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?

This home has a new roof installed by a Diamond Certified roofing company. You'll feel confident hiring one of the professional roofers listed above because each has been rated Highest in Quality and has earned Diamond Certified. For more information on how to choose the right roofing contractor in Alameda County for you, read the following articles. Photo: Roofmax (2012) Topic: Finding High Quality Roofing Contractors in Alameda County

OAKLAND — 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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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.”

Read more

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

Agapito Chavez-Reyes is owner of PRI-Premiere Roofing Inc., a Diamond Certified company. He can be reached at (925) 453-6240 or by email.

Agapito Chavez-Reyes

diamond certified contributor profile and expert article

Agapito Chavez-Reyes: Life on the Roof

By James Florence, Diamond Certified Resource Reporter

LIVERMORE — Most people work a few different jobs before discovering their permanent livelihood, but for Agapito Chavez-Reyes, roofing is the only job he’s ever had. “I got into roofing at age 15, right after I first came to the U.S.,” he remembers. “I started out cleaning jobsites and carrying materials for the roofers, and I gradually worked my way up through the ranks. Several years in, while working as an officer for a roofing company, I encountered a situation where we neglected to do something for the client, but since I wasn’t the owner, I didn’t have the power to make it right. It was then I realized it would be better to start my own roofing business, so that’s exactly what I did.”

Today, as owner of PRI-Premiere Roofing Inc., Agapito says his favorite part of his job is working with homeowners. “I really like the sales side of the business because it gives me a chance to connect with our clients. I enjoy explaining the various products to homeowners and helping them find roofing systems that meet their needs.”

Originally from Michoacán, Mexico, Agapito resides today in Tracy. Outside of work, he enjoys spending time with his wife, Saida, and their son and daughter. “I like being spontaneous with family activities,” he says. “I’ll ask my daughter what she wants to do and we’ll just hit the road. We also like going to the beach and hiking and camping in the mountains.” When he’s not having fun with his family, Agapito can often be found reading up on the latest developments in the roofing industry.

In regard to a professional philosophy, Agapito describes the value that happy employees bring to a business. “I truly believe the only way we can have happy clients is by keeping our employees happy,” he says. “Some businesses put all their focus on making customers happy but neglect their employees’ needs. However, if your employees aren’t happy, they aren’t going to do their best work or serve customers as well, so customer satisfaction is going to go down. That’s why keeping our employees happy is number one for us.”

When asked the first thing he’d do if he were to retire tomorrow, Agapito says he’d invest in a beachside property. “My wife and I have a dream that will hopefully come true: to buy a house near the ocean. As I mentioned, we love the beach, so that would be our getaway house.”

Ask Me Anything!

Q: What’s your favorite local restaurant?

A: Maria Maria in Danville.

Q: Do you have a favorite movie?

A: I like movies set in historical times and places—like “Gladiator,” for example. I find history fascinating.

Q: Are you an early bird or a night owl?

A: An early bird.

Q: What’s your favorite holiday?

A: The Fourth of July. We love to go out and celebrate as a family.

Q: What’s your favorite family tradition?

A: Every time our family gets together, there are always tamales, menudo and pozole. Along with that good food comes good times.

Read more

How Roof Maintenance Prevents Leaks


LIVERMORE — There are a lot of reasons why roof maintenance is important, but the most significant is probably leak prevention. Whether you have a tile roof or an asphalt shingle roof, rainy weather can cause problems if it hasn’t… Read more

Attic Ventilation and Roof Lifespan


LIVERMORE — When it comes to roof replacement, one aspect that’s often overlooked is attic ventilation. While not as well-known as other roof components like shingles, attic ventilation is nonetheless crucial to ensure a roof reaches its maximum lifespan. That’s… Read more

Expert Video Tip

Video: Roof Leak Causes and Solutions

Complete Video Transcription:

LIVERMORE — Jairo Reyes: My name is Jairo, and I'm the Chief Operating Officer here at PRI, Premiere Roofing, Inc. As we near the rainy… Read more

Dave Lopez is owner of Advanced Roofing Services, Inc., a Diamond Certified company since 2003. He can be reached at (510) 592-4978 or by email.

