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

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Diamond certified companies are top rated and guaranteed

Why Trust Diamond Certified Roofing Companies Rated Highest in Quality?

Photo: Los Gatos Roofing (2012)

You are the customer. If your goal is to choose a roofing company that will deliver high customer satisfaction and quality, you’ll feel confident in choosing a Diamond Certified roofing 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 roofing 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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William Young is owner of Edge Roofing, a Diamond Certified company. He can be reached at (415) 529-6796 or by email.

William Young

diamond certified contributor profile and expert article

William Young: A Competitive Edge

By James Florence, Diamond Certified Resource Reporter

SAN MATEO — As a general contractor, William Young had considered getting into roofing for a long time, but he knew if he did, he’d need to find a competitive edge. “More and more, I was coming across projects that required roof work, so going into roofing just made sense,” he says. “Eventually, in 2006, I got my C30 license to specialize in roofing. However, in order to be successful, I knew I’d need a great team of installers, so I sought out roofers throughout the Bay Area who had good reputations. Edge Roofing was built on the knowledge and experience of myself and my team.”

When asked his favorite part of his job, William gives a twofold answer. “First, I love seeing my clients happy. Second, I love watching the aesthetic transformation that a roof undergoes in just a matter of days. A roof has such a major visual impact, so it’s very satisfying to see that before-and-after progression.”

A lifetime resident of San Mateo, William spends his time outside of work on a variety of pastimes. “I’m an avid fisherman,” he details. “I have a boat and enjoy fishing for bass and crappies. I try to get out on the water at least once or twice a month. I also like to stay fit by going to the gym several times during the week.” In addition to his personal hobbies, William enjoys spending quality time with his wife, son and daughter. “We go camping a couple of times each year at places like Clear Lake and Lake Camanche. Camping was a mainstay for me growing up, so it has become a real family tradition at this point.”

In his life and career, William espouses the importance of relationships. “To me, forging relationships is vital, whether it’s in my personal life or in the professional sphere,” he affirms. “When you have good relationships with people, it makes communication easier and results in a better experience. This is especially important when it comes to customer satisfaction. Clients want to be kept in the loop, have their questions answered and get help picking out materials. That’s why I’ve always made it a point to focus on the relational aspect and create a smooth, enjoyable experience for the customer.”

When asked the first thing he’d do if he were to retire tomorrow, William says he’d go fishing. “Maybe I’d take a bigger fishing trip than I usually do. I’ve heard about some lakes in the South that have great fishing, so it would be fun to take a trip down there and see what I catch.”

Ask Me Anything!

Q: What was your first job?

A: I worked at the San Mateo Fairgrounds during the summers when I was a teenager, doing groundskeeping and setting up for shows and events.

Q: What’s your favorite movie?

A: It’s a tie between “Jaws” and “Top Gun.”

Q: What’s your favorite sports team?

A: The San Francisco 49ers.

Q: If you could travel anywhere in the world, where would you go?

A: New York City.

Q: What’s your favorite holiday?

A: Thanksgiving, because it’s a joyful time of coming together and sharing food, with no real financial obligations attached.

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Why Roof Gutters Are a Worthwhile Investment


SAN MATEO — Roof gutters are responsible for diverting water off of the roof and away from the home. Throughout the San Francisco Peninsula, there are a lot of older homes that don’t have gutters. While these homes may have been missing… Read more

Expert Video Tip

Video: The True Cost of Missing Gutters

Complete Video Transcription:

SAN MATEO — Host, Sarah Rutan: If your roof doesn’t have a proper gutter system, you may be surprised to learn how it can impact your home. Today… Read more

Carlos Rodriguez is a 25-year veteran of the roofing industry and president of Mr. Roofing, Inc., a Diamond Certified company since 2009. He can be reached at (650) 605-3927 or by email.

Carlos Rodriguez

diamond certified contributor profile and expert article

Carlos Rodriguez: Close to Home

By James Florence, Diamond Certified Resource Reporter

SOUTH SAN FRANCISCO — After he graduated college, Carlos Rodriguez was on the cusp of a promising career in the corporate world. However, when a need arose at his family’s roofing company, he opted to apply his administrative abilities closer to home. “My dad started Mr. Roofing in 1989, so I’ve been around it since I was about four years old,” he says. “I went to UC Berkeley and took a business management job after I graduated, but then my dad called me and requested my help with his company. We came to an agreement that I would take care of the sales and customer service side while he would handle the production. With my prior education and experience, I was able to implement my knowledge of customer service and business management toward improving the company’s operations.”

In 2006, following his father’s retirement, Carlos assumed ownership of Mr. Roofing, Inc. Today, as president and CEO, he says his favorite part of his job is its inherent versatility. “I appreciate the fact that I’m not always cooped up in an office; rather, I get to run around and meet a lot of really interesting people from diverse backgrounds. And, of course, I enjoy taking in some great views while up on our customers’ roofs.”

Carlos was born in Mexico and came to the United States with his family when he was three years old. Today, as a resident of South San Francisco (where he lives with his wife, Teresa, and their two children), he says he enjoys being part of the local community. “It’s pretty cool to run into my customers while out and about and receive a warm greeting.”

