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    Diamond Certified Expert Contributors
    Read topic-based expert articles and watch informative video tips by Diamond Certified Expert Contributors, each of whom manages a local company that has been independently rated Highest in Quality and Helpful Expertise®.

    Diamond Certified Consumer Blog
    The Diamond Certified Blog is updated bi-weekly and features helpful articles and videos on a wide variety of topics. Read blogs about home, health and auto maintenance; learn about industry-leading organizations; stay up-to-date on the latest developments in the Diamond Certified Resource; and much more.

    Savvy Consumer Tips
    Read the latest consumer advice and tips from Chris Bjorklund, a Bay Area consumer advocate with more than 35 years of experience. You can also access archived Savvy Consumer Tips and contact Chris about consumer issues in your area.

    How to Be a Savvy Consumer
    Watch a video and read informative articles to learn how you can be a savvy consumer and get the most out of the consumer experience.

    Local Company Owner Blog
    Read our comprehensive series of business-to-business blogs to gain valuable insight into topics like customer retention, brand building, improving market signals and more.

Helpful Expertise® From Owners of Top Rated Companies

If you want to gain knowledge on specific local services and become a more savvy consumer, we encourage you to access the Diamond Certified Expert Reports through the search options on the right. These mostly industry-specific articles, tip sheets, videos and blog entries are created for consumers by local experts. The authors know what they’re talking about because they own or manage local Diamond Certified companies that have been independently rated Highest in Quality and Helpful Expertise®. Each has contributed their expertise to create these reports for you and other consumers as a way to give back to their community.

Aaron Weiss Owner
Roofmasters / Bird Control Services

Soumil Amin Owner
CertaPro Painters of Berkeley

Christine Stahl Partner
Lommori Stahl Group of Re/Max Star Properties

Dr. William Hummer Owner
William R. Hummer, DDS

Darcy Quinn A and P Moving, Inc.

Agapito Chavez-Reyes Owner
PRI-Premiere Roofing Inc.

Chitra Bheeman Advantage Moving & Storage

Chris Morimoto Owner
Precision Air Solutions

Lamine Elabed President
LW Construction & Handyman Services

Charles Lee Owner
California Concrete – Pump Pros

Laural Roaldson Owner
Laural Landscapes, Inc.

Dave Erickson Automotive Excellence


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 you envision yourself living in the home? If you plan on moving in five years, a practical, mid-range roofing system will likely make more sense than a high-end, cosmetically appealing one.


Do you have specific ideas about the visual look of your roof? In this case, your roofing contractor can tailor your roofing system to include aesthetic features like copper flashings and designer shingles.

Fire risk concerns

Wildfires have become a major concern in the Bay Area during the last several years. 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 meets these requirements.

Fortunately, there are many options for achieving Title 24 compliance with a roof. One is to use cool roofing materials, which are specifically designed to improve energy-efficient performance. For sloped roofs, these include cool roof shingles, synthetic shakes and slates; for flat roofs, these include cool roof coatings, as well as PVC and TPO style roofs.

If you’re partial to a particular roofing material that’s not Title 24-compliant, Read more

Fire-Safe 2020: Defending Your Home Against Wildfires

Posted on June 30, 2020 by James Florence

After being hit particularly hard during the COVID-19 pandemic, California seems due for a summer reprieve. Unfortunately, this is unlikely to be the case. Not only are many areas of the state seeing a resurgence of novel Coronavirus cases, we now face another, more familiar yet equally concerning issue: wildfire season. Each summer, wildfires destroy thousands of acres and homes throughout California, and this year looks to be no exception. That’s why residents (particularly those situated in the wildland-urban interface) must be vigilant about maintaining fire-safe conditions on their properties. Consider the following advice for defending your home against wildfires. Read more

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Posted in: Fire Prevention, Seasonal, Safety
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Benefits of Hiring a Professional Window Washer

Posted on June 23, 2020 by James Florence

Now that Bay Area counties are finally reopening, many residents are playing catch-up with maintenance tasks that normally would’ve been completed earlier in the season. For example, your home’s windows may still be caked with residue from the rainy season. Before you reach for that bottle of glass cleaner, consider a better option: hiring a professional window washer. Here are a few reasons you should leave your panes to the pros. Read more

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Posted in: Windows
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Watch this video to learn Chris Bjorklund's Top 10 ways to be a savvy consumer.

Your Role in Creating a Win-Win Relationship

Many consumers find that it helps to know the scope of their jobs and their overarching goals before talking to a local service company. By knowing what you want to accomplish… Read more

How to be Their Favorite Customer

When you work with a local company, it’s ultimately their responsibility to perform a thorough and complete job, but you play a big part in the success of your project, too… Read more

Best Practices for Communicating with a Company

Delivering feedback to a company is like landing an airplane on an old runway—it can be bumpy or smooth depending on how much work has been put into maintaining the area… Read more


How to Develop the Relationship to Prevent Problems

Be willing to be satisfied. It’s strange but true. Small-business owners and their staff really like making their customers happy for its own reward. They’ll go the extra mile for customers… Read more

The First Steps to Problem Resolution

“Don’t make assumptions.” This piece of wisdom is perhaps the most powerful guiding principle in conflict prevention. I picked it up from a book called The Four Agreements by Don Miguel Ruiz… Read more

Go to Problem Resolution and Mediation Hub

This informative page will teach you what to do when you have an issue with a local company. Read more

Thinking for Reopening and Beyond

Posted on June 04, 2020 by Jim Stein

What’s going to happen after our local economy mostly reopens? Everybody has a prediction, but nobody knows for sure. We can only guess how things will play out during the rest of this year and the next. Your guesses are actually valuable. Organize them to help you think through high, medium and low future scenarios. Then, create strategies for each scenario so you’re well prepared for an uncertain future. Here’s how to do it.

Think in three time periods—we’ll use Red Phase for the time we’re in Shelter-in-Place (SIP), Yellow Phase for an Assessment period and Green Phase for the New Future. Think about each of these time periods and plan your company’s actions based on an Optimistic, Read more

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Big Boost Begins!

Posted on June 04, 2020 by Jim Stein

Intense stressors require bold responses. Today we mailed 820,000 Diamond Certified Directories to quality-seeking families throughout the Greater Bay Area. Plus, to deliver a BIGGER BOOST for your company, we’ve started running a record number of TV, radio and digital announcements to amplify the distribution of your full-page profile in our popular directory. “Bold” may be too subtle a word to characterize the more than DOUBLE the number of the previous record of announcements, stations, reach and frequency running during the next 30 days. BIG BOOST indeed!

Diamond Certified companies will always do well. Now more than ever, consumers seek the higher quality, safer choice. Read more

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Press Release: The 2020 Diamond Certified Plan Ahead Directory is Now Available

Posted on April 21, 2020 by Greg Louie

Novato, CA: American Ratings Corporation (ARC), creator of the popular Diamond Certified Resource, is proud to announce the digital release of the 2020 Diamond Certified Plan Ahead Directory. The first-of-its-kind free directory, specifically designed for residents of the Greater Bay Area who are following COVID-19 “Shelter in Place” mandates, features enhanced listings of Diamond Certified companies in a wide variety of service industries (auto, health, home services and improvement, etc.), articles about preparing for life after coronavirus, helpful local resources, planning checklists and more. Read more

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