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  • Deep Info™

    Researched company reports.
    Essential articles and videos by topic experts.

BROWSE BY MAJOR CATEGORIES
WHY CHOOSE A DIAMOND CERTIFIED COMPANY?
Watch this video on the Diamond Certified Resource: the most accurate and trustworthy way to find local companies rated Highest in Quality and Helpful Expertise®. Companies must score 90+ on a 100 scale and pass all our credential-based ratings. By requiring such a high score to qualify, we cut out mediocre and poorly performing companies. Only the Best Pass the Test®.
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We’ve all felt the joy of choosing a good local company and, unfortunately, the pain when we mistakenly choose a bad one. The problem is, every company claims to be good, yet despite these glowing claims some provide inconsistent quality while others are downright unscrupulous.

The Diamond Certified Difference

We’ve solved this problem for you with the Diamond Certified Resource. Only local companies independently rated Highest in Quality and Helpful Expertise® earn Diamond Certified. Our rigorous rating and certification process starts with the in-depth pass/fail rating of each company’s customer satisfaction, license and insurances. Most companies can’t pass our rating and earn Diamond Certified, and every Diamond Certified company must continue to deliver on its promises to you, the consumer. That’s why we conduct ongoing customer satisfaction research and credential-based ratings and monitor each company’s performance.

We’re Here for You

Every Diamond Certified company is backed by our powerful Performance Guarantee, so you’ll feel confident in your choice when you use our always-free web resource or Diamond Certified Directory. If you try unsuccessfully to resolve a disagreement with a Diamond Certified company, our mediator will work with you and the company to attempt to reach an agreement that both parties can live with. If the mediation fails to produce a mutually agreeable solution due to failure of the Diamond Certified company to honor contractual obligations, uphold industry standards or participate in good faith, we will refund your purchase price up to $1,000.

Each time you visit diamondcertified.org, you’ll see each Diamond Certified company’s Deep Info, including researched company rating reports, verbatim survey responses, essential articles, photo galleries, videos and expert tips. We put all the information you need to choose a company in one place, and no other web page can match this depth of information.

Only the Best Pass the Test®

When you choose a Diamond Certified company, you’ll never be fooled by fake or cherry-picked reviews because we survey a large, random sample of each company’s customers by telephone (typically 100 surveys) to get the most accurate ratings and verify only real customers are responding. Company owners can’t cherry-pick by telling friends and selected customers to post 5-star reviews on our site—we don’t allow it.

So, if you want quality, you’ll have confidence in choosing a Diamond Certified company. We encourage you to visit this website on a regular basis to find updated ratings on top rated companies in your area, see verbatim survey responses on each Diamond Certified company, and read thousands of industry-specific expert articles and tips. We care about customer satisfaction, and we care about you. We’re proud to give you all the information you need to choose with confidence.

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WHAT’S IN EACH DIAMOND CERTIFIED COMPANY REPORT?
SAMPLE COMPANY REPORT

Each Diamond Certified Company Report gives you the most accurate and comprehensive Deep Info available for each company. It includes proof of Diamond Certified status, rating charts, verbatim survey responses, essential articles about the company, a capabilities table, a Diamond Certified Video Profile, key photos, company owner expert tip contributions and more. Click on the graphic to learn more

  • ACCURATE RATINGS

    We survey a large, random sample of each company’s customers by telephone to get the most accurate ratings...

    VERBATIM SURVEY RESPONSES

    In addition to providing rating scores for Quality, Intent to Return and Helpful Expertise®, each surveyed customer is...

    VIDEO PROFILE

    You get to see the company in action, meet the managers, and learn as they describe their specialties and customer...

    ESSENTIAL ARTICLES

    You can choose to scan or go deep into these five researched articles on each Diamond Certified company: Company...

    CAPABILITIES TABLE

    Each company’s key info is logically organized within this table. You’ll find this system of display gives...

    TOPIC-BASED EXPERT CONTRIBUTIONS

    Top rated local company owners are experts in their fields, and they’ve written topic-based expert articles and created...

    PHOTO GALLERY

    If a picture is worth a thousand words, how about an entire portfolio? You’ll get a better sense of each company once...

    COMPANY WEBSITE & EXTERNAL FEED

    This is a good place to go if you want to do extra research on a company. Here you’ll find a link to each company’s...