Outside of work, Carlos says the majority of his favorite pastimes involve sports. “I really enjoy sports because they demonstrate the greatness that human beings can achieve.” In addition to playing basketball with friends and attending Golden State Warriors games, he enjoys being a spectator at his children’s sporting events. “My son, Ladislao, plays football for Junipero Serra High School, and my daughter, Nayeli, plays for the San Bruno Storm, a traveling softball team that I help coach. I love to watch them compete—they make me proud.”

In his life and career, Carlos finds inspiration in a quote from Henry Ford: “Whether you think you can, or you think you can’t—you’re right.”“I think one of the biggest obstacles most of us face is our self-induced limitations,” he explains. “If you go into a situation expecting to fail, it’s a lot more likely to happen than if you believe in yourself and maintain a positive attitude.”

When asked the first thing he’d do if he could retire tomorrow, Carlos says he’d seek out new opportunities to touch the lives of others. “In my current career, I enjoy educating my clients and coaching my employees in regard to accomplishing our goals, so if I retired tomorrow, I would probably get into teaching, coaching or another field that would allow me to inspire and motivate others.”

Ask Me Anything!

Q: What’s your favorite sports team?
A: The Golden State Warriors.

Q: What’s your favorite local restaurant?
A: La Taqueria on 25th and Mission in San Francisco.

Q: What’s one website you visit on a daily basis?
A: ESPN.com

Q: Did you play any sports in high school?
A: Yes, I played football and basketball.

Q: What’s your favorite snack?
A: Tacos—they’re great any time of day, any day of the week!

Read more

How to Remove and Prevent Roof Moss


SOUTH SAN FRANCISCO — Does your roof have moss, algae or lichen growing on it? Here’s how to remove it and prevent it from reappearing: Cleaning Make a cleaning solution of bleach and water (if you want something more environmentally… Read more

A Consideration for Installing Solar


SOUTH SAN FRANCISCO — Installing a solar system on your home can be a great investment, but before you commit, there’s one thing you should consider: the age of your roof. If you have an older roofing system, installing solar… Read more

The Importance of Roof Ventilation


SOUTH SAN FRANCISCO — Ventilation is a critical roof component that affects both the longevity of roofing materials and the health of the home’s inhabitants. When a roof isn’t adequately ventilated, hot air can become trapped in the attic and… Read more

Avoiding Water Intrusion Issues with Steep and Flat Roofs


SOUTH SAN FRANCISCO — While water intrusion is a concern with any roof, different roof styles present different areas of concern. Here are two prevalent roof styles and the water intrusion issues commonly associated with them. Steep roofs Roofing contractors… Read more

Expert Video Tip

Video: The Importance of Roof Ventilation

Complete Video Transcription:

SOUTH SAN FRANCISCO — Host, Sarah Rutan: If you’re planning for a roof replacement, one thing you should discuss with your contractor is ventilation. Today we’re in… Read more

Cameron Radonich is marketing director at Los Gatos Roofing, a Diamond Certified company since 2005. He can be reached at (408) 256-3960 or by email.

Cameron Radonich

diamond certified contributor profile and expert article

Cameron Radonich: Bring it on Home

By James Florence, Diamond Certified Resource Reporter

SAN JOSE — Aiming for a career in professional sports, Cameron Radonich was in the process of earning his master’s degree when a simple realization led to an abrupt change in direction. “I was working on a master’s in organizational leadership, with the intention of coaching professionally,” he explains. “Halfway through the program, however, I realized I wasn’t willing to take a job outside of the Bay Area.” Recognizing that this provision was incompatible with his coaching aspirations, Cameron opted to take a route that would fulfill both his personal and professional criterion: he joined his father’s business, Los Gatos Roofing. “Going to work for my father gave me an opportunity to remain in my hometown while applying my formal education in a professional capacity.”

Today, as Los Gatos Roofing’s marketing director, Cameron says he enjoys his daily interactions with co-workers and customers most of all. “My favorite part about my job is the people I work with. I like the mentality of the people who work in construction, and I also enjoy being able to work with homeowners.”

Residing in San Jose with his wife, Katie, and their daughter, Gulianna, Cameron expresses his appreciation for both the local community and the region’s topographical attributes. “There’s a highly educated population base here in the Silicon Valley, so there are always good conversations to be had,” he says. “I also love the Santa Cruz Mountains. We have a family ranch up there, and I have a lot of fond memories from spending time there during my childhood.”

Outside of work, Cameron engages in a variety of pastimes, from playing sports to winemaking. “My favorite thing to do is play baseball and softball, which I do at least once a week, whether with friends or in my local league. I’ve also become very interested in winemaking—in fact, we recently started looking into developing the land on our ranch into a vineyard.”

In his life and career, Cameron finds inspiration in a quote from 19th century American writer Ralph Waldo Emerson. “The quote I have on my wall is basically Emerson’s definition of success, which is to have left the world a better place,” he explains. “My favorite parts are where he says, ‘To laugh often and much’ and ‘to win the respect of intelligent people and the affection of children.’ I try to apply this in my own life by making my business a place where employees enjoy coming to work and customers feel appreciated.”

When asked the first thing he’d do if he could retire tomorrow, Cameron says he would redirect his vocational efforts and apply them toward winemaking. “I’d spend more time developing our family’s vineyard and trying to make that successful.”

Ask Me Anything!

Q: Do you have a favorite sports team?
A: The Oakland A’s and the San Francisco 49ers.