Dave Lopez

diamond certified contributor profile and expert article

Dave Lopez: Roof Dreams

By James Florence, Diamond Certified Resource Reporter

ALAMEDA — When asked why he got into the roofing trade, Dave Lopez cites both a family connection and an entrepreneurial aspiration. “My dad was a roofer, so I became familiar with the trade early on,” he recounts. “After high school, I started working in the industry and climbed up the ladder from apprentice to journeyman, foreman, and then superintendent. My goal from day one was to have my own roofing business, which I achieved in 1998. I started out with a pickup truck, working out of my home, and from there I expanded into a shop and an office. After more than 40 years in roofing, I still love the smell of hot tar—it’s my cologne!”

Today, as owner of Advanced Roofing Services, Inc., Dave says his favorite part of his job (besides the scent of hot tar) is working with customers. “As company owner, I spend most of my time meeting with clients, doing sales presentations and providing estimates. I really enjoy figuring out what a customer needs and finding the right solution for them.”

Born and raised in Richmond, Dave resides today in Hayward, where he appreciates the mild bayside climate. “For a roofer, this is paradise. Since we’re right next to the bay, when the fog comes in and the breeze picks up, it’s like natural air conditioning. I once spent three months roofing in Los Angeles and it was terrible, so that really made me appreciate what we have up here.”

Outside of work, Dave spends his free time on a variety of hobbies and pastimes. “I’m big into classic cars and regularly attend car shows,” he details. “I just got back from a show in Pismo Beach, where I showed off my ’52 Oldsmobile Starfire.” Additionally, as a lifelong sports fan, Dave holds season tickets for the Oakland Raiders, the Oakland A’s, the Golden State Warriors and the Cal-Berkeley Bears. When he’s not at a car show or sports event, Dave enjoys spending time with his three grown children and five grandchildren.

In his life and career, Dave espouses the value of persistent positivity. “My main philosophy is to stay positive and keep moving,” he affirms. “In life, you’re going to run into roadblocks, and the only way to get to your destination is to push through. I’ve had plenty of those in my life, and maintaining a persistent, positive mindset is what got me to where I am today.”

When asked what he’d do if he were to retire tomorrow, Dave says he’d devote more time to the activities and people that matter most to him. “I’d spend more time with my kids and grandkids, as well as my cars. I’d definitely attend more car shows. These days, I do about 25 a year, but there are a lot more I could go to.”

Ask Me Anything!

Q: What was your first car?

A: A 1964 1/2 Ford Mustang—it came out halfway between ’64 and ’65. By the time I got it, it was about seven years old, so it wasn’t a big deal, but today it’s considered a classic.

Q: What kind of music do you like?

A: A little bit of everything, including R&B, classical, jazz and rock.

Q: Did you play any sports in high school?

A: I played baseball and ran track.

Q: Are you an early bird or a night owl?

A: An early bird—and I mean early. I’m usually up at 3:30am. That allows me to get a lot done before the day really gets going.

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

A: Italy.

Read more

The Impact of Roof Pitch on Roofing Material Selection


ALAMEDA — Tar and gravel roofs have been around for a long time, but in recent years their popularity has waned. This is largely due to aesthetics, with many homeowners choosing to replace their tar and gravel roofs with composition shingles because… Read more

Expert Video Tip

Video: Roof Maintenance Tip

Complete Video Transcription:

Host, Sarah Rutan: To keep your roof in good condition, you’ll need to invest in ongoing maintenance. Today we’re in Alameda with Diamond Certified Expert Contributor… Read more




  • CertainTeed

  • Owens Corning

  • GAF

  • Malarkey

  • Eagle Tile

  • Boral

  • Monier

  • HydroStop

  • IKO

  • Tropical

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
Georgia-Pacific Roofing
EPDM Roofing
Duro-Last Roofing
Carlisle Roofing
Tremco Roofs
Garland Roofing
Suprema Roofing
Malarkey Roofing
John Manville Roofing
Custom-Bilt Roofing

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
roof coating application
membrane roof
wood shake roofs

Castro Valley
Komandorski Village
Mount Eden
Russell City
San Leandro
San Lorenzo
Union City


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 You Want From Your New Roof and Alameda Roofing Contractors

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 qualities you’re looking for in a roofing company. Some homeowners find it helpful to write down questions and keep a file of ideas. 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 reroofing?
  • Is there a specific roof color or material I’m interested in? (Such as tile roofs, metal roofing, copper roofs, traditional roof shingles, wood shake roofing, etc.)
  • 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, dormers, a narrow driveway that may be too small for supply trucks, a short timeframe, etc.)?
  • What characteristics do I want in an Alameda 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 Alameda County Including Those in the Major Cities of Oakland, Fremont, San Leandro, Hayward and Berkeley
If you have a list of questions to ask the roofing contractors you interview, you’ll get better results. Prewritten questions will keep you on track and ensure you ask questions that are most pertinent to the accomplishment 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 Alameda County for you.

