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

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  • Our editors gather deep company info.
  • Performance is Guaranteed.

Diamond certified companies are top rated and guaranteed

Why Trust Diamond Certified Roofing Companies Rated Highest in Quality?

SAN RAMON—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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Mike Creeden is owner of Marco Roofing, a Diamond Certified company. He can be reached at (925) 405-5996 or by email.

Mike Creeden

diamond certified contributor profile and expert article

­­Mike Creeden: A Twofold Education

By James Florence, Diamond Certified Resource Reporter

FREMONT — During his college years, when Mike Creeden wasn’t studying for his classes, he could often be found working on a rooftop. What he didn’t realize was that both activities were preparing him for his future career. “While earning my degree in business administration, I worked for my uncle’s roofing business on the side,” he remembers. “After I finished college, my uncle asked me to run his company for him. It was the best opportunity I had at the time, and between my college degree and my roofing experience, I was qualified for the job, so I took it.”

Five years later, in 1975, Mike decided it was time to strike out on his own and founded Marco Roofing. Today, after more than four decades in business, Mike says his favorite part of his job is the customer interaction. “I enjoy meeting new people and working with them to achieve their goals. It’s very satisfying to see my clients happy at the end of their jobs.”

A resident of Pleasanton (where he lives with his wife, Lynette), Mike spends his time outside of work on a variety of active pastimes. “I have a Harley-Davidson that I ride all over the western United States,” he details. “I also play golf regularly and enjoy working in my garden.” When he’s not engaged in one of his personal hobbies, Mike enjoys spending time with family. “Lynette and I have two children and six grandchildren, so family is a big part of our lives.”

After nearly a half-century in the roofing business, Mike reflects on the core value of his career. “To me, being a roofer is primarily an opportunity to help people,” he affirms. “The same goes for any job in the service industry. It doesn’t matter if you’re a plumber, an electrician or a swimming pool technician—at the end of the day, the goal is to help someone in need. That’s why I’ve always put my clients first and made a priority of meeting their needs.”

When asked the first thing he’d do if he were to retire tomorrow, Mike says he’d spend more time on his hobbies…and maybe add a few more. “I would play more golf, ride my Harley more often and do some more traveling. I’d also probably try my hand at some new things. For instance, I’d like to get better at cooking.”

Ask Me Anything!

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

A: Peru. I’ve always wanted to see Machu Picchu.

Q: What’s your favorite book?

A: “The Light and the Glory” by Peter Marshall.

Q: What kinds of music do you like?

A: Country and jazz.

Q: What’s your favorite snack?

A: Chocolate chip cookies.

Q: What’s the best gift you’ve ever received?

A: When I turned 50, my wife surprised me with a brand-new Harley-Davidson. It was the biggest shock ever!

Read more

The Proper Way to Walk on a Tile Roof


FREMONT — Whether to hang Christmas lights, wash upper-story windows or retrieve a wayward ball lost by the neighborhood kids, it’s inevitable that you’ll need to get up on your roof at some point. Naturally, safety should be your main priority when… Read more

Expert Video Tip

Video: How to Walk on a Tile Roof

Complete Video Transcription:

FREMONT — Host, Sarah Rutan: When getting up on a tile roof, knowing the correct way to walk on it can prevent damage to the roof tiles. To… Read more

Tom Rhoads is a 33-year veteran of the roofing industry and president of Roof-Life Construction, a Diamond Certified company. He can be reached at (925) 338-7472 or by email.

Tom Rhoads

diamond certified contributor profile and expert article

Tom Rhoads: Roofer for Life

By James Florence, Diamond Certified Resource Reporter

SAN RAMON — When Tom Rhoads first got involved in the roofing industry, he was merely looking for a way to supplement his income…little did he know it would lead to a lifelong career. “I was 18 years old, working at a grocery store, when my hours were unexpectedly cut back,” he remembers. “To make ends meet, I started working with my neighbor, who was a roofer. I always liked being outside, so the work really suited me, and I ended up sticking with it. After a couple of years of training, I struck out on my own, and 32 years later, I’m still at it.”

Today, as owner of Roof-Life Construction, Tom says his favorite part of his job is the opportunity to make a positive impact. “We do a lot of energy-saving measures like installing solar panels and improving roof ventilation. Besides helping our clients save money on their energy bills, we’re also able to help the environment, so it’s very rewarding.”