Q: If you could time travel, would you go to the past or the future?
A: The past—there are parts of history I’m fascinated with and would like to see firsthand.

Q: If you could drive any car, what would it be?
A: A 1968 Ford Mustang Fastback.

Q: What do you like on your pizza?
A: Basil and tomatoes.

Q: What was your favorite toy as a child?
A: Any kind of ball—baseball, softball, tennis ball, whatever.

Q: Do you collect anything?
A: Air Jordan basketball shoes. I have about 30 pairs!

Read more

A Systematic Approach to Roofing


SAN JOSE — When it comes to choosing materials for a new roof, there are a couple of ways to go about it. Many homeowners opt to trust the expertise of their roofing contractors and let them use the materials… Read more

Expert Video Tip

Video: Considerations for Buying a Roofing System

Complete Video Transcription:

SAN JOSE — Host, Sarah Rutan: Prior to investing in a new roof, its good to know the full extent of your options. Today, we’re… Read more




  • CertainTeed

  • Owens Corning

  • GAF

  • Malarkey

  • Eagle Tile

  • Boral

  • Monier

  • HydroStop

  • IKO

  • Tropical

Monier LifeTile
WesTile Roofing
IB Roof Systems
ABC Seamless Roofing
Enviroshake Engineered Roofing
GAF Roofing
Decra Roofing
Garland Roofing
Suprema Roofing
Malarkey Roofing
John Manville Roofing
Custom-Bilt Roofing
Georgia-Pacific Roofing
EPDM Roofing
Duro-Last Roofing
Carlisle Roofing
Tremco Roofs
ELK Roofing
Atlas Roofing Corporation
CertainTeed Roofing
Owens Corning Roofing
TAMKO Building Products, Inc.

roof coating application
membrane roof
wood shake roofs
new roofing
roof repair
flat roofs
tile roofs
roof vent installation
tin roof
roofing shingles
roof installation
rubber roof installation
commercial roofing
roof panel replacement
roof leak repair
steel roofing
steel roofing
aluminum roofing
asphalt roof
copper roof installation
corrugated roofing

Broadmoor Village
Daly City
East Palo Alto
El Granada
Emerald Hills
Foster City
Half Moon Bay
La Honda
Loma Mar
Menlo Park
Moss Beach
Palomar Park
Portola Valley
Princeton by the Sea
Redwood City
San Bruno
San Carlos
San Gregorio
San Mateo
Sharp Park
South SF
West Menlo Park


National Roofing Contractors Association (NRCA) (www.nrca.net/)
Slate Roofing Contractors Association (SRCA) (www.slateroofers.org/)
Tile Roofing Institute (TRI) (www.tileroofing.org/)
EPDM Roofing Association (ERA) (www.epdmroofs.org/)
Western States Roofing Contractors Association (WSRCA) (www.wsrca.com/)
Asphalt Roofing Manufacturers Association (ARMA) (www.asphaltroofing.org/)
Roof Coatings Manufacturers Association (RCMA) (www.roofcoatings.org/)
International Green Roofing Association (IGRA) (www.igra-world.com/)
Metal Roofing Alliance (MRA) (www.metalroofing.com/)
Roofing Contractors Association of California (RCAC) (www.rcacal.com/)

Know What You Want
Decide What Type of New Roof You Want

Before you interview good roofing contractors over the phone or in person, think carefully about your project, the type of roof you want and what you’re looking for in a roofing company. Some homeowners find it helpful to write down questions and keep a file of ideas and samples. This allows them to present clear expectations to the roofing contractors they interview. Here are a few questions to get you started:

  • Do I want a Diamond Certified company that is rated best in quality and backed by the Diamond Certified Performance Guarantee?
  • Do I need a new roof or roof repairs?
  • What is my budget for roofing repairs and reroofing?
  • Is there a specific roof color or roofing material I’m interested in?
  • Are there any details that may make my roofing project more complicated or need to be taken into account during the planning (i.e. a steep roof, multiple dormers, a narrow driveway that may be a problem for supply trucks, a short timeframe in which I need my new roof or roof repairs completed)?
  • What characteristics and qualities do I want in a San Mateo County roofing contractor? This may include timeliness, reliable follow-up services, emergency roofing repair services, good communication skills, etc.

Thoroughly Interview Good Roofing Contractors in San Mateo County
If you have a list of prepared questions to ask the roofing contractors you interview, you’ll get better results. Having prewritten questions will keep you on track and will make sure you ask the questions that are most pertinent to the success of your job. Write down the roof contractors’ answers and note their tone and the general feeling you get from your time with them. This will help you narrow down your choices and pinpoint the best local roofer in San Mateo County for you.

