Diamond Certified Companies are Rated Highest in Quality and Helpful Expertise.

  • Why this rating is the most accurate.
  • Our editors gather deep company info.
  • Performance is Guaranteed.

Diamond certified companies are top rated and guaranteed

Why Trust Diamond Certified Waterproofing Companies Rated Highest in Quality?

When it comes to protecting the structural integrity of your home, there are few aspects more important than keeping out exterior moisture. You'll feel confident choosing a quality waterproofing specialist listed above because each has been rated Highest in Quality and has earned the Diamond Certified award. For more information on how best to choose and work with a waterproofing specialist in San Mateo County, read the following articles. Photo: All Seasons Roofing & Waterproofing, Inc. (2014)

You are the customer. If your goal is to choose a waterproofing company that will deliver high customer satisfaction and quality, you’ll feel confident in choosing a Diamond Certified waterproofing contractor. Each has been rated Highest in Quality in the most accurate ratings process anywhere. And you’re always backed by the Diamond Certified Performance Guarantee. Here’s why the Diamond Certified ratings and certification process will help you find a top-rated waterproofing company and is unparalleled in its accuracy, rigor and usefulness:

1) Accuracy: All research is performed by live telephone interviews that verify only real customers are surveyed, so you'll never be fooled by fake reviews.

2) Statistical Reliability: A large random sample of past customers is surveyed on an ongoing basis so the research results you see truly reflect a Diamond Certified company’s top-rated status.

3) Full Disclosure: By clicking the name of a company above you'll see the exact rating results in charts and read verbatim survey responses as well as researched articles on each qualified company.

4) Guaranteed: Your purchase is backed up with mediation and the Diamond Certified Performance Guarantee, so you can choose with confidence.

Click on the name of a Diamond Certified company above to read ratings results, researched articles and verbatim customer survey responses to help you make an informed decision.

More than 200,000 customers of local companies have been interviewed in live telephone calls, and only companies that score Highest in Quality in customer satisfaction–a 90+ on a 100 scale–as well as pass all of the credential-based ratings earn Diamond Certified. By requiring such a high score to qualify, the Diamond Certified program eliminates mediocre and poorly performing companies. Read detailed information about the ratings and certification process.

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SELECTED PHOTOS FROM THESE TOP RATED COMPANIES

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INDUSTRY INFORMATION AND RESEARCHED ARTICLES BY THE DIAMOND CERTIFIED RESOURCE

  • CertainTeed

  • Duro-Last

  • Owens Corning

  • GAF

  • Sarnafil

Fosroc Waterproofing
Carlisle Coatings & Waterproofing
Seal Krete Waterproofing Sealer
Damtite Waterproofing Cement
Zinsser Waterproofing Paint
Sunnyside Waterproofing Sealer
Cabot Waterproofing Sealer
Olympic Waterproofing
Krystol Waterproofing
Universal Protective Coatings
Bentonite Waterproofing
Sika Waterproofing Products
EverDry Waterproofing
Vulcan Waterproofing
Vandex Waterproofing
Aquaguard Waterproofing

elastomeric waterproofing
shower waterproofing
waterproofing brickwork
balcony waterproofing
residential waterproofing services
commercial waterproofing
bathroom waterproofing
roof waterproofing
epoxy waterproofing
basement waterproofing
deck waterproofing
concrete foundation waterproofing
concrete waterproofing
industrial waterproofing services
wood waterproofing
crawlspace waterproofing

Atherton
Belmont
Brisbane
Broadmoor Village
Burlingame
Colma
Daly City
East Palo Alto
El Granada
Emerald Hills
Foster City
Half Moon Bay
Hillsborough
La Honda
Loma Mar
Menlo Park
Millbrae
Montara
Moss Beach
Pacifica
Palomar Park
Pescadero
Portola Valley
Princeton by the Sea
Redwood City
San Bruno
San Carlos
San Gregorio
San Mateo
Sharp Park
South SF
West Menlo Park
Woodside