Tom is a resident of Dublin, where he lives with his wife, Sheila. Outside of work, he likes to spend as much time as possible immersed in the great outdoors. “We have a cabin near Yosemite National Park, so we spend a lot of time up there, hiking and enjoying nature,” he says. Tom also enjoys playing volleyball at the beach and coaching soccer at Dublin High School. Additionally, he takes time to keep up with his and Sheila’s three children. “One of my sons is currently attending the University of Reno, another is at Arizona State and my daughter will be starting at UC Santa Barbara this fall.”

When asked the first thing he’d do if he were to retire tomorrow, Tom says he’d tackle some long-deferred home projects. “I’d probably get started on my to-do list. I have quite a few projects around the house that need to be done, so if I stopped working, I’d finally have some time to get to them.”

Ask Me Anything!

Q: What are your favorite sports teams?
A: The San Francisco Giants, the San Francisco 49ers and the Golden State Warriors.

Q: Music or talk radio?
A: Music.

Q: What’s your favorite style of music?
A: Rock. I also like rhythm and blues.

Q: What’s your favorite snack?
A: Pizza.

Q: What was your favorite Halloween costume as a child?
A: G.I. Joe.

Read more

Maintaining a Tile Roof


SAN RAMON — If your home has a tile roof, annual maintenance is critical for ongoing performance. While simply keeping your roof clear of debris will go a long way toward avoiding problems, there are other, more specific aspects of maintenance… Read more

Expert Video Tip

Video: Tile Roof Maintenance

Complete Video Transcription:

SAN RAMON — Host, Sarah Rutan: If your home has a tile roof, make sure you’re aware of its specific maintenance needs. Today we’re in San Ramon… Read more

Michael Wakerling is a 44-year veteran of the roofing industry and owner of General Roofing Company, a Diamond Certified company since 2002. He can be reached at (510) 761-5937 or by email.

Michael Wakerling

diamond certified contributor profile and expert article

Michael Wakerling: The Old-Fashioned Way

By James Florence, Diamond Certified Resource Reporter

OAKLAND — As the third-generation owner of General Roofing Company in Oakland, it’s no surprise that Michael Wakerling has been immersed in the roofing industry throughout his entire life. “My grandfather started the business back in 1924 and it’s been in the family ever since,” he says. “When I was a little kid, I used to go to work with my dad on weekends, and over time I just gravitated toward the trade.” Mike’s deep industry roots also explain his commitment to upholding the old-fashioned service approach his grandfather originally instilled in the company. “My grandfather had a set of rules that he did business by, and we’ve tried to keep those rules with us. I think that’s one of the reasons we’ve been able maintain our loyal customer base over the years, including relationships that span multiple generations.”

A lifetime East Bay resident, Mike was born in Castro Valley and later settled in Livermore, where he lives today. Outside of work, he enjoys being outdoors, whether fishing in the mountains or spending a day at the beach in Carmel. In addition to personal hobbies, Mike keeps up with his sons, Matt and Shane, and makes frequent trips to Texas to visit his daughter, Laura, and grandson, Ethan.

In his life and career, Mike says he adheres to the age-old Golden Rule. “I always try to treat people how I like to be treated. People deserve to be regarded with respect and dignity, which is why, when dealing with customers, I try to be as upfront and honest as possible to ensure there are no surprises while we’re working on their roofs.”

As he draws nearer to retirement, Mike says he looks forward to passing his business down to its fourth generation of family ownership. “My son, Shane, works with me and is going to take over when I retire.” When asked one thing he’ll do after that takes place, Mike says he’ll likely take a vacation to trace some of his family roots. “I think I’ll head to Switzerland, because that’s where my grandfather immigrated from. We still have some distant relatives there, so I’d like to go see where my family came from.”

Ask Me Anything!

Q: What’s your favorite restaurant?
A: Italian Colors in Oakland.

Q: Have you ever had a conversation with a famous person?
A: I met Ricky Henderson, the former Oakland A’s outfielder, when we re-roofed his mother’s house. This was back when he was still playing, and he actually set us up to watch a game in his personal luxury box at the stadium.

Q: What’s your favorite dessert?
A: Key lime pie.

Q: If you had a theme song, what would it be?
A: “Margaritaville” by Jimmy Buffet.

Q: What’s your favorite newspaper comic strip?
A: “Marmaduke.”

