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LOCAL CONSUMERS AND COMPANIES RELY ON THE DIAMOND CERTIFIED RESOURCE

Barbara Schallau Consumer
Bay Area

Hany Louis CEO/General Manager
The Tile & Grout King Inc.

Jagdish Hegde Consumer
Fremont

Leigh Bakhtiari President
City Carpets

Cecile Monfort Consumer
San Jose

Mark Corrallo President
All Seasons Construction

Jim Baylor Consumer
Bay Area

Bev Oliver Consumer
Bay Area

Gifford Teeple Owner
A Reliable Handyman

Tami Aviles Consumer
Bay Area

Tommy Herren Owner
The Lighting Geek

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®.
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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.

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.

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.

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
Compilation: Expert Tips From the 2019 Diamond Certified Directory

Posted on April 18, 2019 by James Florence

Earlier this month, we published the 2019 Diamond Certified Directory. Issued in 10 regional editions, it features full-page profiles of Diamond Certified companies throughout the Greater Bay Area. In addition, each directory includes a section that features helpful consumer tips provided by owners and managers of local Diamond Certified companies. To give you a sample, we’ve assembled the following compilation of expert tips gathered from the 10 different directory editions in print. Read more

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Posted in: Diamond Certified Experts
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How to Use the 2019 Diamond Certified Directory

Posted on April 16, 2019 by Jennifer Chan

Since the beginning of April, the 2019 Diamond Certified Directory has been arriving at the homes and businesses of consumers throughout the Greater Bay Area. We mailed more than 800,000 directories and we’ve been thrilled with the response! (If you didn’t get your FREE copy, click here.)

We wanted to take a moment to remind you of all the great features the Diamond Certified Directory contains.

Every company listed in each county-specific directory has earned the prestigious Diamond Certified award, which means they’ve been independently rated Highest in Quality and Helpful Expertise®. Our ratings team works year-round vetting local companies. They phone past customers, verify licenses, and ensure that things like certifications and insurance are up-to-date. Read more

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Posted in: Uncategorized, Consumer News, Consumers, Diamond Certified News
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Video: Why Inspect Your Attic?

Posted on April 11, 2019 by The Release of the 2019 Diamond Certified Directory

Earlier this week, we posted an article featuring expert tips about attic cleaning, insulation and ventilation. Few homeowners realize problems like high energy bills and poor indoor air quality can stem from deficient attic conditions. To learn more about the impact your attic can have on your home, watch this video by Diamond Certified Expert Contributor Sean Madar of Atticare.

 

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Diamond Certified Experts: Addressing the Attic

Posted on April 09, 2019 by James Florence

It’s no surprise that the attic is one of the most neglected areas of the home. Being out of sight, it’s understandably out of most homeowners’ minds. What may come as a surprise, however, is the extent to which conditions in the attic can impact a home’s comfort, energy efficiency and air quality. To gain further insight, we’ve asked five Diamond Certified Expert Contributors to talk about three important aspects of the attic: insulation, cleaning and ventilation. Read more

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Posted in: Roofing, Energy Efficiency, Pest Control, Diamond Certified Experts, Home Improvement
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LATEST PHONE SURVEY RESPONSES FROM VERIFIED CUSTOMERS
  • Linda K.

    Verified customer
    Quality 10
    Loyalty Yes
    Helpful expertise Yes
    Critique

    I would say that they were great, very helpful, and I would use them again.
    They were really down to earth and made us feel like part of the family.

    Response to Diamond Certified Company Rich & Leslie Macario - Alain Pinel Realtors

  • C.E.

    Verified customer
    Quality 10
    Loyalty Yes
    Helpful expertise Yes
    Critique

    He did a good job. He was on time, and he explained everything. He gave me his business card and said if there were any other questions, I could call him back. He did a thorough job.

THIS WEEK’S FEATURED DIAMOND CERTIFIED EXPERT CONTRIBUTIONS

Sean Koriat is owner of Attic Crew, a Diamond Certified company. He can be reached at (650) 238-6897 or by email.

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Sean Koriat: An Energy-Saving Career

By James Florence, Diamond Certified Resource Reporter

PALO ALTO — Upon moving to California from his native country of Israel, Sean Koriat traded a career of saving lives for one of saving energy. “Before I came to the United States, I worked as a paramedic in Israel,” he remembers. “I met my wife on a vacation to California and ended up moving here permanently.” When it came time for him to establish a new professional livelihood, Sean decided to try his hand at a trade that had always interested him: HVAC. “The idea of making people’s homes more energy-efficient and comfortable really appealed to me. I started out working for a local HVAC company and eventually decided to start my own company that specialized in attic cleaning and renovations.”

Today, Read more

Expert tip
Dealing With Rodents in the Attic
PALO ALTO — An overlooked problem found in many homes is rodent infestation in the attic. Most attics contain gaps, cracks and spaces that are big enough for rodents to pass through, and since attics are typically uninhabited, this makes… Read more

Chris Morimoto is owner of Bay Area Home Services, a Diamond Certified company. He can be reached at (707) 200-1320 or by email.

