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  • Deep Info™

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

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
Video: Tips for Installing Garage Storage Cabinets

Posted on June 13, 2019 by James Florence

Earlier this week, we posted an article featuring expert tips for garage remodeling and improvements. One of the tips was about installing shelves to improve garage storage and organization. To learn more about this useful garage improvement, watch this video by Diamond Certified Expert Contributor Nick Granato of PremierGarage.

 

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Posted in: Diamond Certified Experts
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Diamond Certified Experts: Garage Remodeling and Improvements

Posted on June 11, 2019 by James Florence

When it comes to home remodeling, one area that often gets overlooked is the garage. Perhaps this is because many homeowners regard their garage as separate from the rest of their home or simply fail to see its potential as a functional space. The reality is that improvements to a garage can significantly impact the aesthetic, practical and financial value of the entire home. To learn more, we talked to four Diamond Certified Expert Contributors about garage remodeling and improvements. Read more

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Posted in: Home Remodeling, Home Organization, Diamond Certified Experts
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Put Your (Square) Feet to Work: How to Turn Your Space Into a Short-Term Rental

Posted on June 06, 2019 by Jennifer Chan

Ever since the introduction of Airbnb a decade ago, homeowners don’t have to be serial landlords or own second homes to earn rental income. If you have an in-law apartment or a spare bedroom, you can put those extra square feet to work. Preparing your home to rent will require effort on your part, but the extra income may well be worth it. If you’re considering turning your home or another property into a short-term rental, here are a few steps you can take to jumpstart the process:

Know the Rules

Around the Bay Area, cities such as San Francisco and Berkeley have passed regulations on short-term rentals, bringing them more in line with hotel taxation plans. Read more

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Posted in: Painting, House Cleaning, Home Security, Home Maintenance, Uncategorized, Home Tips
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Summer Mosquito Prevention in the Bay Area

Posted on June 04, 2019 by James Florence

During the first half of 2019, we received a great deal of rain in the San Francisco Bay Area. What’s more, the rainy season went on longer than expected, with storms hitting as late as mid-May. Despite bringing relief to a long-standing drought, all this extra rainfall has certain consequences, one of which may be a particularly bad mosquito season. Since mosquitoes can breed in as little as a tablespoon of standing water, the moister-than-average conditions could mean a spike in mosquito populations this summer. Read more

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Posted in: Pest Control, Seasonal
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LATEST PHONE SURVEY RESPONSES FROM VERIFIED CUSTOMERS
  • Quynh B.

    Verified customer
    Quality 10
    Loyalty Yes
    Helpful expertise Yes
    Critique

    I was referred by a friend. They were very friendly. They came out 3 or 4 times to get me a bid. They were also flexible, met my needs, and fixed a lot of stuff. It was very personalized service, and the scheduling was great.
    I would say the fact that it's local, the sales associate was very friendly.

    Response to Diamond Certified Company Solar System, Inc.

  • Madison B.

    Verified customer
    Quality 10
    Loyalty Yes
    Helpful expertise Yes
    Critique

    They are honest, and they are good. They are the best plumbers ever. They are a bit expensive, but it is okay.
    I would give them an '11'. I like the quality of work. They are courteous, on time, and clean.

THIS WEEK’S FEATURED DIAMOND CERTIFIED EXPERT CONTRIBUTIONS

Lamar Spalding is president of All In One Home Services, a Diamond Certified company. He can be reached at (925) 938-6251 or by email.

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Lamar Spalding: An Unlikely Inspiration

By James Florence, Diamond Certified Resource Reporter

DUBLIN — With a background in product management, Lamar Spalding never expected to one day own a home repair business. However, in the course of renovating his own home, he was struck by an unlikely inspiration. “In 1989, I purchased a ‘fixer upper’ and spent the next seven years working on it,” he remembers. “During this time, I worked with a lot of contractors and was quite amazed at the inconsistency of my experiences. Some contractors were really organized and on top of things while others seemed like they were just winging it. This made it challenging to find the right professionals for the job, Read more

Expert tip
How to Choose a Quality Contractor
DUBLIN — A successful home improvement project starts and ends with the choice of a quality contractor. So, how can you be sure to choose one? Follow these steps: Find a few good candidates. There are several different starting points… Read more

Michal Johnson is owner of Grout Works Bay Area, a Diamond Certified company. He can be reached at (925) 385-8936 or by email.

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Michal Johnson: A Hands-On Career

By James Florence, Diamond Certified Resource Reporter

ANTIOCH — After working in the petrochemical industry for nearly three decades, Michal Johnson decided to pursue a more hands-on career. “During my 28 years in the petrochemical industry, I traveled a lot and worked in oil refineries all over the nation,” he recounts. “After being transferred to Northern California in the early 2000s, I began thinking seriously about starting my own business. I love working with my hands and had accumulated a lot of home improvement experience from flipping investment properties. I particularly enjoyed working with tile, so that seemed like a good thing to specialize in. I started my own tiling business in 2011 and have been doing it ever since.”