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Considerations for Roofing System Design


OAKLAND — Planning to replace your roof? If so, you’ll want to make sure your new roof meets your specific needs and preferences. Here are a few considerations to make when designing a roofing system: Long-term plans How long do… Read more

Achieving Title 24 Compliance With Your Roof


OAKLAND — California’s Title 24 energy code now extends to residential roofing, with specific requirements for both flat and sloped roofs. For this reason, if you’re planning to replace your roof in the near future, you’ll need to ensure it… Read more

Essential Roof Maintenance


OAKLAND — Like your car, your roof is one of your most valuable assets, and as such, it requires ongoing maintenance to reach its maximum life expectancy. However, the type of maintenance needed depends in part upon what type of roof you… Read more

The Benefits of Systematic Roofing


OAKLAND — When it comes to roof replacement, many homeowners opt to take the least expensive route possible. However, a much more cost-effective option is to take a systematic approach. Far more than just installing new shingles, a systematic approach… Read more

Expert Video Tip

Video: Preventative Roof Maintenance

Complete Video Transcription:

OAKLAND — Host, Sarah Rutan: Though often overlooked, preventative maintenance is essential for the life of every roof. Today we’re in Oakland with Diamond Certified Expert Contributor… Read more




  • CertainTeed

  • Owens Corning

  • GAF

  • Malarkey

  • Eagle Tile

  • Boral

  • Monier

  • HydroStop

  • IKO

  • Tropical

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

commercial roofing
roof panel replacement
roof leak repair
steel roofing
steel roofing
aluminum roofing
asphalt roof
copper roof installation
corrugated roofing
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

Bay Point
Bethel Island
Discovery Bay
El Cerrito
El Sobrante
Hilltop Mall
Los Medanos
North Richmond
Pleasant Hill
Point Richmond
Port Chicago
Port Costa
Rheem Valley
San Pablo
San Ramon
Tara Hills
Vine Hill
Walnut Creek
Walnut Heights
West Pittsburg


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 Qualities You Want In a New Roof and From Local Roofers

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 will roof repairs suffice?
  • What is my budget for a new roof/roofing repairs?
  • Is there a specific roof color or material I’m interested in?
  • Are there any factors that may make my roofing project more complicated? If so, talk with your potential roofer about them so they can be taken into account during the planning. Examples may include an unusually steep roof, dormer windows, a narrow driveway or limited parking, a tight schedule or repairs that need to be done during winter.
  • What characteristics and qualities do I prefer in my Contra Costa County roofing contractor? This are timeliness, reliability, availability of emergency roofing repair services, good communication skills, etc.
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What To Ask In Person
Questions to Ask Contra Costa County Roofing Contractors in Person

After you’ve located a few roofing companies that were able to answer your telephone interview questions satisfactorily, invite a couple of the standouts to visit your home and bid on your roofing job. When they’re on the premises, take the time to ask a few questions including these:

  • How much time will the job take, from ordering the new roof tiles or shingles through installation?
  • Will I be able to lige in my home during the reroofing?
  • Is this new roof more energy efficient? Will it reduce my heating and cooling bills?
  • Do you have any recently-completed projects in my area of Contra Costa County where I can see how the roof installations look from the street? Are there any local jobs you completed years ago that I can visit and see how well they’ve held up?
  • Will you give me a list of 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 Experience with Local Roofers

    It’s safer 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 roofing contractor in Contra Costa 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 roofing 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 roofing company. Keep in mind, though, that references provided to you by the roofers 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. 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 service from _(roofing company name)_?
    • What was the type and scope of roofing services they did for you?
    • Did the Contra Costa County roof contractor you hired finish 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?
    • If you live in a smaller town such as Walnut Heights, Blackhawk, Port Richmond, Briones, Canyon, Port Chicago or Clyde, did the roofers charge an extra fee to travel to your home?
    • Did the roofing company show up on time?
    • Did they clean up after finishing the roof 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
    Tips to Hire a Good Roofing Contractor in Contra Costa County

    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 consider the following questions:

    • Can the roofing contractors meet your needs in terms of scheduling, products and installation preferences?
    • Do the Contra Costa County roofers have knowledge of the roofing products they sell and install?
    • Can the company contact tell you which roofing services and roof products best suit your needs and why (i.e. roof repairs, roof panel replacement, aluminum roofing, corrugated metal roofing, membrane roofing products, roof leak repair, ceramic tile roofing, cedar shake shingles, etc.)?
    • Is the roofing installation company sensitive to your budget? Most contractors will give you bids for good, better and best options that are flexible to fit your resources.
    • Do the roof contractors in Contra Costa 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, it may not be reasonable to expect an uninterrupted schedule or a quiet worksite when getting a new roof.