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Chris Morimoto: An Unexpected Transition

By James Florence, Diamond Certified Resource Reporter

BENICIA — Having a good personality goes a long way, but for Chris Morimoto, it led to a totally unexpected career transition. “Back in 2001, I called a local HVAC company to get a consultation for replacing my furnace,” he recounts. “At the end of the appointment, the technician said, ‘You’re a pretty cool guy, you should meet my boss.’ At the time, I was interested in switching careers, so I decided to take his advice. I met with the boss and he hired me on the spot for a sales job. Over the next few years, I moved from sales to doing service and installation. Read more

Expert tip
Ductless Mini-Splits for HVAC
BENICIA — Is your central HVAC system outdated or in poor condition? Are you looking at alternative options for heating and cooling your home? Are you planning for a home addition? Are you considering adding a solar energy system? If… Read more

Nate Missildine is president of Legacy Construction, Inc., a Diamond Certified company. He can be reached at (408) 692-5918 or by email.

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Nate Missildine: Expanding Horizons

By James Florence, Diamond Certified Resource Reporter

CAMPBELL — After nearly a decade working in the HVAC field, Nate Missildine was ready to expand his professional horizons. Ironically, this meant returning to the field where he’d originally started his career. “My first job in the trades was doing remodels with one of my friend’s brothers right out of high school,” he remembers. “After I turned 20, I went to school for heating and air conditioning, where I earned my certification. I worked in the HVAC field for about nine years but eventually felt I wanted to do something with a little more variety, so I got back into building and remodeling. Read more

Expert tip
Avoiding Budget Oversights With Building Proposal Allowances
CAMPBELL — Any large-scale building or remodeling project starts with a written proposal, the thoroughness of which can greatly impact the final result. A building proposal generally consists of two aspects: 1) specifications or specific services needed to complete the… Read more

Liam Caldwell is president of Armstrong Carpet & Linoleum Co., a Diamond Certified company. He can be reached at (415) 754-3955 or by email.

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Liam Caldwell: Homegrown Talent

By James Florence, Diamond Certified Resource Reporter

SAN FRANCISCO — When Liam Caldwell started working at Armstrong Carpet & Linoleum Co. as a teenager, he hadn’t the slightest notion that he’d one day be president of the company. “I started here when I was 15, working after school and on weekends,” he remembers. “I did everything from making deliveries to binding carpets and making pads. Even after I went to college, I would return every summer and work at the store.”

After graduating, Liam figured it was time to move on to a new career, but a simple phone call disrupted his plans. “I was considering career options when Steve Balestrieri, Read more

Expert tip
Window Coverings That Optimize Light Control
SAN FRANCISCO — There are several factors to consider when choosing window coverings, from style and material to functionality and even safety. However, perhaps the most significant of all these factors is light control. After all, if you have… Read more

Simon Spark is president of Build SF, Inc., a Diamond Certified company. He can be reached at (415) 992-3027 or by email.

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Simon Spark: An Artistic Inspiration

By James Florence, Diamond Certified Resource Reporter

SAN FRANCISCO — Simon Spark has always been an artistic person, but he never expected to apply his talents to the realm of residential remodeling. “I started working in the construction field to support myself while attending college, where I studied fine arts,” he remembers. “After graduating, I spent the next 10 years working as a professional artist, doing primarily mixed media sculptures and drawings. Eventually, in my mid-30s, I came to a crossroads where I wanted to start a family and needed a more financially lucrative livelihood. So, I got my contractor’s license and went into business doing residential building and remodeling in San Francisco.”

Today, Read more

Expert tip
The First Step to Starting a Remodeling Project in San Francisco
SAN FRANCISCO — If you own a San Francisco property and are considering a remodeling project, there’s one preliminary step you’ll want to take before getting a contractor involved: contact the city building department to find out if there are… Read more

William Young is owner of Edge Roofing, a Diamond Certified company. He can be reached at (415) 529-6796 or by email.

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William Young: A Competitive Edge

By James Florence, Diamond Certified Resource Reporter

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

When asked his favorite part of his job, Read more

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

Corey Haney is a field supervisor at STATCOMM Inc., a Diamond Certified company. He can be reached at (650) 988-9508 or by email.

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Corey Haney: Playing it Safe

By James Florence, Diamond Certified Resource Reporter

MOUNTAIN VIEW — When Corey Haney was unsure about his next career move, he took a shot at a job opportunity in the life safety industry. “I had been working in concrete construction, but I got laid off when the economy crashed in 2008,” he recounts. “I wanted to get into an industry that was more insulated from economic turbulence, so I started researching. I found an opening with Statcomm Inc. and it seemed like a good fit—not only did life safety strike me as a pretty interesting field, it was definitely more stable than construction. I started as an apprentice, Read more

Expert tip
2 Fire Safety Tips for Your Home
MOUNTAIN VIEW — When it comes to fire safety, even small steps can potentially save your life. Here are a couple of basic fire safety tips for your home: 1. Test fire safety equipment. The simplest way to reduce fire… Read more

Rory Moore is owner of RM Construction, a Diamond Certified company. He can be reached at (415) 534-5497 or by email.