Today, Read more

Expert tip
How to Prevent Soap Scum in Your Shower
ANTIOCH — One of the biggest problems with showers is keeping them clean. Over time, shower tiles accumulate soap scum, which can be hard to remove. What makes soap scum so difficult to deal with is the fact that it… Read more

Jamie Duran is president of Solar Harmonics Inc., a Diamond Certified company. He can be reached at (925) 335-6905 or by email.

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Jamie Duran: A Solar Opportunity

By James Florence, Diamond Certified Resource Reporter

BRENTWOOD — Jamie Duran spent his early career working in an environment that stifled his entrepreneurial spirit, so when he saw an opportunity to start his own business, it was like a ray of sunlight piercing the dark. “Before getting into solar, I worked in finance,” he remembers. “I’ve always been very entrepreneurial, but there’s little opportunity to exercise that trait in the financial world. There are a lot of rules and, worse still, a lot of politics, so it was a constant uphill battle to affect any real, positive change.”

In the mid-2000s, Jamie took notice of an increasing trend toward clean energy, Read more

Expert tip
Energy Saving Tips for Your Swimming Pool
BRENTWOOD — Everyone loves swimming pools, but no one loves the expenses required to maintain them. Between filtration and heating, a swimming pool consumes a lot of energy, which is anything but cheap, especially in California. Fortunately, there are a… Read more

Ehsan Rezaee is owner of Molly Maid of Sonoma County, a Diamond Certified company. He can be reached at (707) 219-6365 or by email.

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Ehsan Rezaee: A Clean Opportunity

By James Florence, Diamond Certified Resource Reporter

PETALUMA — Ehsan Rezaee had often dreamed of running his own business, but he never imagined it would be a house cleaning franchise. “My younger brother, Hesam, and I had been talking about starting a business together,” he recounts. “Originally, we thought about running a restaurant franchise, but one day he called and told me about a house cleaning franchise he’d found. I didn’t know anything about house cleaning, but it seemed like a good opportunity and we decided to give it a shot. In 2013, we opened the Sonoma County branch of Molly Maid. It took some time to get fully acquainted with the industry, Read more

Expert tip
How (and When) to Clean Your Dishwasher
PETALUMA — Your dishwasher cleans your dishes, but sometimes it needs to be cleaned as well. Here are some signs that it’s time to clean your dishwasher: Reduced effectiveness in washing Calcium stains from the hard water An… Read more

Chad Wolffe is CFO of Vulcan Garage Services Inc., a Diamond Certified company. He can be reached at (408) 827-8993 or by email.

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Chad Wolffe: A Fitting Career

By James Florence, Diamond Certified Resource Reporter

SAN JOSE — When Chad Wolffe first looked into becoming a garage door technician, he found it was a good fit in more ways than one. “Before I got into garage door service, I was a technician for DirecTV,” he recounts. “One thing I didn’t like about my job was that I always had to access hard-to-reach places. If I wasn’t up on a 40-foot ladder, I was squeezing into a tight crawl space or attic. Being a larger guy, this was a constant struggle. Eventually, I decided to look for a different line of work and put my resume online. Read more

Expert tip
Garage Door Maintenance
SAN JOSE — Like any mechanical device, a garage door has a lot of moving parts that require periodic maintenance. Fortunately, maintenance is pretty simple for a garage door. All you need to do is lubricate its rollers, hinges and… Read more

Ona Hennessey is owner of Hennessey’s Construction and Fence, a Diamond Certified company. She can be reached at (925) 335-6933 or by email.

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Ona Hennessey: Building a Livelihood

By James Florence, Diamond Certified Resource Reporter

BRENTWOOD — Like many working mothers, Ona Hennessey once struggled to maintain a balance between career and family. Eventually, she decided the best solution was to build her own livelihood. “I worked for several years at Sierra Lumber and Fence, where, as manager of the retail department, I handled things like sales and ordering materials,” she recounts. “Being a working mom, I always wished I had a little more flexibility with my job, and by the time I was pregnant with my fifth child, I had put a lot of thought into my professional future. With all the experience I’d acquired working for Sierra, Read more

Expert tip
3 Signs That it’s Time to Replace Your Fence
BRENTWOOD — A failing fence can be easy to ignore, but between its important function and the potential risks of failure, it’s an important issue to address. While in some cases it may be possible to repair your fence, in… Read more

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

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­­Mike Creeden: A Twofold Education

By James Florence, Diamond Certified Resource Reporter

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

Five years later, Read more

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

Cory Wikstrom is secretary of Vulcan Garage Services Inc., a Diamond Certified company. He can be reached at (408) 827-8993 or by email.