DIAMOND CERTIFIED CONSUMER INFORMATION AND RESOURCES
DIAMOND CERTIFIED BLOG
Thanksgiving 365: Improving Your Life Through the Practice of Gratitude

Posted on November 24, 2020 by James Florence

thanksgiving cornucopia

 

Given the hardships so many of us have experienced this year, the idea of giving thanks can be a tough pill to swallow. The fact that many families will spend this Thanksgiving separated from their loved ones further underscores this. However, in difficult times like these, it’s all the more important for us to identify the good in our lives and express our gratitude. While 2020 is certainly not a year of abundance, we nonetheless have plenty to be thankful for, even if it’s not immediately obvious. In the spirit of such persevering gratitude, we’re resharing this post from last Thanksgiving. We wish you all a safe and happy holiday. Read more

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Posted in: Holiday Related

Diamond Certified DIY: How to Paint a Door

Posted on November 17, 2020 by James Florence

Do you have a door in your home that needs to be repainted? While there are professional companies that will do this for you, it’s also something you can do yourself if you’re DIY-inclined. However, painting a door isn’t as simple as it may seem—to achieve a successful result, you’ll need to use the right tools and techniques. Follow these steps: Read more

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Posted in: Painting, DIY Home Repair
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Diamond Certified Experts: Preparing Your Home Exterior for Winter

Posted on November 10, 2020 by James Florence

After a seemingly endless summer, the Bay Area is finally getting some authentic autumn weather, with cooler temperatures and rain on the horizon. As we close out a year marked by extreme weather, it’s anyone’s guess what winter will bring, which is why residents should be prepared for anything, including excessively cold and wet conditions. If you’re a homeowner, this means making sure your home is in adequate shape to withstand such conditions. To learn more, we’ve asked six Diamond Certified Expert Contributors to provide their insights on how to prepare a home exterior for winter weather. Read more

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Posted in: Home Maintenance, Seasonal
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A Guide to Gravel

Posted on November 05, 2020 by Suzanne Carroll

Homeowners in the Bay Area are increasingly turning to gravel for their landscaping projects. That’s because gravel can be the right solution for many local landscaping problems. Gravel helps reduce soil erosion by slowing the flow of rainwater, and it’s an attractive groundcover option for areas where plants have difficulty growing. Also, since it doesn’t need irrigation, it’s a great solution for homeowners who want to reduce their water usage. Gravel can even help protect your home by acting as a barrier against encroaching wildfire.  Read more

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Posted in: Landscaping Tips
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LATEST PHONE SURVEY RESPONSES FROM VERIFIED CUSTOMERS
  • Anne R.

    Verified customer
    Quality 10
    Loyalty Yes
    Helpful expertise Yes
    Critique

    Everything that I asked for, they did on time.
    They were honest about what they did and their pricing.

  • Rachael T.

    Verified customer
    Quality 10
    Loyalty Yes
    Helpful expertise Yes
    Critique

    They are very accommodating and responsive.
    The valet guys were professional, on time, and understood what we needed.

    Response to Diamond Certified Company Peninsula Parking

THIS WEEK’S FEATURED DIAMOND CERTIFIED EXPERT CONTRIBUTIONS

Terry Barkai is Business Operations Manager of 911 Remediation LLC dba 911 Restoration, a Diamond Certified company. He can be reached at (925) 750-8660 or by email.

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Terry Barkai: A Restorative Career

By James Florence, Diamond Certified Resource Reporter

RICHMOND — Terry Barkai used to build new structures for a living, but today his career is all about restoring damaged ones. “Before working in the restoration industry, I was in general construction,” he affirms. “I met Erez Gilad, the owner of 911 Restoration, and we had a good connection. Not long after, I went to work for him. With all that was happening with the wildfires in California, fire damage restoration really interested me, much more so than general construction. I figured I could really excel in an industry that interested me, so I decided to give it a shot.”

Today, Read more

Expert tip
Fire Damage Restoration Procedure
RICHMOND — During the past few years, wildfires have become an increasing concern in California. In 2020 alone, more than four million acres were burned statewide, along with more than 10,000 structures. If your home was affected by… Read more

Justin Pounds is manager of Sleep City Mattress Centers – Santa Rosa East, a Diamond Certified company. He can be reached at (707) 786-3995 or by email.

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Justin Pounds: An Interactive Career

By James Florence, Diamond Certified Resource Reporter

SANTA ROSA — If there’s one thing Justin Pounds has learned during his 16 years in mattress sales, it’s the nuances of human interaction. “Whether or not you’re a ‘people person,’ when your job entails being around and interacting with people every day, you pick up on a lot of things,” he explains. “As a result, when you interact with people outside of work, you’re able to read into body language and psychology more than the average person. So, it’s kind of an interesting skill that I’ve developed during the course of my career.”

As manager of Sleep City Mattress Centers – Read more

Expert tip
The Importance of Mattress Shopping in Person
SANTA ROSA — These days, a lot of people research and even purchase mattresses online. However, this practice overlooks one of the most important aspects of buying a mattress: the in-person experience. Buying a mattress isn’t like buying… Read more

Daniel Basich is manager of Sleep City Mattress Centers – Windsor, a Diamond Certified company. He can be reached at (707) 408-2966 or by email.