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94005
94010
94011
94014
94015
94016
94017
94018
94019
94020
94021
94025
94026
94027
94028
94030
94037
94038
94044
94060
94061
94062
94063
94064
94065
94066
94070
94074
94080
94083
94096
94098
94128
94401
94402
94403
94404

American General Contractors (AGC) (www.agc.org/)
American Subcontractors Association (ASA) (www.asaonline.com/)
Construction Specifications Institute (CSI) (www.csinet.org/)…

American General Contractors (AGC) (www.agc.org/)
American Subcontractors Association (ASA) (www.asaonline.com/)
Construction Specifications Institute (CSI) (www.csinet.org/)

Mason Contractors Association of America (MCAA) (www.masoncontractors.org/)
National Association of Waterproofing and Structural Repair Contractors (NAWSRC) (www.nawsrc.org/)
National Roofing Contractors Association (NRCA) (www.nrca.net/)
Sealant and Waterproofing Association (SWAO) (www.swao.com/)
Waterproofing Contractors Association (WCA) (www.thewaterproofers.org)

Know What You Want
Knowing What You Want in San Mateo County Waterproofing Companies

Once you are ready to employ a San Mateo County waterproofing service in the major cities of San Bruno, East Palo Alto, Menlo Park, Foster City, and Burlingame, it is important to know what you want. Unfortunately, many waterproofing companies are less than proficient and do not meet the standard of waterproofing required. Use the following questions to help you determine what you really want from a waterproofing service, and you are almost certain to find the most reliable and trustworthy waterproofing company. The benefits will be well-worth it!

  • Before the waterproofing work is started, are there any changes or repairs I’d like to have made?
  • Do I want a reputable waterproofing company that is fully insured and bonded?
  • Is this waterproofing company members of the Better Business Bureau and do they have a good local reputation?
  • Do I want a Diamond Certified company that is rated best in quality and backed by the Diamond Certified Performance Guarantee?
  • What personal and professional characteristics would I like my San Mateo County waterproofing company to have? (These may include good communication skills, starting the job on time, honesty, reliability, timeliness and cleanliness.)
  • What is the availability of the waterproofing contractors in San Mateo County?
  • What is my budget for waterproofing my home?
  • What type of waterproofing work am I looking for (i.e. foundation waterproofing, basement waterproofing, etc…)? 
  • Do I plan to live in this home for a long time? Or is this a house I plan to sell or use as rental property?
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What To Ask In Person
Interview Questions to Ask in Person with Waterproofing Companies in San Mateo County

The next step is to speak in person with waterproofing companies in San Mateo County, including the smaller towns of Atherton, Belmont, El Granada, Emerald Hills, Loma Mar, Millbrae, and Palomar Park. Ask the following questions when you interview waterproofing companies in person:

  • How long will the waterproofing project take?
  • Has your waterproofing company taken training and use the proper procedures in waterproofing?
  • Do you use professional grade waterproofing materials that are designed for the area you are waterproofing?
  • Will the waterproofing contractors give you names and numbers you can call as references? Be sure to check them all if they do.
  • Do you comply with state and local licensing laws?
  • Do you provide written guarantees of your work and materials?
  • Does the company ask for more than 1/3 of the cost for a deposit?
  • What is their EMOD rating?
  • Is your waterproofing company licensed, bonded, and insured?
  • Do you provide a detailed, written estimate of materials that will be needed?
  • Do you offer a manufacturer’s warranty?
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  • What To Ask References
    Ask These Questions to Previous Customers of San Mateo County Waterproofing Companies

    It’s best to choose a Diamond Certified waterproofing company because all certified companies have passed an in-depth ratings process that most other companies can’t pass. If you want quality from a waterproofing company in San Mateo County and the greater Bay Area, you can have confidence choosing a Diamond Certified company. Diamond Certified reports are available online for all certified companies. And you’ll never be fooled by fake reviews. That’s because all research is performed in live telephone interviews of actual customers.