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What To Ask In Person
Questions to Ask San Mateo County Roofing Contractors in Person
  • How much time will the job take, from ordering the new roof tiles or shingles to completion of installation?
  • Will I be able to stay in my home during the roofing installation?
  • Is the new roof energy efficient? Will it reduce my electric bills?
  • Do you have any recent projects in my area of San Mateo County where I can see how the roof installations look from the street?
  • Do you have customer references I can call?
  • How would I handle future service issues? Are you responsible for warranty work if there’s ever a problem with my new roof or reroofing?
  • What can I do to make the roof installation process easier?
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  • What To Ask References
    Ask Previous Customers About Their Experiences with Local Roofers in San Mateo County

    It’s best to choose a Diamond Certified roofer because all certified companies have passed an in-depth ratings process that most other companies can’t pass. If you want quality from a roofer 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 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.
    The following are some questions to ask roofing company references:

    • Were you satisfied with the roof installation and the customer service from _(roofing company name)_?
    • What was the type and scope of job they did for you (reroofing/roof replacement, roof repair, roof weatherproofing, roof leak repairs, etc.)?
    • Did the San Mateo County roof contractor you hired complete the work on time?
    • Did the contractor keep you up-to-date on the status of the project?
    • Were there unexpected costs? If so, what were they for and were they avoidable?
    • Did the roofing company employees show up on time?
    • Did the employees clean up after finishing the window installation?
    • If you need a new roof or roof repairs in the future, would you use this roofing contractor again?
    • Would you recommend them to friends or family?
    • Can I visit your home to see the completed roof installation or roof repairs?
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  • Review Your Options
    Deciding on Good Roofing Contractors

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

    Your choice of roofing contractor determines the value of your new roof and can impact the resale value of your home. So before deciding on the best roofers in San Mateo County for your roofing job, it’s important to consider the following questions:

    • Can the local roofing contractors meet your needs in terms of scheduling, products and installation preferences?
    • Are the San Mateo County roofers knowledgeable on the products they sell and install?
    • Can the roofing company liaison tell you which roofing services and roof products best suit your needs and why (i.e. roof leak repairs, roof panel replacement, aluminum roofing, corrugated roofing, membrane roofing products, ceramic tile roofing, wood roof shingles, etc.)?
    • Is the roofing installation company sensitive to your budget? Can they offer various products that fit your resources? Most contractors will give you bids for good, better and best options that include choices of products, design and aesthetics, prices, brand names/manufacturers and roofing services.
    • Do the roof contractors in San Mateo County offer warranties in the event of a product failure or installation error? Will they put these guarantees in writing?

    You may also want to examine your own expectations for your new roof, realizing that not all may be possible. For instance, when having a new roof installed, it may not be reasonable to expect an uninterrupted schedule or a quiet worksite. So talk with your roofing contractor about what you can reasonably expect while the roofers are working on your home. You are more likely to be satisfied with the completed product and the work while it’s in progress if you go into the job with fair expectations.

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  • How To Work With
    How to Get Roofing Repair Estimates You Can Trust from San Mateo County Roofers

    The best roofing contractors in San Mateo County, including those in the larger cities of San Bruno, Foster City, San Mateo, Daly City, Redwood City and South San Francisco and even some in the smaller towns, can be selective about which roofing jobs they take. That’s because not every roofing company is able to handle every kind of roofing repairs or roof installation job. So it’s important to look for the high-quality roofing contractors that have the skills and ability to do the roofing work you’re looking for.
    Once you’re narrowed down your choices by interviewing roofers, meet in person with the roofing estimator at your home for an on-site estimate. Discuss what you are looking for in your new roof or roofing repairs, and listen to their suggestions of materials and styles.
    You may want to get several estimates, but limit it to a small number provided by the best roof contractor candidates. Roofers appreciate knowing that you’re looking for good service and fair prices rather than the lowest-cost roofing you can find. This will also improve your chances of finding a quality roofer who really understands their trade and provides the best quality workmanship on roofing installation and roof repairs.
    Get a Detailed Roofing Contract from Your San Mateo County Roofer
    Now that you’ve found the roofing contractor that’s best for you, it’s the perfect time to ask for a written contract that outlines the details of your roofing job. The contract should include the cost of the job, details about the materials to be used and installation information, such as the projected start and end dates.
    Read the entire contract and be sure you understand all the terms and limitations before you sign. Once you’ve signed a contract with a San Mateo County roofing company, you have committed to abide by the information within the contract, so for your protection, never sign a blank or incomplete estimate.
    Remember, the contract is there to protect you and your roofing contractor. So it’s advisable to write in any verbal agreements or special requests that you’ve confirmed with your San Mateo County roofer. This includes any special agreements you’ve reached, such as reasonable expectations for the care of your home and yard during the roofing installation process.

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  • Be a Good Customer
    How Can You Be a Good Roofing Company Customer?

    It’s the roofer’s responsibility install quality roofing products using the best possible installation techniques. But you play a big part in the success of your new roof installation, too. Here are a few simple steps you can take to be a good customer when hiring a San Mateo County roofing contractor.

    • Be clear and upfront with the roofers. Let them know what you want from your new roof, the long-term outcome you’re expecting and specific ways they can satisfy your expectations.
    • Before you hire a roofing contractor in San Mateo County, restate your expectations and goals, and reiterate to the roofing company representative your understanding of the agreement. Most problems with local roofers occur because of a breakdown in communication. By being clear about your expectations and theirs, you can avoid most conflicts.
    • Ask your roofing contractor if you should call to check on the progress or if he will call you with updates.
    • Be sure the roofing company service representative can reach you at all times while they’re reroofing your home or completing your roofing repairs. The work will move along more smoothly if your roofer can reach you for any necessary updates, questions or work authorizations.
    • When your contractor contacts you, return calls promptly to keep the roofing installation and repairs on schedule.
    • Pay for the roofing work promptly.