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What To Ask In Person
Interview Questions to Ask Professional Roofing Contractors in Person

The following questions are those you should ask of any local roofing contractors you’re considering hiring. This is best done in person, after you’ve had a chance to narrow your list through telephone interviews.

Invite each of the stand-out roofing companies to send a representative to your home. This will give them a chance to see your home, review the damage or current roof in person, and give you an estimate based on your specific needs.

The following questions will get you started:

  • How much time will the roofing job take, from ordering the new roof materials to completion of new roof installation/roof repairs?
  • Will I be able to stay in my home during the roofing installation or roof repairs?
  • Will my new roof be more energy efficient than my current roof?
  • Have you completed roofing projects in my area of Alameda County where I can see how the roof installations look from the street?
  • Do you have recent customer references I can call who hired you for work similar to what I need?
  • How would I handle future service issues? Are you responsible for warranty work if there’s a problem with my new roof or roofing repairs?
  • 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 Alameda County

    It’s best to choose Diamond Certified roofers because all certified companies have passed an in-depth ratings process that most other companies can’t. If you want quality from a roofing contractor in Alameda County and the greater Bay Area, you will 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 because all research is performed in live telephone interviews of real customers.

    If you can’t find a Diamond Certified roofing company within your area of Alameda County and the Tri-Valley, you’ll have to do some research on your own. If you do, it’s wise to call references.

    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 are usually not randomly selected from all of a company’s customers. So the contractors will likely give you a few customers to call that they know are satisfied.

    If you do call references, specifically ask for a list of the roofing company’s 10 most recent customers to help avoid them giving you only the names of 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, weatherproofing, roof leak repairs, etc.)?
    • Did the Alameda 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?
    • If you live in a smaller town such as Albany, Castro Valley, Newark, San Lorenzo or Sonol, did the roofers charge you extra to travel to your home?
    • Did the roofing company employees show up on time?
    • Did the roofers clean up after finishing the roofing 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 see your new roof installation or roof repairs?
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  • Review Your Options
    Final Steps to Hiring a Good Roofing Contractor

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

    Your roofing contractor will determine the quality and value of your new roof, which will be your first line of defense against water damage from rain or storms. A good roof can even impact the resale value of your home.

    So prior to deciding on the best roofers in Alameda County for you, it’s important to review the notes you took during your interview process and ask yourself the following questions:

    • Can the roofing contractors you interviewed meet your needs in terms of scheduling, products and installation preferences?
    • Are the Alameda County roofers I spoke with knowledgeable on the new roofing 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 replacement, aluminum roofing, corrugated roofing, membrane roofing products, ceramic tile roofing, wood shingles, etc.)?
    • Is the roofing installation company sensitive to your budget? Can they offer various products that fit your resources?
    • Do the roof contractors in Alameda County offer written warranties that protect you in the event of a product failure or installation error?

    You may also want to examine your expectations for your new roof, keeping in mind what may not and may be possible. For instance, when having a new roof installed, it might not be reasonable to expect an continuous schedule or a quiet worksite.

    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
    Get Honest Roof Repair Estimates from Alameda County Roofers

    The best roofing contractors in Alameda County, including those in the larger cities of Oakland, Dublin, Newark, Pleasanton, Berkeley, San Leandro, Fremont, Union City, Hayward and Alameda and even some in the smaller towns like Ashland, Cherryland, Emeryville, San Lorenzo and Russell City, can be selective about which roofing jobs they take. That’s because not every roofing company can handle every kind of roof repairs or roof installation. 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 of the best roof contractor candidates. Roofers appreciate knowing that customers are looking for good service and fair prices rather than cheap roofing. This will also improve your chances of finding a quality roofer who really understands the trade and provides the best quality workmanship.

    Get Comprehensive Roofing Contracts from Alameda County Roofers
    Now that you’ve found a good roofing contractor to hire, it’s the perfect time to ask for a written contract that outlines your roofing job details. The contract should include the cost, the materials to be used 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 an Alameda 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 will protect both you and your roofing contractor. So it’s advisable to write in any verbal agreements or special requests. 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 your roofer’s responsibility install quality roofing products using the best installation techniques. But you play a big part in the success of your new roof, too. By being a good customer, you can simplify the process and help limit some of the common pitfalls of roof replacement or reroofing services.

