Top-rated basement waterproofing pros.

Best basement waterproofing pros near Rossmoor, CA

Enter your zip and get matched with up to 5 pros

Top-Rated Basement waterproofing pros in Rossmoor - Updated Nov 2026

Avatar for Alpha Structural, Inc.
Alpha Structural, Inc.
4.6(
241
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Rossmoor, CA and surrounding areas

Approved (Corporate)

In business since 1992

Free estimates

Emergency services offered

"Erinn was my initial contact and he gave a very through and fair estimate. We had structural work done to support floor joists and large beams under the garage that needed replacing. Ernesto and his team, Julio, Salvatore and Gilder worked tirelessly to complete the work and were respectful, punctual, informative and good humoured throughout the entire process. I would not hesitate to use them again or recommend them to others. A really great company!!"
Basement Addition
Basement Expansion
Caisson Supported Retaining Wall
Cantilevered Deck Design Build
Deck Expansion and Slope Failure with Retaining Wall

+323

Response time10 hrs
Response rate100%
11 neighbors recently requested a quote
RSF Construction Inc.
1.0(
1
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Rossmoor, CA and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

RSF Construction Inc. is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

Palm Construction, Inc.
5.0(
112
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Rossmoor, CA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

It can be a daunting task looking for not only the right contractor for your job but also the right contractor for you. We completely understand what you're going through. We know every customer has different desires, different needs and different schedules. We're not only here to turn your ideas into reality but to make it a memorable experience every step of the way. Call us right now, no matter where you are in the planning process.

Recommended by100%of homeowners
Palm Construction, Inc.
5.0(
90
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Rossmoor, CA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

"We worked with Ali (sales manager) and Tony (project manager), who took the time to design a project that made sense for our property and our budget, made a number of suggestions and recommendations and were never pushy or tried to "sell" us on something. The crew really went above and beyond to provide top quality workmanship and overall we were in very good hands. Highly recommended!"
Recommended by100%of homeowners
Tom's Environmental Care
4.9(
118
)
Basement Drainage Channels - Install

Serving Rossmoor, CA and surrounding areas

In business since 1975

Free estimates

Emergency services offered

"I think that Tom and his workers did an excellent job on our installation. They knew exactly what our particular problems were, and installed a superb system for us. I couldn't be happier and would recommend Tom's Environmental Care as a first choice for anyone needing sprinkler systems."
Recommended by99%of homeowners
Avatar for OM Construction Inc
OM Construction Inc
4.7(
151
)
Basement Drainage Channels - Install

Serving Rossmoor, CA and surrounding areas

In business since 1990

Free estimates

Emergency services offered

"Perfect!!! We originally d to repaint the whole house. Since that was out of our budget, we asked Tony to touch up our walls. When he finished, it looked like we had brand-new walls!!! Although it's the same beige color we already had, they look spectacular!!! He did the whole house in about 6hrs."
Roofing Project
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+86

Recommended by95%of homeowners
Avatar for Your City Rooter and Plumbing
Your City Rooter and Plumbing
4.8(
28
)
Basement Drainage Channels - Install

Serving Rossmoor, CA and surrounding areas

In business since 2022

Emergency services offered

Warranties offered

"Jake and his team were terrific to work with! From careful diagnosis of our problem, troubleshooting possible causes and solutions, providing options and doing prompt and careful work - Your City Rooter & Plumbing was great, and I will for sure use them again. They take pride in their work, explain their progress as they go and left the job site as tidy as it was when they arrived. Thanks Jake!"
Original water heater location.
3/4” water main service and potable water system repipe (PEX A and Copper)
Plumbing Project
Drywall patch
Bathroom Remodel

+83

Response time1 day
Response rate100%
Recommended by92%of homeowners
...
Showing 1-10 of 127
Basement Waterproofing FAQs, answered by experts

The best basement waterproofing method depends on the specific issue causing the water intrusion. For minor problems, simple solutions like installing a properly functioning gutter system to direct runoff away and grading the soil to slope away from your foundation can be effective.

If you have more significant water problems, the solution will need to be more robust:

  • For standing water on the basement floor, a floor drain or a sump pump system may be the best solution.

  • For water pooling around the foundation, installing an exterior French drain can intercept water before it reaches the basement walls.

Other effective waterproofing methods, which can be used depending on your home's specific needs, climate, and soil type, include sealing the interior walls, landscape alteration, installing interior drainage systems, and using a dehumidification system to control moisture levels.

Several types of insulation are effective for crawl spaces, with spray foam and rigid foam boards being two of the best options. Closed-cell spray foam insulation is a strong choice because it effectively repels moisture, resists biological growth, seals the air, and provides excellent thermal protection, especially in hard-to-reach areas. Rigid foam insulation boards are another excellent material as they insulate well, resist water damage, and will not settle over time like fiberglass or cellulose.

Mold and mildew are the things in basements that actually cause the musty odors, but moisture is the underlying issue that causes mold and mildew growth. Addressing moisture and water problems and then removing materials that are moldy are some of the best ways to get rid of the musty odors. Preventive measures after that—like installing air fresheners and a dehumidifier—can help keep musty odors from returning.

Yes, basement insulation needs a vapor barrier due to its susceptibility to moisture seeping in from the outside of the house. You should install a moisture barrier before you install insulation or purchase insulation that comes prebuilt with a moisture barrier to avoid water damage in your insulation and costly mold and water remediation expenses. 

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.

The Rossmoor, CA homeowners’ guide to basement waterproofing services

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