    Why would you want to be a good customer? Roofing contractors in San Mateo County appreciate customers who are straightforward, honest 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.
    Simplify the Job for Roofing Companies in San Mateo County
    Before the work has begun and while it’s in progress, keep in mind ways you can make the job easier for your roofing contractors. While the San Mateo County roofing contractors you’ve hired should be professionals who are able to deal with difficulties and unexpected situations during roof construction, you can take small steps to simplify the work. Not only will this create an atmosphere of cooperation and goodwill, but it can also save you money by preventing unnecessary delays and extra work.

    • Before the job starts, survey your property for any potential challenges that may make the job harder for the roofing contractors or that may add time to the job. This may include low hanging tree branches near the roofline, trees or shrubs that make it hard for the work trucks to enter your property or get close to the work site, or lawn furniture or ornaments that may be in the way of the roofing contractors. You may even want to plan a pre-work walk-through with the roofing company foreman to locate challenges they may see.
    • Keep children and pets away from the worksite. Not only is it unsafe for your loved ones to be near the construction site, it also can also add time to the job if the roofers need to be cautious to avoid injuring pets or children. If you have pets that use the yard near the roof construction area, take them out on a leash while the roof installation work is going on so that the roofers don’t need to worry about closing gates behind them.
    • Ask your San Mateo County roofing professional what you can do to simplify the job for them. In some cases, it may be easier for you to take care of tree trimming, roof cleaning or moving vehicles before the construction crews arrive and it may save you time and money in the long run.
    • Make sure your roofing company has contact information where they can reach you at all times, such as a cell phone or work phone number. This can limit costly delays if they need to reach you with updates, questions and authorizations for unforeseen situations.
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Check The Work
Check the Completed Roofing Installation Against Your Roofing Contract

Once your roof repairs or reroofing is completed, most good roofers in San Mateo County will give you a written invoice that lists the completed work. This invoice may include:

  • The name, business address and state license number of the roofing company.
  • A detailed list of all work performed.
  • An itemized list of roofing products and roof replacement parts used.
  • The total cost for the roof repairs or total reroofing, including the amount due for labor.
  • Written proof of all warrantees and guarantees provided by the roofing manufacturer and roofing installers.

To be sure that all the work lives up to your expectations and the agreed upon work order, ask your San Mateo County roofing contractor to walk through the job with you and show you the repairs and reroofing installation. Check the completed work against the invoice. This is the time to ask any final questions about the completed work and any additional information on maintaining your new roof.

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Written Warranties
Guarantees in Writing from San Mateo County Roofers

Before your roof contractor leaves the premises, ask for written proof of any warranties and guarantees they offer. Not all roofers back up their work. But if the roofer you’ve chosen does guarantee their work, they should give you the details in writing, including:

  • The roofing company name and physical address.
  • The work and products covered, including whether the roofing company will repair or replace the roofing products or give you a refund if you have a warranty claim.
  • Your responsibility if you file a warranty claim, such as if you have to pay for labor when filing a claim or pay a prorated amount for repairs.
  • The terms and limitations on your new roof warranties.
  • If the roof warranty coverage is transferrable to the new owner if you sell your home.
  • All exclusions must be in writing to be valid.
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Top 10 Requests
Popular Service Requests Offered By Good Roofing Contractors in San Mateo County

The top 10 requests for new roofs and roof replacements listed below are available in the larger San Mateo County cities of San Mateo, Redwood City, Daly City, South San Francisco, San Bruno, Pacifica, Menlo Park, East Palo Alto, Burlingame and Foster City and all of the smaller towns and West County. See the paragraphs below for the definition of each term.
Roof Shingle Installation
Roof shingles, including those made by Owens Corning, CertainTeed, IKO, Tamco, Celotex and GAF-ELK roofing, are a roofing choice made of individual, overlapping roof shingles. Most are laid in rows with the top shingles overlapping the lower shingles. Roofing shingles are typically made of asphalt, but can be metal shingles, stone shingles, tile shingles or wood shingles. Roof shingles come in a variety of colors and styles.
Steel Roof Installation
Steel roofs and stainless steel roofing is a good choice for harsh climates and as a design element for modern homes. Most steel roofs are installed as rolled roofing, standing seam roofs or metal shingles. Some steel shingles mimic the appearance of slate shingles, wood shingles and tile shingles with the strength and durability of steel roofing.
Roof Repair
Common roof repairs in San Mateo County including in the larger cities of Menlo Park, Daly City, San Mateo, South San Francisco, Redwood City, San Bruno are required to fix improperly installed gutters, roof leaks, missing shingles, roof flashing leaks, skylight flashing, roof valley flashing, roof ridge vent damage, gutter problems and nail holes. Most roofing contractors in San Mateo County provide emergency roof repairs and roof maintenance.
Flat Roofing Repair & Installation
Unlike sloping roofs, flat roofs are horizontal or nearly horizontal to the building. They may be residential or commercial roofs, and are often made of tar and gravel, rubber roofing, membrane roofing or metal roofing. Many buildings incorporate flat roofing so that they can support HVAC systems, living roofs/green roofs and living areas on the roof surface.
Roofing Tile Installation
Clay tiles, solar roof tiles, slate roof tiles, concrete roof tiles, plastic tiles, cedar tiles and ceramic tiles are all popular roofing tile choices in San Mateo County. They are long-wearing, unique and often sustainable roofing options. Roofing tiles are available in many styles, including flat tiles, imbrex and tegula tiles, Roman tiles, mission or barrel tiles, interlocking roof tiles, and interlocking pantiles.
New Roof Installation
New roof installations on new homes and existing structures are a complete replacement of existing roof structures. New roofs are recommended for existing homes that have leaky roofs that regular roof repairs won’t fix. New roofs are installed by roofing contractors and may include tile roofs, rubber roofs, shingle roofs, wood shingle roofs and metal roofs.
Roof Replacement Services in San Mateo County
Roof replacements are the removal and reroofing of an existing building. Roof replacement is an alternative to roof recovering, and is often called re-roofing or reroofing. Reroofing can change the shape or style of an existing roof, and may incorporate new roofing systems or roofing materials to update and add value to a home or building.
Rubber Roof Repair & Installation
Rubber roofing, often installed in rolled roofing form or liquid rubber roofing, is a specialized roofing cover for roof repairs or new roofing. Rubber roofs may be a good choice for roofs that leak or for flat roofs. Rubber roofs are often installed on commercial and industrial buildings, but are available as rubber roof shingles and recycled rubber roof tiles for residential homes.
Roof Panel Installation
Whether made of corrugated metal or translucent fiberglass, roof panels are good choice for homes, greenhouses and patio covers. Metal roof paneling comes in a variety of colors and styles. Roof panel installation is often quick and attractive, and the lightweight panels are a good choice for commercial or residential roofing.
Metal Roofing Installation
Metal roofing is a popular choice for its durability, flexibility and number of colors and styles. Once known as tin roofs, metal roofing is available as copper roofing, aluminum roofing, steel roofing, stainless steel roofing, corrugated roofing, standing seam metal roofing, metal shingle roofs and metal panel roofs. Metal roofing is weather resistant, lightweight and portable and is often used on residential buildings, commercial buildings and industrial buildings.

