Basement Waterproofing Solutions

Serving San Francisco and East Bay Since 1983

Protect Your Home With Professional Basement Waterproofing From Mares & Dow Construction & Skylights

A dry, safe basement is essential for both the comfort and structural health of your home. Bay Area homeowners know that excess moisture can lead to mold, mildew, and foundation damage if left unchecked. Mares & Dow Construction & Skylights brings over 40 years of construction expertise to basement waterproofing, combining advanced techniques, high-quality materials, and precision craftsmanship to keep your basement dry and your home secure.

Waterproofing is not just a maintenance task—it’s a long-term investment in your property’s value and your family’s safety. From interior and exterior drainage solutions to sump pumps, vapor barriers, and crack sealing, we design customized waterproofing systems for each home, ensuring reliable performance no matter the weather or soil conditions.

Basement Waterproofing Services: Safeguarding Homes Across the Bay Area

Basement waterproofing is a critical step for Bay Area homeowners seeking to prevent water intrusion, mold, and foundation damage. At Mares & Dow Construction & Skylights, we begin with a thorough inspection of your basement, identifying leaks, cracks, grading issues, and drainage concerns. This allows us to create a comprehensive waterproofing plan that addresses both immediate problems and long-term protection.

We specialize in a wide range of waterproofing techniques, including exterior excavation and drainage, interior French drains, sump pump installation, crack repair, sealants, and vapor barriers. Our team uses premium materials and proven construction methods to ensure water is effectively redirected away from your basement, protecting your home and keeping your indoor spaces safe and comfortable.

With decades of experience, Mares & Dow Construction & Skylights is the trusted Bay Area general contractor for basement waterproofing of any scale. From initial inspection and strategy development to installation and final checks, we manage every detail, ensuring that your basement remains dry, structurally sound, and ready for whatever purpose you envision.

Some of our basement waterproofing methods include applying high-quality sealers, upgrading drainage systems, and using waterproof coatings. Together, these methods can provide a robust solution to prevent flooding, moisture issues, and water damage.

 Exterior Waterproofing

Interior Waterproofing

Crawl Space Encapsulation & Repair

Crack Injection Repair

Specialty General Contractor Services
Waterproofing
Waterproofing

Ready to bring your vision to life?

Contact Mares & Dow Construction & Skylights today and let our 40 years of Bay Area expertise turn your dream project into reality.

Benefits of Going with Mares & Dow Construction & Skylights

Experience & Accreditations

Mares & Dow Construction & Skylights is certified and accredited by the best manufacturers in the industry. From Grip-Tite Foundation Systems, to James Hardie Siding, to VELUX Skylights, you can be sure to get the highest quality products for whatever your project.

Knowledge & Expertise

Serving the San Francisco Bay Area for over 40 years with quality general contracting, home remodeling, and skylight installation means you'll get the benefits of our expertise for every project.

Proven Customer Satisfaction

Maintaining a high level of customer satisfaction, we are proud to have provided our customers throughout the San Francisco Bay Area with quality construction and home improvement services for 40 years. With half of our new clients coming to us from referrals, it’s no secret that our customers/friends are truly pleased with the work we do.

40
Years of Experience

Serving the San Francisco Bay Area for 40 Years

Mares & Dow Construction & Skylights, Inc. is a longstanding partnership of 40 years between Archie Mares, Dennis Dow and hundreds of great customers throughout the San Francisco Bay Area. We are a general contractor, building custom homes, additions, home remodeling, skylights, retaining wall construction and commercial remodeling.

Maintaining a high level of customer satisfaction, we are proud to have provided our customers throughout the San Francisco Bay Area with quality construction and home improvement services for 40 years. With half of our new clients coming to us from referrals, it’s no secret that our customers/friends are truly pleased with the work we do.

Philosophy

Quality and service come first. We approach every job, big or small, with the same care and attention to detail we’d give our own homes. Our team combines time-tested building practices with modern innovation to deliver results that stand the test of time.

Get In Touch

Ready to start your next project? Whether you’re planning a home remodel, skylight installation, or foundation repair, our team is here to help.

Reach out to us for a free consultation. We’ll listen, offer expert guidance, and provide a detailed estimate tailored to your goals.

Our Mission

To enhance the lives of Bay Area homeowners through expert construction, thoughtful design, and dependable service. For over 40 years, our mission has remained simple: build with integrity, serve with pride, and create spaces our clients love to live in.

Values

We believe in integrity, craftsmanship, and lasting relationships. Every project is built on honesty, transparency, and respect - for our clients, our partners, and the homes we’re entrusted to improve.

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Words of Appreciation from Our Valued Clients

At Mares & Dow Construction & Skylights, we believe great service is its own reward. Every satisfied client, glowing review, and lasting relationship reminds us why we’ve dedicated over 40 years to building with integrity, craftsmanship, and care.

Mares & Dow Construction & Skylights installed a large Velux skylight for me in August 2017. The entire experience was wonderful and the skylight is beautiful, both functionally and aesthetically. Janet made sure the work was scheduled to be completed before a trip I had planned. Jimmy measured carefully when he quoted the work and even accommodated a last minute change on the location when he arrived to do the work. They protected my new floors and were careful to keep dust to a minimum. Archie came by to ensure that all was going smoothly. Freddy helped matched the stain on my nearly 70 year old tongue and grove ceiling that really took some effort and he even matched some a few small spots that a previous contractor had sanded and removed the original stain. EVERYONE was cheerful and knowledgeable. Now, my little mid century house has emerged into the light!