    If you can’t find a Diamond Certified waterproofing company within reach, you’ll have to do some research on your own. If you do, it’s wise to call some references provided by your waterproofing company. Keep in mind, though, that references provided to you by the waterproofing company are not equal in value to the large random sample of customers surveyed during the Diamond Certified ratings process. That’s because references given to customers from companies are cherry-picked instead of randomly selected from all their customers. So the contractors will likely give you a few customers to call that they know are satisfied.

    If you do call references on your own, specifically ask for a list of the company’s 10 most recent customers. This will help avoid them giving you the names of only customers they know were satisfied.

    • Do you feel like the waterproofing company charged a fair price for the quality of the work?
    • If you need a waterproofing in the future, will you consider hiring this general contractor?
    • What type of waterproofing project did you hire the waterproofing professional to complete?
    • Did the waterproofing professional seem open to your input?
    • Did they finish the job on time?
    • Did the waterproofing specialist clean up after completing the job?
    • Did the waterproofing company provide answers to questions to your satisfaction?
    • Were there any unexpected costs? If so, what were these costs for?
    • Were you satisfied with the service from the (waterproofing company’s name)?
    • Did the waterproofing professional arrive on time?
    • If you live in smaller towns such as Brisbane, Broadmoor Village, Foster City, Half Moon Bay, Portola Valley, and Woodside, did they charge extra to travel to your home?
    • Would you recommend this waterproofing company to your family and friends?
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  • Review Your Options
    Finding a Reliable San Mateo County Waterproofing Company

    The Diamond Certified symbol has been awarded to companies that scored Highest in Quality in an accurate ratings process.

    Once you’ve wisely considered your choices in San Mateo County waterproofing contractors in the major cities of San Bruno, East Palo Alto, Menlo Park, Foster City, and Burlingame, it will be simple to find the best contractor for you. Before deciding on the best waterproofing company in San Mateo County for you, it’s important to consider these questions.

    • What does the waterproofing company offer that is specific to my needs?
    • What type of waterproofing work does the waterproofing contractor specialize in?
    • What are the billing practices of the waterproofing company?
    • Is the waterproofing contractor devoted to your satisfaction?
    • When was the last time rates were raised? It is important to understand how often the costs of the company are raised so that you are not surprised in the future by unexpected increases.
    • Is the waterproofing company bonded and insured?
    • Can the waterproofing contractors provide your requirements for scheduling and customer service?
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  • How To Work With
    Review Your Contract with San Mateo County Waterproofing Companies

    After drawing up the contract, both parties should sign it: the project owner and the waterproofing company. The contract you sign is binding and should protect the interests of both you and the contractor. Make sure you don’t sign a blank or incomplete estimate.

    Get the warranties in writing. They should cover the length of time as well as limitations. These written warranties should cover materials and workmanship, along with the names and addresses of the warrantor. This may include the contractor, manufacturer, and distributor. The contract should include the following:

    1. Company’s name, physical address, mailing address and phone number.
    2. Material cost and type of materials used
    3. How changes to waterproofing project and/or disputes are handled
    4. Structure of the payments and the schedule
    5. A clear, concise, and complete description of the waterproofing project, including start and completion dates.
    6. Detailed description of waterproofing project
    7. Any spoken promises that are made.

    Waterproofing Project Preparations
    Professional waterproofing contractors are able to handle the major and minor aspects of their work. But there are some things you can do to prepare for their arrival and while the work is in progress to help their job go more smoothly. You might even cut down on billable hours or the possibility of damage to your home and possessions.

    • Provide adequate clearance and parking space for work trucks.
    • Trim the plants and the bushes on the outside of your home.
    • Remove any indoor and/or outdoor furniture or movable items from the workspace.
    • Keep children and pets away from the construction areas.
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  • Be a Good Customer
    How to Be a Successful Waterproofing Company Customer in San Mateo County

    It's the waterproofing company’s responsibility put in quality waterproofing materials using the best possible installation techniques. But you play a big part in the success of your waterproofing company, too. Here are a few simple steps you can take to be a good customer when hiring a San Mateo County waterproofing company.

    Be sure your service representative has a phone number where they can reach you at all times while they’re waterproofing. The work will move along more smoothly if your waterproofing company can reach you for any necessary updates, questions or work authorizations.