Common Roofing Brands in San Mateo County
The following roofing brands are some of the most popular roofing manufacturer products installed in San Mateo County, including in the major cities of Pacifica, East Palo Alto, Menlo Park, Daly City, San Mateo, Redwood City, South San Francisco, San Bruno, Foster City and Burlingame.

  1. Decra Roofing
  2. Monier Roof Tiles
  3. Gerard Roofing
  4. CertainTeed Roofing
  5. Sika Sarnafil Roofing
  6. Galvalume Metal Roofing
  7. Ondura Roofing
  8. GAF Roofing
  9. Firestone Roofing
  10. Duro-Last/DuraLast Roofing
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Glossary Of Terms
Glossary of New Roofing and Reroofing Terms

The roofing terms below will help you better understand the roofing construction and roofing repair process and will allow you to better communicate with your local roofing company.

aggregate roofing
Aggregate roofing is used as surfacing or ballasting for a roof system. Aggregate can be stone, rock, crushed stone, gravel, crushed lava rock or marble chips.

Also known as: aggregate shingles, built-up roof, built-up aggregate roof, roofing aggregates, aggregate rood systems

base flashing
Base flashing is the roof flashing that is created by the upturned edges of a roof membrane. Base flashing is usually attached to or resting on the roof deck and directs water onto the roof.

Also known as: roof flashing, base flashing detail, composition base flashing, copper base flashing, concealed base flashing, exposed base flashing, metal flashing, lead base flashing

built-up roof
A built-up roof is constructed with several layers of felt and asphalt. Each layer is topped with hot tar or asphalt. The topmost layer is covered with mineral or rock.

Also known as: builtup roofing, BUR roofing, built-up roofing membranes, built-up roofing systems, asphalt built-up roofs, gravel and tar roofing

corrugated roofing
Corrugated roofing is generally sheet metal roofing that has been folded into ridges. Corrugated roof panels are easy to install and easy to maintain.

Also known as: corrugated roof panels, corrugated roofs, clear corrugated roofing, corrugated metal roofing, corrugated rub roof, corrugated fiberglass roofing, corrugated plastic roofing

counter flashing
Flashing attached to a vertical surface that prevents water from seeping into the roof is known as counter flashing. Counter flashing is often used to waterproof the roofing around chimneys and pipes.

Also known as: counterflashing, chimney counter flashing, counter flashing detail, roof flashing

eaves flashing
Eaves flashing is an additional layer of roofing material installed at the roof eaves to prevent water damage from rain seepage.

Also known as: roof flashing, dormer flashing, ice flashing, water damage flashing, ice dam flashing, eave flashing, roof eave flashing, roof ice dam barrier

EPDM roofing
EPDM roofing is a synthetic rubber roof product made of ethylene propylene diene monomer. EPDM roofing is primarily a commercial roof covering that can withstand weathering, abrasion and extreme temperatures.

Also known as: ethylene propylene diene monomer, EPDM rubber roofing, rubber roof, rubber roofing

Horizontal trim at the eaves that covers the rafter ends is called fascia. Roof fascia runs horizontally across the ends of the roof rafters to form the edge of the roof. Fascia is placed above the soffit and below the roofline.

Also known as: roofing fascia, roof fascia, fascia board, house fascia, fascia trim

Roof flashing, usually made of metal sheeting or roll roofing, is installed to prevent rainwater from leaking into a building around joints or vents, pipes, chimneys, walls, dormers and roof valleys. Most roof flashing is made of galvanized steel.