Norma B. San Francisco, California

Mares & Dow Construction & Skylights replaced two aging skylights in our bedroom and installed automatic blinds on four skylights. This was not an easy job, since our bedroom has very very high cathedral ceilings. In fact, one other skylight installer refused to do the job altogether, and a second made a bid that was almost twice as expensive as Mares & Dow Construction & Skylights. Janet Mares, who was our main contact for the job, was a pleasure to work with. Her son, Jimmy, who led the installation, was fearless climbing the ceiling, and he eally knew his stuff. We’re thrilled with our new and improved skylights, and we appreciate Mares & Dow Construction & Skylights’ solid, reasonably priced, work. Thanks guys!

Aaron R. Concord, California

I’ve had Mares & Dow Construction & Skylights install 3 sun tunnels in my home and most recently, 2 skylights in my garage/art studio. I couldn’t be more satisfied with the quality of their work and professionalism! All my communications with their office and installers have been extremely pleasant. I would use them again (and again) and highly recommend them to anyone looking to install Velux skylights/sun tunnels in their home!

Myla L. Concord, California

Being a new homeowner, i really did my research before having someone come out and give me a quote on a skylight. You never know what to believe when you read yelp reviews. So, i went ahead and had Jimmy from mares and dow come out and give me an estimate. He was right on time, came out and measured and was very professional while he was here. Janet called me a few days later and sent me over an estimate. I went them them and couldn’t be happier. It arrived in the time frame she had told me, and they were out that week. The workers came out on time, and were very friendly and professional. Dennis ( one of the owners) came out as well and checked on the job. The went above and beyond with their work. The skylight looks beautiful! Night and day from the old one. If you are wanting a skylight, i strongly reccomend going with mare and dow

Chris W. Walnut Creek, California

We had Mares & Dow Construction & Skylights install a Velux skylight in our new master bathroom. The space was small and dark, so Mares & Dow Construction & Skylights suggested a big skylight to add in lots of natural light. They built in a double crown molding to beautifully frame the skylight, and now the space is open and airy with wonderful natural light. We can open the skylight during warm months to let in fresh air. It was a superb addition to our bathroom renovation and a great suggestion from Mares & Dow Construction & Skylights. They did a fantastic job and were great to work with! Thanks guys!

Jennifer S. Walnut Creek, California

Our Service Area

  • Alameda
  • Alamo
  • Albany
  • Benicia
  • Concord
  • Berkeley
  • Danville
  • Dublin
  • El Cerrito
  • Hercules
  • Lafayette
  • Martinez
  • Moraga
  • Oakland
  • Orinda
  • Pinole
  • Piedmont
  • Pleasant Hill
  • Pleasanton
  • Richmond
  • San Francisco
  • San Ramon
  • Walnut Creek

Building Knowledge: Insights From 40 Years of Craftsmanship

At Mares & Dow Construction & Skylights, sharing knowledge is part of our commitment to great service. Our blog offers expert tips, project insights, and inspiration drawn from decades of experience building and remodeling homes across the Bay Area.
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Frequently Asked Questions about our Basement Waterproofing Services

Moisture issues in a basement can cause serious problems if not addressed properly, and homeowners often have questions about waterproofing options, methods, and costs. To help you make informed decisions, we’ve compiled answers to the most common questions about our basement waterproofing services. These FAQs explain our approach, techniques, and materials so you can feel confident in protecting your home with Mares & Dow Construction & Skylights.
We provide comprehensive waterproofing solutions, including interior and exterior drainage systems, sump pump installation, French drains, crack repair, sealants, vapor barriers, and exterior grading improvements. Every system is customized to your basement’s layout, soil type, and moisture challenges.
Signs include standing water, damp walls or floors, musty odors, efflorescence (white mineral deposits), mold growth, and foundation cracks. Our team performs a detailed inspection to assess moisture risks and recommend the most effective solutions.
Project timelines vary based on the size of the basement, scope of work, and chosen waterproofing methods. Small-scale repairs or interior French drains can take a few days, while full exterior systems may require a week or more. We provide a detailed schedule and maintain communication throughout the process.
Yes. As a licensed Bay Area general contractor, we manage all permits and inspections required for basement waterproofing systems, ensuring compliance with local building codes and safety regulations.
When properly installed, our waterproofing systems significantly reduce the risk of basement flooding. By managing water flow around and beneath your home, we protect your foundation and indoor spaces from water intrusion.
Absolutely. We repair damaged or failing systems, replace old piping, sump pumps, or drainage components, and upgrade older systems to improve long-term performance.
We begin with a thorough site evaluation, identifying sources of water intrusion and soil or grading issues. Our team uses high-quality materials, precision installation techniques, and proper drainage design to create a system that reliably protects your basement.
Schedule a free consultation with Mares & Dow Construction & Skylights. We’ll inspect your basement, discuss your waterproofing needs, and develop a customized plan to keep your home dry and protected.