    Here are a few simple steps you can take to be a good customer when hiring Alameda County roofing contractors.

    • Be clear and upfront with the roofers. Tell them what you expect from your new roof, the long-term outcome you want and specific ways they can satisfy your hopes.
    • Restate your expectations and goals, and reiterate to the Alameda roofing company representative your understanding of the agreement. Most problems with local roofers occur because of a breakdown in communication. Being clear about your expectations and theirs can help you avoid most conflicts.
    • Ask your roofing contractor if you should call to check on the progress or if he will call you with regular updates.
    • Be sure the roofing company service staff 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 with updates, questions or for work authorizations.
    • When your contractor contacts you, return calls promptly to keep the roofing installation and repairs on schedule.
    • Pay for the roofing installation or roofing repairs on time.

    Why would you want to be a good customer? Roofing contractors in Alameda County are pleased with customers who are honest and easy to work with. Your good manners set the path of the work from your end and create an environment favorable to a good relationship. Things will most likely go well and any problems may be more easily resolved.

    Simplify the Job for Alameda County Roofing Companies
    Before and while the work is in progress, keep in mind ways you can simplify the job for your roofing contractors. While the Alameda County roofers you’ve hired should be professionals who are able to deal with difficulties and unanticipated circumstances during roof construction, you can take small steps to ease the work. Not only will this create an atmosphere of collaboration, it will also save you money by preventing unnecessary delays.

    Before the job starts, survey your property for potential challenges that may make the job harder for the roofing contractors and that may add time to the job. This can include tree branches near the roofline or barriers that make it hard for the work trucks to enter your property, or lawn furniture 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 potential hazards.

    Keep children and pets away. 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 watch out for pets and children. If you have pets that use the yard near the roof construction area, take them out on a leash for the duration of the work so that the roofers don’t need to worry about closing gates behind them.

    Ask your Alameda County roofing professional what you can do to simplify the job. 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.

    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
Compare the Completed Roofing Work to Your Agreement

Once your roof repairs or reroofing is completed, most good roofers in Alameda County will give you a written invoice that lists the roofing services you are being billed for.

For your protection and that of your roofing contractor, this invoice should include:

  • The roofing company name, business address and state license number.
  • A detailed list of all roofing work performed.
  • An itemized list of roofing products and 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 work order, ask your Alameda County roofing contractor to walk through the job with you and show you the finished work so you can check it against the invoice.

This is the time to ask any questions about the work and maintaining your new roof. Any discrepancies may be harder to remedy once the roofing contractor has received final payment and left the premises.

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Written Warranties
Get Written Warranties from Alameda County Roofers

Before your roof contractor leaves the premises, ask for written proof of warranties and guarantees.

Not all roofers back up their work. But if the roofer you’ve chosen does, they should be willing to give you the details in writing, including these items:

  • The roofing company name and physical address.
  • Their state contractors license number.
  • 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.
  • Any terms and limitations.
  • If the roof warranty coverage is transferrable to the new owner if you sell your home.
  • All exclusions must be in writing.
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Top 10 Requests
Top Service Requests of Roofing Contractors in Alameda County

The top 10 requests for new roofs and roof replacements listed below are available within Alameda County including the main cities of Oakland, Alameda, Berkeley, San Leandro, Union City, Fremont, Hayward, Pleasanton, Newark and Dublin.

Metal Roofing Installation
Metal roofing is a popular choice for its durability, flexibility and available colors and styles. Sometimes called 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 panels. Metal roofing is weather resistant, lightweight, portable and is often used on residential, commercial 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 slate, wood and tile shingles with the strength and durability of steel roofing.

Roof Repair

Common roof repairs in Alameda County fix improperly installed pipes and 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 Alameda County provide emergency roof repairs and roof maintenance.

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 roof shingles that overlap. Most are laid in rows with the top shingles hanging over the lower shingles. Roofing shingles are typically made of asphalt, but can be metal, stone, tile or wood. Shingles come in a variety of colors and styles.

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 Alameda 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 replacements are the removal and reroofing of existing roofs. 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 panels comes in a variety of colors and styles. Roof panel installation is quick and attractive, and the lightweight panels are a good choice for commercial and residential roofing.

Top 10 Roofing Brand Requests in Alameda County
The following roofing brands are some of the most popular roofing manufacturer products installed in Alameda County.

  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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