Also known as: roof vent flashing, flat roof flashing, lead roof flashing, corrugated roof flashing, roofing flashing, roof detail flashing, vent pipe flashing

The upper part of a wall that comes to a point at the ridge of a sloping roof. The roof ends and walls create a V-shaped feature.

Also known as: gable roof, hip gable roof, gable roof dormer, dormer, cross gable roof, gambrel roof gable, reverse gable roof, gable roof style, gable roof truss

gable roof
Gable roofs are peaked, sloping roofs that form a gable at both ends.

Also known as: hip gable roof, gable roof dormer, dormer, cross gable roof, gambrel roof gable, reverse gable roof, gable roof style, gable roof truss

gambrel roof
Gambrel roofs have two sloping planes of different pitches on either side of the roof ridge. The lower plane of a gambrel roof has a steeper slope than the upper slope. Gambrel roofs have a gable at each end.

Also known as: gambrel angle roof, gambrel roof style

hip roof
A four-sided roof with sloping sides and ends is known as a hip roof.

Also known as: hipped roof, hip roof style, hipped roof style

interlocking shingles
Interlocking shingles are individual shingles that mechanically fasten together to provide stronger wind resistance.

Also known as: interlocked roofing, interlocking shingle systems, interlocking aluminum shingles, interlocking asphalt shingles, interlocking metal shingles, interlocking composite shingles, interlock shingles

laminated shingles
Strip shingles with more than one layer of tabs that create extra thickness are called laminated shingles.

Also known as: three-dimensional shingles, architectural shingles, laminated asphalt shingles, laminate shingles, laminated shingle, laminated roof shingles

mansard roof
A hip roof with two slopes on each side is referred to as a mansard roof. This type of roof contains two sloping planes with different pitches on each of the four sides. The lower sloping roof plane has such a steep pitch, it may appear vertical. Mansard roofs have no gables.

Also known as: French roof, straight mansard roof, flared mansard roof, double-slope roof

metal roofs
Metal roofs are found on commercial and residential buildings. Metal roofs are made from metal pieces, metal tiles or metal slabs. Metal roofs are resistant to weather and temperature changes and are known for their longevity.

Also known as: metal roofing, standing seam metal roofing, steel roofing, copper roofing, corrugated metal roofing, metal roofing panels, tin roof, metal roof shingles, metal fabrication roof, residential metal roofing, sheet metal roofing

Installing a new roof system over an existing roof without removing the existing roof is referred to as roof overlay. Roofing overlay is generally a more cost-effective way to install a new roof, since it doesn’t include costs of roof removal.

Also known as: roof recover, roof re-cover, vinyl roof overlay, metal roof overlay, roof-over

Constructing a roof on an existing building is referred to as re-roofing.

Also known as: reroofing, roof replacement, shingle replacement, residential re-roofing, reshingling, re-shingling, tear-off roof replacement

roll roofing
Roll roofing is a composition asphalt roofing and felt product manufactured in roll form. Roofing contractors install roll roofing by laying it in overlapping strips over the surface of the roof.

Also known as: rolled roofing, asphalt roll roofing, rubber roll roofing, rolled roof, smooth surface roll roofing, coated felt roofing

roof decking
Roof decking is thick lumber installed over the roof trusses and under the roof shingles or roof system. Roof deck provides the strength of the roof.

Also known as: roof deck, roof decking, tongue and groove roof decking, wood roof decking, metal roof decking, steel roof decking, roof decking tiles

roof vents
Roof vents provide air flow into a home’s attic or space beneath the roof. Roof vent caps are useful to keep debris and water out of the roof vents.

Also known as: attic vents, roofing vents, air vents, soffit vents, fascia vents, attic ventilation, roof exhaust vents, solar roof vents, ridge vents, gable vents, turbine roof vents, powered roof vents, roof air vents

self-sealing shingles
Self sealing shingles are made with thermal sealing cement that firmly seals the shingles together automatically after they have been set properly and warmed by the sun. In warm seasons, the self-seal will be set in a few days. In colder seasons, sealing time depends on the air temperature and the heat of the direct sunlight hitting the shingles. Many roofing contractors manually seal self-sealing shingle roofs that are constructed in winter to assure a firm seal.

Also known as: self-sealing roofing, pre-sealed shingles, sealing tab shingles

Roof shingles are overlapping pieces set on a roof to protect it from the elements. Roof shingles are commonly made of wood, slate, asbestos cement, bitumen, asphalt or ceramic material.

Also known as: roof shingles, roofing shingles, asphalt roof shingles, metal roof shingles, solar roof shingles, slate roof shingles, rubber roofing shingles, wood roof shingles, fiberglass roofing shingles

slate roofing
Roofing tiles and shingles made of slate rock are known as slate roofing. Slate roofs are durable, fireproof, weather resistant and unique. Synthetic slate roofing materials are also available. These synthetic slate shingles are lighter, easier to install and less expensive than genuine slate roofing.

Also known as: slate roof tiles, slate roof panels, natural slate roofing, flagstone slate roofing, synthetic slate roofing, faux slate roofing, composite slate roofing shingles

The exposed, finished underside of overhanging roof eaves. The soffit bridges the space between the siding and the roofline. Soffit can be vented to cool the attic space.