    When your contractor contacts you, return calls promptly to keep the waterproofing company on schedule.
    Pay for the waterproofing work promptly.

    Ask your waterproofing company if you should call to check on the progress or if he will call you with updates.
    Remember, a friendly smile goes a long way!

    Be clear and upfront with the waterproofing company. Let them know what you want from your waterproofing material, the long-term outcome you’re expecting and specific ways they can satisfy your expectations.

    Before you hire a waterproofing company in San Mateo County, restate your expectations and goals, and reiterate to the waterproofing representative your understanding of the agreement. Most problems with local waterproofing companies occur because of a breakdown in communication. By being clear about your expectations and theirs, you can avoid most conflicts.

    Being a good customer is important. Waterproofing companies in San Mateo County appreciate customers who are straightforward, truthful and easy to work with. Your good customer behavior sets the tone from your end and creates an environment conducive to a good relationship. Things may very well go smoother and any problems may be more easily resolved.

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Check The Work
Verify the Completed Waterproofing Work against the Invoice

When the waterproofing is finished, most trustworthy San Mateo County waterproofing companies in the major cities of Daly City, San Mateo, Redwood City, South San Francisco, and Pacifica will give you a written invoice that details the completed work. This invoice will typically include the following:

  1. A list of all services performed.
  2. Any applicable warrantees or guarantees provided by waterproofing company.
  3. The total cost for waterproofing services, including the amount due for labor.
  4. The contractor’s name, physical address and license number.
  5. An itemized list of all the supplies purchased.

It’s wise to compare the completed work to what was promised on the written invoice. Ask your company representative to walk through the job site with you and show you the work. Check what was done against the invoice. During the walk-through, ask if there are any special instructions for maintaining your waterproofing project. If you have questions about the work that was done or the materials used, this is the time to ask.

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Written Warranties
Be Sure to Get Warranties in Writing from Waterproofing Companies in San Mateo County

Most good waterproofing contractors in San Mateo County including the smaller towns of Brisbane, Broadmoor Village, Foster City, Half Moon Bay, Portola Valley, and Woodside offer some type of warranty on their work or on the materials they’ve used. All warranty details should be provided to you in writing during the contract phase or at the completion of the job. This written warranty information should include the following:

  1. What products and services are covered. This should also include whether the contractor will replace or repair in the event of a product failure.
  2. If the warranties are transferrable to the new owner if you sell your home.
  3. Terms, limitations and exclusions on the waterproofing materials and workmanship.
  4. Your responsibility if you place a warranty claim (i.e., if you have to pay for labor or materials, or if you are required to pay a prorated amount).
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Top 10 Requests
10 Top San Mateo County Waterproofing Services

The top 10 requests for residential waterproofing services in San Mateo County in the major cities including San Bruno, East Palo Alto, Menlo Park, Foster City, and Burlingame are listed below.

Under Deck Waterproofing
To cover or treat under the deck with a material that will help to prevent the permeation of water.

Deck Waterproofing
To cover or treat the deck with a material that will help to make the deck impervious or unaffected by water.

Waterproofing Basement Walls
To cover or treat the basement walls with a material that will prevent the permeation of water.

Concrete Waterproofing Products
Products that are used to cover or treat concrete with a material that will prevent the permeation of water.

Foundation Waterproofing
To cover or treat the foundation with a material that will prevent the permeation of water.

Basement Waterproofing Paint
To paint the basement with paint that will help prevent permeation by water.

Waterproofing Material
Materials to make something impervious to water or unaffected by water.

Waterproofing Products
Products that are used to cover or treat with a material that will prevent the permeation of water.

Waterproofing Basement
To cover or treat the basement with a material that will prevent the permeation of water.

Crawl Space Waterproofing
To cover or treat the crawl space with a material that will prevent the permeation of water.

