhammer or sledgehammer to break up the concrete and dig a pit. You will also need to create a hole in your basement wall to run the discharge pipe through.</p></div>

Q: What methods are used for waterproofing basements or crawlspaces?

• <div><p>Methods include interior sealants, exterior excavation and waterproofing membranes, sump pump installation, and vapor barriers for encapsulation. Techniques vary based on the structure and severity of moisture issues.</p></div>

Q: How do I maintain a raised foundation?

• <div><p>Regular inspections, proper drainage management, and ensuring soil stability help prevent future settlement issues.</p></div>

Q: Does a basement need ventilation to reduce humidity?

• <div><p>Proper basement ventilation is very effective at reducing humidity. Without enough ventilation, your basement is prone to mold and moisture damage. Your basement should have as much natural ventilation via windows and doors as possible, and if your budget allows, you should also consider installing an ERV system to keep basement humidity levels at bay.</p></div>

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Verified Reviews for Basement Waterproofing pros in Merced, CA

*The Angi rating for Basement Waterproofing companies in Merced, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

*The HomeAdvisor rating for Basement Waterproofing companies in Merced, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

Last update on November 07, 2025

Reviewed in November 2025
Had sprinklers installed for trees in my backyard. Work was quick and very professional. He was very nice and did the work exactly how I described. His work exceeds expectations! I highly recommend!
K & K Landscape Services Inc.
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Reviewed in May 2025
William was amazing!!! He fixed some plumbing issues I had and fixed a wall and painted it. He also cleared out a shed for me and fixed a door, he did many other things I needed done. Definitely hire him for the job!
William Dobson - Unlicensed Contractor
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Reviewed in September 2024
Thrilled with the results. Home is 35 years old and had some water damage in rear. The repairs are absolutely invisible. They matched the siding and replaced one back wall. Honestly called to tell me the insulation was perfect and would not need to be replaced. Job finished in less time than...
Crafted Handyman Services
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Reviewed in April 2024
They did an awesome job. All my concrete work for building my house was done by them. From foundation, patios, and driveways, they will get the job done
XS CONCRETE INC
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Reviewed in February 2024
We had a new pool, put in with a lot of cement decking, and a waterfall and quartz, but in the surface of the pool
El Dorado Pool & Spa
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Reviewed in January 2024
The work was amazing. not only they did it on time they were early for the amount of concrete three truckloads. It was done in five hours. That was awesome. They knocked it out. Got it done and I provide lunch for them because they did an amazing job. The job turned out great I would recommend...
DT CONCRETE
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Reviewed in June 2023
Service was amazing, replaced drywall that had water damage
Mr. Fixer Handyman services
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Reviewed in August 2022
No hesitation in recommending this business-great service, very helpful and professional. This was an emergency install during the time the weather was over 104. So grateful to this business for helping me out and not taking advantage of me! Highly recommend. You do not find service providers...
The Air Doctor Heating & Air
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Reviewed in May 2022
This is without a doubt the very best customer service ever. We called them when we had no water and they sent someone over the same day. The next day Dave was here at 7:30 am and had us up and running within 4 hours. We were out of water less than 24 hours. The installer, Dave, upgraded...
Pump 'N Water, Inc.
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Reviewed in February 2022
We had our juilet Porch repaired due to years of water damage. Both workers, Gary and Joe were extremely knowledgeable, professional job and very personable. We willbe calling them for future work. The cost for ther service was a fair, exellent value. They were on time and cleaned up before...
Mr. Handyman of Johnson City
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Find Basement waterproofing pros in Merced

Groundworks

3.1(

)

Serving Merced, CA and surrounding areas

Approved (Corporate)

In business since 2023

Free estimates

Warranties offered

"Groundwork’s did an amazing job. Our home was settling and they were able to lift it. The process was quick and all employees from sales to crew were all very professional."

+16

105 neighbors recently requested a quote

Recommended by12%of homeowners

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Palm Construction, Inc.

5.0(

112

)

Serving Merced, CA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

"Very professional. Completed the job in two weeks. The deliverables were as promised. They were very independent, requiring only minimal involvement from the client. However, communication with the owner could be enhanced a bit."

Recommended by100%of homeowners

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Hampton Enterprise LLC

3.7(

)

Serving Merced, CA and surrounding areas

In business since 1989

Free estimates

Emergency services offered

"I only use James when I need some work done to my house. He responds fast, gets the work done quicker than just about anyone else I've ever used and seems very concerned with leaving his customers happy."

Recommended by60%of homeowners

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A.K.I.I.

New to Angi

Serving Merced, CA and surrounding areas

In business since 2003

Free estimates

K.T.W. Land Development provides local area consumers with superior quality land development and construction services. With years of experience in the industry, you can be sure your project will be handled promptly and professionally. Call K.T.W. Land Development today to schedule an appointment for your project estimate!

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Basement Waterproofing questions, answered by experts

Basements with persistent moisture problems or flooding shouldn’t be finished until the moisture issues have been fixed. In addition, if your foundation is cracked, you have unmitigated radon levels, or you have asbestos or lead pipes, remediate the underlying problem before finishing your basement. Turning a basement into living space before fixing these issues can lead to serious health risks or structural damage.

A sump pump can be added to an existing basement. To do this, you will need to use a jackhammer or sledgehammer to break up the concrete and dig a pit. You will also need to create a hole in your basement wall to run the discharge pipe through.

Methods include interior sealants, exterior excavation and waterproofing membranes, sump pump installation, and vapor barriers for encapsulation. Techniques vary based on the structure and severity of moisture issues.

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

Proper basement ventilation is very effective at reducing humidity. Without enough ventilation, your basement is prone to mold and moisture damage. Your basement should have as much natural ventilation via windows and doors as possible, and if your budget allows, you should also consider installing an ERV system to keep basement humidity levels at bay.

The Merced, CA homeowners’ guide to basement waterproofing services

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

See all articles

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•
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•
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Groundwater In Your Basement Isn’t Good. Here's What You Need to Know
Ever wonder how much groundwater contributes to water problems in your basement? Stay in the know by understanding the cause and effects of groundwater issues.