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Daniel Basich: Mattress Maven

By James Florence, Diamond Certified Resource Reporter

WINDSOR — In transitioning from restaurant management to mattress sales, Daniel Basich didn’t know if he would sink or bounce. Fortunately, his career move turned out to be a firm success. “I was working as a restaurant manager when a friend who worked for Sleep City told me they were hiring sales reps,” he recounts. “It seemed like a good opportunity to try something new. Restaurant management entailed long hours, so a change of pace sounded nice. Plus, I’ve always been told I have the gift of gab, so sales seemed like a good fit.”

After landing the job, Read more

Expert tip
Advice for Couples Choosing a Mattress
WINDSOR — Choosing a new mattress can be tough, but it can be especially difficult for couples. While some couples share the same comfort preferences, most don’t, which can make it hard to find a solution that pleases… Read more

Sandy Willis is president of Molly Maid of S. Silicon Valley, a Diamond Certified company. She can be reached at (408) 763-3556 or by email.

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Sandy Willis: Entrepreneurial Aptitude

By James Florence, Diamond Certified Resource Reporter

SAN JOSE — Sandy Willis has always had a penchant for entrepreneurship. Even in the midst of an economic recession, she was able to find a diamond in the rough. “Back in 2009, my husband, Bill, and I were looking to buy a business that had positive cash flow,” she recounts. “We’ve been entrepreneurs for quite some time—prior to that point, we’d owned three different coffee shops and sold them. We came across a Molly Maid franchise in San Jose and it met our criteria, so we bought it. About three years later, the owner of the neighboring franchise in Cupertino/Saratoga wanted to sell, Read more

Expert tip
How to Properly Disinfect a Surface
SAN JOSE — When disinfecting surfaces inside the home, many people simply spray a disinfectant product on the surfaces and wipe them with a cloth. However, this neglects an important part of the process. Before applying disinfectant to… Read more

David Liu is office manager of Anita’s Housekeeping Referral Agency, a Diamond Certified company. He can be reached at (831) 296-2832 or by email.

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David Liu: The Matchmaker

By James Florence, Diamond Certified Resource Reporter

APTOS — David Liu has been working in the house cleaning industry for some time, but it was only recently that he discovered a better way to match clients with the services they need. “While working for a house cleaning company, I saw a demand in the marketplace from clients looking for more customized services,” he recounts. “Most cleaning companies have a lot of do’s and don’ts—for example, some don’t do laundry or dishes. This makes it hard to find a one-size-fits-all solution for every client’s needs and expectations. So, when I came across Anita’s Housekeeping Referral Agency, I was impressed by their approach. Read more

Expert tip
Setting Your Housekeeper Up for Success
APTOS — When a homeowner is dissatisfied with their house cleaning service, it’s often due to a lack of communication. That’s why, after you decide on a new housekeeper, we recommend taking the time to set clear expectations… Read more

Savi Singh is general manager of Auto Collision Experts, a Diamond Certified company. He can be reached at (408) 758-5704 or by email.

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Savi Singh: Career Cultivation

By James Florence, Diamond Certified Resource Reporter

SUNNYVALE — Growing up in Punjab, India, Savi Singh was always interested in working on cars. However, it wasn’t until he immigrated to the United States that he cultivated that interest into a full-fledged career. “I immigrated to the U.S. in 2003, just before my 18th birthday,” he remembers. “My father had already immigrated a couple of years prior and applied for my mom, my brothers, and I to come join him. I couldn’t attend college during that first year because I hadn’t yet received my green card. So, I started helping my father, who had just opened an auto body shop in Hayward called ASM Auto Body. Read more

Expert tip
Reviewing Your Auto Insurance Coverage Options
SUNNYVALE — One mistake many vehicle owners make is overlooking their auto insurance coverage options. A lot of people just go with the most basic coverage, but there are several additional options that can benefit policy holders. One… Read more

Steve Daniel is president of Steve Daniel Construction Inc., a Diamond Certified company. He can be reached at (916) 229-9554 or by email.

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Steve Daniel: Born to Build

By James Florence, Diamond Certified Resource Reporter

SACRAMENTO — Raised in the construction trades, Steve Daniel was all but destined to become a builder like his forefathers. “My dad was a contractor and so was my grandfather, so it’s in my blood whether I like it or not,” he laughs. “By the time I was 13, my dad was taking me out on jobs regularly. He worked all the time and always needed help, and who do you think he was going to call to help him? That strapping young man sitting on the couch watching cartoons, that’s who!”

Following high school, Steve attended college, Read more

Expert tip
Having the Right Motivation With Remodeling
SACRAMENTO — When planning for a home remodeling project, it’s important to reflect on your motivation. Otherwise, you may end up making decisions that you later regret. For example, a lot of homeowners get caught up in following… Read more

Curt Glaze is showroom manager of California Custom Carpets, a Diamond Certified company. He can be reached at (510) 984-3688 or by email.