Top 10 Brand Requests

  • Damtite Waterproofing Cement
  • Zinsser Waterproofing Sealer
  • Carlisle Coatings & Waterproofing
  • Aquaguard Waterproofing
  • Fosroc Waterproofing
  • Universal Protective Coatings
  • Bentonite Waterproofing
  • Seal Krete Waterproofing Sealer
  • Vulcan Waterproofing
  • Vandex Waterproofing
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Glossary Of Terms
Glossary of Terms for Customers of Waterproofing Services

Below are key waterproofing terms and descriptions that will help you navigate your way through your waterproofing project.

balcony waterproofing
Products that are used to cover or treat a balcony with a material that will prevent the permeation of water.

basement waterproofing
Products that are used to cover or treat basements with a material that will prevent the permeation of water.

Below are key waterproofing terms and descriptions that will help you navigate your way through your waterproofing project.

balcony waterproofing
Products that are used to cover or treat a balcony with a material that will prevent the permeation of water.

basement waterproofing
Products that are used to cover or treat basements with a material that will prevent the permeation of water.

Also known as: waterproofing a basement, waterproofing basements, basement waterproofing materials, waterproof basement walls, wet basement waterproofing, basement systems, water proofing

basement waterproofing paint
To paint the basement with paint that will help prevent permeation by water.

Also known as: waterproof paint, basement waterproof paint, waterproof basement paint, waterproofing paint basement walls, basement waterproofing, basement waterproofing system, waterproofing basement, waterproofing a basement, waterproofing basements, basement waterproofing materials, waterproof basement walls, wet basement waterproofing, basement systems

bathroom waterproofing
Making the bathroom completely water sealed by applying special sealing tapes and waterproof underlays.

commercial waterproofing
Products that are used to cover or treat commercial buildings with a material that will prevent the permeation of water.

concrete waterproofing
Products that are used to cover or treat concrete with a material that will prevent the permeation of water.

concrete waterproofing products
Products that are used to cover or treat concrete with a material that will prevent the permeation of water.

Also known as: concrete waterproofing, foundation waterproofing products, basement waterproofing products, basement water proofing, waterproofing concrete

crawl space waterproofing
To cover or treat the crawl space with a material that will prevent the permeation of water.

Also known as: crawl space, waterproof crawl space, waterproofing crawl space, crawl space insulation

deck waterproofing
To cover or treat the deck with a material that will help to make the deck impervious or unaffected by water.

Also known as: deck waterproofing products, deck waterproofing membrane, under deck waterproofing systems, waterproof decking, deck coatings waterproof, waterproof deck, waterproofing decks, water deck coatings

efflorescence
White mineral deposits that show on the face of a masonry due to water leaching through the masonry to the dry surface. This is typically evidence of a leaking basement wall.

elastomeric waterproofing
Method of foundation moisture protection that uses impervious flexible sheet metal.

epoxy
A basement waterproofing product that is used to repair cracks in concrete or masonry. Epoxy is a material that is injected into the wall cracks. When it is cured, it forms a very strong bond with the base material. Epoxy can be used for the structural repair of a basement wall that leaks.

Also known as: epoxy waterproofing

foundation waterproofing
To cover or treat the foundation with a material that will prevent the permeation of water.

Also known as: foundation waterproofing membrane, foundations waterproofing systems, exterior foundation waterproofing

horizontal cracks
These cracks are usually associated with bowing or displacement of masonry walls that are not plumb vertically or horizontally. This is typically the cause of a basement wall that leaks.

infiltration
The inadvertent leakage of water or moisture into the building.

lateral pressure
The pressures that are exerted upon a wall by the surrounding soils.

level
An instrument that is used for measuring the plane of a vertical or horizontal surface. Excessive lateral pressure can cause a basement wall to leak.

poured concrete foundations
Walls that are made by pouring concrete into forms that are usually held together by tie-rods. After the forms are removed the tie-rods are clipped. The location frequently leaks because of the thermal movement, the curing process, and also when water pressure is present.

residential waterproofing
To cover or treat the residences with a material that will help to make the them impervious or unaffected by water.

Also known as: crawl space waterproofing, waterproofing basements, waterproofing a basement

roof waterproofing
To cover or treat the roof with a material that will help to make the roof impervious or unaffected by water.

shower waterproofing
To cover or treat the shower with a material that will help to make the shower impervious or unaffected by water.

under deck waterproofing
To cover or treat under the deck with a material that will help to prevent the permeation of water.