    So talk with your roofing contractor about what you can reasonably expect during the work. You are more likely to be satisfied if you go into the job with fair expectations.

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  • How To Work With
    How to Get Honest Roofing Estimates from Contra Costa County Roofers

    The best roofing contractors in Contra Costa County, including those in the larger cities of Pittsburg, Martinez, Richmond, Concord, Antioch and Walnut Creek can be choosy about which roofing jobs they take. That’s because not every roofing company can handle every type of roofing repair or roof installation. So it’s vital to look for the high-quality roofing contractors that have the skill and knowledge to do the roofing work you’re looking for.

    Once you’re narrowed down your choices by interviewing roofers, 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.

    Sign a Detailed Roofing Contract with Your Contra Costa County Roofer
    When you’ve found the roofing contractor that meets all of your expectations, it’s the ideal time to ask for a written contract. The contract should include the cost of the job, details about the materials and installation information, such as 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 Contra Costa 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 Contra Costa 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 Contractor Customer?

    It’s the roofer’s job to 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 easy ideas that will help you be a good customer when hiring Contra Costa County roofing contractors.

    • Be clear and upfront with the roofers. Let them know what you want from your new roof, the outcome you’re expecting and specific ways they can meet your expectations.
    • Before you hire a roofing contractor, repeat your expectations and reiterate to the roofing company representative your understanding of the agreement. Most problems with local roofers occur because of a failure 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 the company will call you with regular updates.
    • Give the roofing company service representative a phone number where they can reach you at all times while reroofing your home or completing your roofing repairs. The work will move along more smoothly and your roofer will be able to call you for necessary updates, questions or work authorizations.
    • When your contractor contacts you, return calls promptly.
    • Pay for the roofing work as promised in your contract.

    Why would you want to be a good customer? Roofing contractors in Contra Costa 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 Contra Costa 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 Contra Costa 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.

    Clear the area. Before the job starts, survey your property for potential hazards and items that may make the job harder or add time to the job. This includes low hanging branches near the roofline, trees or shrubs that make it hard for the work trucks to enter your property or pull up to the work site, or lawn furniture or decorations that may be in the way. 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. It is unsafe for your loved ones to be near the construction, and it also can also add time and expense to the job if the roofers have to watch out for pets or children. If your pets use the yard near the roof construction area, take them out on leash during the roof installation work in case the roofers forget to close gates or need to leave open yard access.

    Ask what you can do. Your Contra Costa County roofing professional should be able to tell you if there are any items you can take care of in order to simplify the job. In some cases, it may be easier and less expensive for you to handle tree trimming, roof cleaning or moving vehicles before the construction crews arrive.

    Stay in touch. Make sure your Contra Costa roofing company has contact information so 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 Repairs and New Roof Installation

Once your roof repairs or reroofing is completed, most good roofers in Contra Costa County will give you a written invoice for completed work.

This invoice may include:

  • The roofing company’s name, business address and state license number.
  • A comprehensive list of all work performed.
  • An itemized list of roofing products and roof replacement parts used.
  • The total cost, 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 Contra Costa 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
Get Written Warranties from Contra Costa County Roofers

Before your roof contractor leaves the premises, ask for a written warranty. 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 or pay a prorated amount for repairs.
  • 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
Top Service Requests of Roofing Contractors in Contra Costa County

The most popular roofing services listed below are available in the larger Contra Costa 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.

Flat Roofing Repair & Installation
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 Contra Costa 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
Roof replacement is the total 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
Roof panels are often made of corrugated metal or translucent fiberglass, and they 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.

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
Most roofing contractors in Contra Costa County provide emergency roof repairs and roof maintenance. Other common roof repairs in Contra Costa County including in the larger cities of Brentwood, Concord, Richmond, Walnut Creek, Antioch, Pittsburg 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.

Top Roofing Brand Requests in Contra Costa County
The following roofing brands are some of the most popular roofing manufacturer products installed in Contra Costa County, including the major cities of San Ramon, Danville, Brentwood, Concord, Richmond, Antioch, Walnut Creek, Pittsburg, Martinez and Pleasant Hill.

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