Also known as: aluminum soffit, vinyl soffit, soffit and fascia, soffit detail

solar roof
Roof panels, tiles and shingles with photovoltaic cells built in generate electricity much like traditional solar panels. Some solar roof shingles look just like asphalt shingles and are nailed directly onto the roof surface.

Also known as: solar roof tiles, solar roof panels, solar roof shingles, solar electric roofing, photovoltaic roofing, PV roofing

standing seam roof
Standing seam metal roofing is a method of installing metal roof panels vertically and side-by-side. On standing seam roofs, the roofing panels are attached at the sides with the overlapping area forming a seam between the roof panels. Standing seam roof panels are most commonly installed on commercial and industrial buildings, and are used to bring a modern look to residential roofing.

Also known as: metal standing seam roofing, standing seam metal roofing

TPO roofing
TPO or thermoplastic polyolefin roofing is a single-ply roofing membrane that is a heat-reflective and energy efficient roofing system.

Also known as: thermoplastic single-ply roofing, thermoplastic polyolefin roofing

Roof trusses are used in roof construction. They support the weight of the roof framing and roof deck.

Also known as: roof rafters, wooden roof trusses, roof supports, steel roof trusses, prefabricated roof trusses, prefab roof trusses, roofing trusses

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Frequently Asked Questions
Roofing Contractor FAQ

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

Q: Do I know if I need a new roof or roof repairs?
A: Good roofing contractors will inspect your roof and help you decide whether roofing repairs or a new roof is the best solution. Smaller areas of damage and minor leaks may be fixed with simple roof repairs. Extensive missing or damaged shingles, rotting roof boards, high energy bills, water stains on interior ceilings and walls or large roof leaks may indicate that a roof replacement is needed.

Q: What roofing materials can I choose from?
A: There are several types of roofing materials that are popular among local homeowners:

Asphalt shingles are a common choice for new roofs. They are reasonably priced, range from simple three-tab shingles to durable architectural shingles, come in many colors and types and are easy to repair. Asphalt shingles have a shorter lifespan (about 15 to 30 years) and aren’t as environmentally-friendly as some other roofing material choices.

Wood shingles and wood shake roofing are usually made from cedar wood. They often blend in with a natural environment, weather to an attractive grey color and are easy to repair and replace. Wood shingle roofing can last 30 to 50 years if it’s maintained properly. However, wood shingle and shake roofing can be expensive ton install and requires more maintenance than other types of roofing.

Tile roofing is a popular choice for new roofs because it is durable and attractive. Roof tiles can be made from concrete or clay and come in several colors and styles. Tile roofing is easy to maintain, fireproof and very durable. Tile roofing can be expensive, heavy and is generally a better choice for new homes because of the structural requirements due to the weight of the material. Tile roofing can also be fragile and repairs can be complicated.

Metal roofing, including copper roofs, steel roofing, aluminum roofing and tin roofs, is becoming a more common choice. While it can be expensive to install, metal roofing is very durable and will outlast other roofing materials. It is lightweight, comes in many colors and has a long lifespan—at least 50 years in most cases.

Slate roofing is a beautiful and unique choice. It is fireproof, low maintenance and lasts years longer than other roofing materials. However, slate roofing can be expensive, require specialized installation, and require more maintenance than other types of roofing.

Q: How do I know which type of roof is the best choice for my home?
A: Each home is different, just like the needs of the homeowners. Your roofing company can help you choose the best roofing material and roof style for your home, your budget and your unique wishes.

Q: How long will it take to re-roof my house?
A: Roof replacement can take a few days to several weeks depending on the size of the home and the roofing materials used. Weather and the skill and experience of the roofing contractors can also have an impact on the speed of the re-roofing process.

Q: Should I choose tear-off re-roofing or a roof-over roof construction?
A: Some roofing contractors will install a new roof on top of your existing roof, known as a roof-over or roof overlay. This can save some money on the roofing project since there are no costs for roof removal. However, other roofing companies recommend removing the old roof before installing the new roofing material, known as tear-off reroofing, for a better quality roofing job. Talk with your local roofer in detail about your specific reroofing needs.

Q: Are there eco-friendly roofing materials and methods I can choose from?
A: Yes. A new roof with good insulation can make your home more energy efficient and keep it more comfortable. There are also several ways to make your roof installation more eco-friendly. First, find out if your roofing contractor can recycle old roofing materials. Some roofing contractors dispose of old roofing shingles and materials in a more environmentally-sensitive way. It’s also possible to choose eco-friendly roofing materials for your new roof. From green roofs (roofs that are partially or completely covered with vegetation) and environmentally-friendly composite shake roof shingles to recycled shingles and metal roofing, there are many environmentally-friendly roofing options your roofer can offer.

Q: What happens if someone gets hurt while working on my roof?
A: When you hire legitimate roofing contractors with the correct license, liability coverage and workers’ compensation insurance, you won’t have to worry. Workers’ compensation insurance covers every employee of the company in the case of accident or injury. You will not be held responsible for damages. Make sure you ask your roofing contractor to show you a copy of their active workers’ compensation policy. All Diamond Certified roofers have had to prove they are licenses and carry worker’s compensation insurance in order to pass the Diamond Certified ratings process.

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