Also known as: under deck roofing, under deck waterproofing systems, waterproof under deck, deck drainage system, waterproofing under deck

waterproofing basement
To cover or treat the basement with a material that will prevent the permeation of water.

Also known as: waterproof basement walls, waterproofing basement walls, waterproofing a basement, waterproofing basement floor, waterproof a basement, waterproof basements, water basement flooring, waterproofing basements, crawl space waterproofing, concrete waterproofing

waterproofing basement walls
To cover or treat the basement walls with a material that will prevent the permeation of water.

Also known as: waterproofing basement, waterproofing basement floor, waterproof paint for basement walls, waterproofing basement walls from outside, waterproof basement walls, waterproofing basement wall, waterproof basement, waterproofing basements, waterproofing a basement

waterproofing brickwork
To cover or treat the brickwork with a material that will help to make the brickwork impervious or unaffected by water.

waterproofing material
Materials to make something impervious to water or unaffected by water.

Also known as: waterproof material, waterproof material fabric, waterproofs, waterproofing materials, basement waterproofing materials, waterproofing material suppliers, waterproof decking, waterproof basement walls, under deck waterproofing

waterproofing products
Products that are used to cover or treat with a material that will prevent the permeation of water.

Also known as: basement waterproofing products, masonry waterproofing products, waterproofing basement, wood waterproofing products, waterproof basement, exterior basement waterproofing products, basement systems, waterproofing basements products, crawl space waterproofing products, basement waterproofing materials

wood waterproofing
To cover or treat the deck with a material that will help to make the deck impervious or unaffected by water.

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Frequently Asked Questions
FAQ to Ask Local Waterproofing Contractors

Q: Why choose a Diamond Certified home waterproofing company?

Q: Why choose a Diamond Certified home waterproofing company?
A: Diamond Certified helps you choose a home waterproofing company with confidence by offering a list of top-rated local companies who have passed the country’s most in-depth rating process. Only waterproofing companies rated Highest in Quality earn the prestigious Diamond Certified award. Most companies can’t pass the ratings. American Ratings Corporation also monitors every Diamond Certified company with ongoing research and ratings. And your purchase is backed by the Diamond Certified Performance Guarantee. So you’ll feel confident choosing a Diamond Certified waterproofing company.

Q: How is a basement waterproofed?
There are many ways to waterproof your basement depending on how severe the water leaking problem is. It might be as easy as sealing the walls with masonry sealer. Another option is you might need a sub floor drain system.

Q: Why should I waterproof the basement?
There are a multitude of reasons to waterproof your basement, such as a healthier living environment, an increased living space and also storage space. This will also help you avoid additional structural damage to your foundation. It will also increase your property value.

Q: Can I waterproof my basement if is already finished?
A: There are numerous solutions to choose from with little influence on your interior finishes. This could be something as simple as removing a section of the paneling or the drywall, removing the baseboard or possibly even pulling back the carpet.

Q: How long should the waterproofing job take?
A: The length of time will vary depending on the size of your basement and how complex the job is. At the most, it should not take longer than 3 days.

Q: Can a French drain solve seepage and moisture problems?
A: It won’t solve all your problems. You will also need to HydroTex the walls and floors so you have that 100% dry all the time design. A French drain is a sub-soil piping system which is parallel to the footer which connects into the sump pump.

Q: What is the best time of year to install a waterproofing system in my home?
A: You should install it anytime from spring through fall.

Q: On the average, how long does it take to install a waterproofing system?
A: 100 linear feet will generally take from 4 to 5 days to waterproof. This may vary depending on your home, the methods used to waterproof the space and your waterproofing contractor.

Q: Is a wet basement a sign that a house was poorly built?
A: It doesn’t necessarily mean that. A recent study that was done in the Washington, D.C. area found that over 86 percent of cement block constructed homes that were over 25 years old, had water problems. During the life of a house, almost all of them will experience some form of water problem.

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