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Cory Wikstrom: Working in Doors

By James Florence, Diamond Certified Resource Reporter

SAN JOSE — Starting in his early 20s, Cory Wikstrom has spent nearly his entire professional career working in doors—garage doors, specifically. “Right out of high school, my younger brother got a job with a garage door company owned by his friend’s family,” he remembers. “It seemed like a good job, so I decided to apply and got hired. I spent the next eight years there before moving on and working for a few other garage door companies.”

Eventually, Cory started talking with his friend/co-worker Chad Wolffe about starting their own garage door business. However, one element was still missing. Read more

Expert tip
Making the Most of Your Replacement Garage Door
SAN JOSE — When purchasing a replacement garage door, smart choices can help you make the most of your investment. Here are a few tips: Consider money-saving alternatives. A high-end, carriage-style wood door can cost more than $10,000. For a… Read more

Michael Fahey is CEO of Vulcan Garage Services Inc., a Diamond Certified company. He can be reached at (408) 827-8993 or by email.

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Michael Fahey: Garage Door Guru

By James Florence, Diamond Certified Resource Reporter

SAN JOSE — When Michael Fahey answered an ad for a management position, he had no idea where it would lead him…especially because it didn’t specify the industry. “It was just a generic ad placed by an owner looking for someone to run his company for him,” he recounts. “It wasn’t until later that I found out it was a garage door company. With my background in sales, marketing and home improvement, I had all the qualifications the owner was looking for, so I decided to give it a shot.” In 2018, nearly a decade later, Michael took the knowledge and experience he’d accumulated and started an independent garage door service company with partners Cory Wikstrom and Chad Wolffe. Read more

Expert tip
The Benefits of a Wi-Fi Enabled Garage Door
SAN JOSE — One upgrade all homeowners should consider is converting to a Wi-Fi enabled garage door. Incorporating Wi-Fi into your garage door’s motor will allow you and your family members to open and close the door from a smartphone… Read more

David Drowty is president of Top Priority Roofing, Inc., a Diamond Certified company. He can be reached at (707) 659-6987 or by email.

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David Drowty: A Professional Priority

By James Florence, Diamond Certified Resource Reporter

ARBUCKLE — When David Drowty started working as a roofer in his late 20s, he thought he was just getting into a trade, but it was actually the beginning of something bigger. “Initially, I saw roofing as just another job—a step up from my prior job working at Costco, but nothing particularly life-changing,” he recounts. “However, I ended up developing a real passion for both the work itself and the customer service side. I also began to develop a vision for starting my own roofing company. I’d worked with a lot of different contractors, and in most cases I felt I could do a better job taking care of customers. Read more

Expert tip
Understanding the Roof Replacement Process
ARBUCKLE — When it comes to replacing a roof, many homeowners are unfamiliar with the process. To get some clarification, read the following step-by-step overview. 1. First, the homeowner must request bids from one or more roofing contractors. Once a… Read more

Brandy Straub is owner of Redwood Empire Termite & Pest Control, a Diamond Certified company since 2011. He can be reached at (707) 654-4593 or by email.

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Brandy Straub: Dirty Work

By James Florence, Diamond Certified Resource Reporter

WINDSOR — Born into a family of pest control professionals, Brandy Straub cut his teeth doing the dirty jobs no one else wanted to do before expanding his career horizons. “My grandfather started Redwood Empire Termite & Pest Control in 1946,” he recounts. “My father got involved in the business when he was 15 years old, and I started even younger, working after school, on weekends and during summer vacations. Of course, they had me do all the dirty work they didn’t want to do, like going underneath houses and cleaning up rodent remains. Eventually, I got tired of doing that, Read more

Expert tip
The Importance of Professional Termite Inspections
WINDSOR — Like most people, you probably take a preventative approach to checking up on your car, your teeth, and other crucial aspects of your daily life and health. However, even if you’re proactive about these things, there’s another crucial… Read more

Moshe Spund is owner of FixEm Appliance Repair, a Diamond Certified company. He can be reached at (925) 386-6928 or by email.

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Moshe Spund: Assembling a Livelihood

By James Florence, Diamond Certified Resource Reporter

OAKLAND — As a kid, Moshe Spund enjoyed taking things apart and reassembling them, but he never thought he’d one day make a career out of it. “I’ve always had an interest in knowing how things work,” he affirms. “To me, it’s like a puzzle. If something isn’t working right, I enjoy the challenge of figuring out what’s causing it and how to repair it. Still, I never considered a career in appliance repair until I saw an online job listing. When I went in for the interview, I was skeptical, but once I started, I fell in love with the trade.”

In 2018 (roughly five years after he started as an appliance repair technician), Read more

Expert tip
An Important Dryer Maintenance Measure
OAKLAND — Have you noticed that your dryer isn’t working as well as it used to? Is it taking longer to dry your clothes? Is your dried laundry full of loose lint? Believe it or not, these issues can all… Read more