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Rory Moore: From the Farm to the City

By James Florence, Diamond Certified Resource Reporter

SAUSALITO — After four decades in construction, Rory Moore reflects on how his upbringing provided the foundation for his later career. “When you grow up on a farm in the West of Ireland, you learn a lot of different trades,” he recalls. “We had to build our own barns, walls, you name it…so it all started at a very young age for me. After I turned 12, I began working alongside my older brothers for a local plasterer during the summers, and things progressed from there.”

Eventually, Rory made his way to San Francisco, Read more

Expert tip
Air Filtration Systems: A Healthy Home Improvement
SAUSALITO — When it comes to home remodeling, most homeowners are concerned with improving aesthetics or performance. While these aspects are certainly worthwhile, an equally important concern is creating a healthy indoor environment. As building code requirements become increasingly focused… Read more

Roee Erenshteyn is CEO of 911 Remediation LLC, a Diamond Certified company. He can be reached at (510) 275-3708 or by email.

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Roee Erenshteyn: Getting Acquainted

By James Florence, Diamond Certified Resource Reporter

RICHMOND — When asked how he ended up in the water and fire damage restoration industry, Roee Erenshteyn says it resulted from making an acquaintance that, while remote, was very close to home. “While researching job opportunities online, I got in touch with Erez Gilad, owner of 911 Remediation, via Facebook,” he explains. “We’re both Israeli, and although he lived in the U.S. and I still lived in Israel, we had a lot of mutual connections. After interviewing with him, I started working for his company remotely. In May 2017, I moved to the U.S. to assume the position of CEO.”

When asked his favorite part about his job, Read more

Expert tip
Why You Shouldn’t Attempt to Clean Mold Yourself
RICHMOND — Upon discovering mold in your home, your first instinct will likely be to clean it up yourself. However, in most cases, you’re better off ignoring this instinct and leaving the job to a professional. Why? Because cleaning mold… Read more

Nikolaos Margaritis is president of Kyvos Construction Inc., a Diamond Certified company. He can be reached at (510) 394-4929 or by email.

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Nikolaos Margaritis: Building Forward

By James Florence, Diamond Certified Resource Reporter

Before he came to the United States, Nikolaos Margaritis was a building contractor in his home country of Greece. While his relocation initially posed a professional setback, it ultimately set him up for greater success. “I started in construction many years ago when I lived in Greece, and at one point I even had my own general contracting firm,” he recounts. “However, as the situation in Greece began to worsen in the mid-2000s, I made the choice to immigrate to the U.S. Upon my arrival, I got back into construction, but I basically had to start all over again as a laborer. Read more

Expert tip
Preliminary Steps for Hardwood Floor Installation
PITTSBURG — When installing a hardwood floor, proper procedure is critical. This includes preliminary steps like preparing the subfloor and assessing interior climate conditions. Be sure to observe the following preliminary steps for your hardwood floor installation project: Preparation of… Read more

Brian Folden is president of Fireside Property Management, a Diamond Certified company. He can be reached at (408) 498-7959 or by email.

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Brian Folden: A Fire Inside

By James Florence, Diamond Certified Resource Reporter

SAN JOSE — Brian Folden has always been motivated by a burning desire for professional independence. While he’s achieved this to varying degrees throughout his career, only recently was he able to fully attain it. “I’ve always felt a drive to operate independently and be my own boss, which is one of the reasons I got into real estate,” he says. “My dad has been in the industry since I was a kid, so I basically followed in his footsteps. After 30 years working in partnership with him at Fireside Realty, I wanted a business I could run on my own. Read more

Expert tip
The Importance of Relational Boundaries in Property Management
SAN JOSE — If you’re a property owner, make sure you’re establishing proper relational boundaries with your tenants. While it’s good to have a healthy working relationship with your tenants, it’s important to avoid getting overly close or emotionally involved… Read more

Duane Vos is CEO of Creative Window Fashions, Inc., a Diamond Certified company since 2011. He can be reached at (415) 935-0986 or by email.

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Duane Vos: Blind Ambition

By James Florence, Diamond Certified Resource Reporter

ROHNERT PARK — When Duane Vos started installing window blinds as a young man, he had no idea it would lead to a full-fledged career. “My dad owned a flooring and decorating store in Parker, Arizona, where they sold window coverings but didn’t install them,” he remembers. “He was also into cars and was paying me to restore a ’59 El Camino in the shop behind the store. One night, his manager told me he’d been installing blinds after work for the last 15 years and asked if I was interested in taking over for him. At $15 per blind, Read more

Expert tip
The Value of Window Shutters
ROHNERT PARK – When it comes to selecting new window treatments, today’s homeowners have numerous options. However, out of the many choices available, only one will substantially add to the value of a home: shutters. Once they’re installed,… Read more