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Verified Reviews for Basement Waterproofing pros in Thermal, CA

*The Angi rating for Basement Waterproofing companies in Thermal, 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 Thermal, 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 22, 2025

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Avatar for Los Angeles Retrofit & Construction Inc

Los Angeles Retrofit & Construction Inc

5.00(
6
)

Los Angeles Retrofit & Construction Inc

5.00(
6
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We believe our retrofit, remodeling and construction services will give you the best outcome and give you the most value from your property investment. When you work with LARC, you work with the principles of the company from start to finish. Whether you are a concerned home owner, potential home buyer or just want to ask us few questions about your foundation, LARC can help.

We believe our retrofit, remodeling and construction services will give you the best outcome and give you the most value from your property investment. When you work with LARC, you work with the principles of the company from start to finish. Whether you are a concerned home owner, potential home buyer or just want to ask us few questions about your foundation, LARC can help.

Avatar for C & L Construction

C & L Construction

4.83(
23
)

C & L Construction

4.83(
23
)
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers

Home Improvement company. We do kitchens, bathrooms, roofing, painting, windows, new construction, and much more!

"I am so glad I found C &L Construction for my remodel ! The team was always on time , responsive , and worked in the timeline they promised ! I had a complete remodel done for a single family home and their work was flawless!!!"

Ani B on August 2019

Home Improvement company. We do kitchens, bathrooms, roofing, painting, windows, new construction, and much more!

"I am so glad I found C &L Construction for my remodel ! The team was always on time , responsive , and worked in the timeline they promised ! I had a complete remodel done for a single family home and their work was flawless!!!"

Ani B on August 2019

Paramount Remodeling

No reviews yet

Paramount Remodeling

No reviews yet
34 years of experience

Paramount Remodeling provides outstanding services for every project. We are a full service general contractor and focus on providing outstanding service to our clients. We provide the highest professional standards in every project!

Paramount Remodeling provides outstanding services for every project. We are a full service general contractor and focus on providing outstanding service to our clients. We provide the highest professional standards in every project!

Pirate Pilots Construction Company

No reviews yet

Pirate Pilots Construction Company

No reviews yet
9 years of experience

To introduce myself and to let you know of my interest in becoming a part of your remolding Ideas. I assure you that I can successfully fulfill any obligations requiring of any responsibility that you give our company. I have performed my assignments with a high degree of skill and professionalism. Pirate Pilots Construction Company cuts out the Double charging on materials and saves you lots of money. We at "PPCC" Will only charge the LABOR.

To introduce myself and to let you know of my interest in becoming a part of your remolding Ideas. I assure you that I can successfully fulfill any obligations requiring of any responsibility that you give our company. I have performed my assignments with a high degree of skill and professionalism. Pirate Pilots Construction Company cuts out the Double charging on materials and saves you lots of money. We at "PPCC" Will only charge the LABOR.

Avatar for S Visions Construction Inc

S Visions Construction Inc

No reviews yet

S Visions Construction Inc

No reviews yet
21 years of experience

S Visions Construction Inc. specializes in producing creative, functional, and stunning custom designs. We want to bring your idea to fruition, and no job is too big or too small. Let us help you with all your construction needs.

S Visions Construction Inc. specializes in producing creative, functional, and stunning custom designs. We want to bring your idea to fruition, and no job is too big or too small. Let us help you with all your construction needs.

Sherman's Plumbing and Constuction

No reviews yet

Sherman's Plumbing and Constuction

No reviews yet
35 years of experience

Sherman's Plumbing and construction has been servicing the Inland Empire and Orange County for over 25 years. Currently operating 4 service trucks for quick resolutions to your home problems. We offer quality service with unbeatable prices. There are no jobs too big or small for Sherman's Plumbing. Call Sherman's today for a FREE assessment.

Sherman's Plumbing and construction has been servicing the Inland Empire and Orange County for over 25 years. Currently operating 4 service trucks for quick resolutions to your home problems. We offer quality service with unbeatable prices. There are no jobs too big or small for Sherman's Plumbing. Call Sherman's today for a FREE assessment.

Avatar for Built Strong Construction

Built Strong Construction

5.00(
22
)

Built Strong Construction

5.00(
22
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Built Strong Foundation Repair is a leading foundation repair company with locations in Los Angeles and Orange County. We service the majority of Southern California. We specialize in services such as foundation repair, foundation replacement, structural engineering, house leveling, earthquake retrofitting, house underpinning, caisson work, slab foundation repair, foundation crack repair and many more services to save your home. Foundation Repair Specialists.

"We had our home earthquake bolted. The work was completed in 1 day!! They did a fantastic job and the city inspector complimented on they’re workmanship! Thank you built strong!"

Garry D on March 2018

Built Strong Foundation Repair is a leading foundation repair company with locations in Los Angeles and Orange County. We service the majority of Southern California. We specialize in services such as foundation repair, foundation replacement, structural engineering, house leveling, earthquake retrofitting, house underpinning, caisson work, slab foundation repair, foundation crack repair and many more services to save your home. Foundation Repair Specialists.

"We had our home earthquake bolted. The work was completed in 1 day!! They did a fantastic job and the city inspector complimented on they’re workmanship! Thank you built strong!"

Garry D on March 2018

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Basement Waterproofing questions, answered by experts

If a crawl space isn’t vented, there can be moisture buildup, which can lead to mold damage, easily destroying the foundation of your home. A closed-off crawl space can trap heat, which can be useful in the winter, but can also trap dangerous gases and prevent clean air from entering the home through the floorboards.

“Basement waterproofing” sometimes refers to applying a waterproof sealant to basement walls, in which case you would use a waterproof paint, often made of latex. However, there are many methods you can use to waterproof a basement, including exterior drainage systems, interior drainage systems, dehumidifiers, and more. As such, the materials you use can vary depending on the methods you use.

When doing any type of project involving mold, it's important to wear the right protective gear. You'll want an N-95 or KN-95 mask to keep yourself from inhaling mold spores, which can be irritating or trigger an allergic reaction in people with weakened immune systems. You'll also want to wear protective eyewear and gloves to limit your contact with mold.

Some disadvantages of crawl spaces are mostly regarding the air itself—moisture build-up and poor ventilation, which can cause problems both in the house and underneath it, even damaging the foundation itself. Crawl spaces are difficult to access and often invite unwanted pests during the hot summer months and the cold winter ones. These hard-to-seal spaces are also susceptible to water damage during periods of heavy rain or melting snow.

Flooded basement cleanup can take anywhere from a few days to several weeks, depending on the extent of water damage, the type of water involved, and the need for repairs or mold remediation. Severe cases with structural damage or extensive mold may require longer timelines. Quick action and professional help can speed up the process and reduce overall damage.

The Thermal, CA homeowners’ guide to basement waterproofing services

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

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