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Curt Glaze: A Perfect Fit

By James Florence, Diamond Certified Resource Reporter

DUBLIN — Between his professional and personal experience, Curt Glaze found a career in flooring sales to be a perfect fit. “Before getting into flooring, I worked as a program manager for Hewlett-Packard,” he recounts. “I’ve always liked working with people. Personally, I also did a lot of remodeling on my home and always enjoyed the design aspects of it. So, when I decided to switch careers, I found that flooring sales was a good fit. Over the years of working in the industry, I’ve encountered everything from small fixer-upper homes to big-budget luxury remodeling projects, so when someone walks into the store, Read more

Expert tip
The Truth About Engineered Hardwood Floors
DUBLIN — When it comes to wood flooring, many consumers have a perception that engineered hardwood is inferior to solid hardwood. In reality, that’s not at all the case. To learn more, let’s do a side-by-side comparison to… Read more

Mariano Renteria is owner of Falcon Roofing, a Diamond Certified company. He can be reached at (408) 713-0389 or by email.

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Mariano Renteria: No Place Like Home

By James Florence, Diamond Certified Resource Reporter

SAN JOSE — After leaving his family’s trade to pursue a different career, it didn’t take long for Mariano Renteria to realize there’s no place like home. “After high school, I did a little bit of roofing, but I wasn’t sure it was for me,” he remembers. “There were a lot of roofers in my family, so it made sense to follow in their footsteps. However, I wanted to try something different, so I became a truck driver. I liked it at first, but after a while I grew tired of being on the road for weeks at a time. Read more

Expert tip
Attic Ventilation: A Crucial Aspect of Roof Replacement
SAN JOSE — A crucial aspect of any roof replacement project is ensuring proper attic ventilation. In fact, all roofing warranties stipulate that the attic must be vented properly, which means if yours isn’t, you could lose out… Read more

Lior Zeevi is president of Insulation Guru Inc. dba HVAC Guru, a Diamond Certified company. He can be reached at (408) 763-3543 or by email.

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Lior Zeevi: East to West

By James Florence, Diamond Certified Resource Reporter

SAN JOSE — After starting his HVAC career on the East Coast, Lior Zeevi decided to pack up and head west. “I began my HVAC career in 2003 while I was living in Miami, Florida,” he recounts. “What drew me to the industry was an interest in the science of HVAC, particularly air conditioning. Pretty much everyone has air conditioning in Florida, so there was plenty of work, and I ended up opening my own HVAC company. In 2012, I sold that business and moved to the Bay Area, where I started a new company.”

As he became more familiar with his new environment, Read more

Expert tip
Air Conditioning System Maintenance
SAN JOSE — When properly installed, a home air conditioning system should last for at least 20 years. However, in order for the system to reach its expected lifespan, ongoing maintenance must be observed. In addition to prolonging… Read more

Michael Davis is president of Davis Roofing Group, a Diamond Certified company. He can be reached at (916) 229-6192 or by email.

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Michael Davis: A Long Way to the Top

By James Florence, Diamond Certified Resource Reporter

GALT — Michael Davis has been in the roofing trade since he was a teenager. Looking back, he credits his early initiation to a family friend in the industry. “My godfather owns a roofing company,” he recounts. “My dad and my brother both worked for him, so naturally I ended up there as well. I was 14 years old when I started and that’s where I received all my training. Basically, I fell in love with the trade and I’ve been involved ever since.”

More than two decades after beginning his career, Michael finally made the transition from employee to owner. Read more

Expert tip
Save Money by Maintaining Your Roof
GALT — Roof maintenance is one of the best ways for homeowners to save money over time. After all, it’s a lot easier and less expensive to maintain a roof than it is to replace one. And when… Read more

Mike Im is president of Im Roofing Company, a Diamond Certified company. He can be reached at (415) 878-3187 or by email.

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Mike Im: An Early Start

By James Florence, Diamond Certified Resource Reporter

PACIFICA — Mike Im’s roofing career got off to an early start thanks to a family member who worked in the industry. “I got into roofing because of my uncle, who had his own roofing company,” he explains. “I was fortunate to learn the process of roof installation at a young age. At first, I mainly worked with my uncle during summers, but after I turned 18, I began doing it full time. I became very focused on refining my skills and knowledge, and within three years, I teamed up with my dad to open our own roofing business. Read more

Expert tip
Roofing Shingle Warranties: What You Need to Know
PACIFICA — In the past, roofing shingles were warrantied for a set number of years depending on their quality grade. For example, you could get a “30-year shingle” or a “40-year shingle.” More recently, the industry has shifted… Read more