Overview
About Us
Bay Valley Roofing specializing in all styles of roofing systems. Serving Solano, Contra Costa, and Alameda Counties since 1989.
*Contractors enrolled in GAF certification programs are not employees or agents of GAF, and GAF does not control or otherwise supervise these independent businesses. Contractors may receive benefits, such as loyalty rewards points and discounts on marketing tools from GAF for participating in the program and offering GAF enhanced warranties, which require the use of a minimum amount of GAF products. Your dealings with a Contractor, and any services they provide to you, are subject to the Contractor Terms of Use.
Customer Reviews

"I cannot say enough about Bay Valley Solar Roofing, especially Ryan Diaz who runs the business. Other businesses should learn from Ryan, who communicates with clients, letting us know the status, and when it is completed, sending photos. They may not be the cheapest, but worth every dollar.Bay Valley had to return to fix the mess (poor workmanship) by another solar company, to ensure the warranty would not be voided. Thank you Ryan!"
"Everyone involved in this roof replacement did an outstanding job from the office personnel, to the owner, to the project manager and to the roofers. Phone calls and emails were answered promptly. Bay Valley Roofing is beyond reproach and my wife and I highly recommend them to anyone looking for a great job. Last but not least, the crew cleaned up daily and was very friendly, careful and attentive to our property."
"Bay Valley Roofing did a wonderful job on our roof. We lost about 40% in a wind storm but opted for a complete replacement. Fair estimate, great communication throughout. Supervisor on site for entire job. Site was completely cleaned at end of each day. They walked us through the process, helped with financing and demonstrated why they are masters of their work. My neighbors were impressed at the work ethic and they were as quiet as they could be. The city roof inspector said they did a phenomenal job! Highly recommend!"

"Excellent Roofing Contractor"
"Very professional"

- "Excellent Roofing Contractor"
- "Very professional"
- "BAY VALLEY ROOFING"
- "Bay Valley was very knowledgeable and professional"
- "BAY VALLEY ROOFING IS EXCELLENT"
- "Professional All the Way"
- "VERY PROFESSIONAL"
- "CAREFULLY FOCUSED CONTRACTOR"
- "Horrible experience"
- "Customer asked us not to share his/her review."
- "KNOWLEDGEABLE & UNDERSTANDING"
- "PROFESSIONAL AND KNOWLEDGEABLE"
- "BAY VALLEY ROOFING VERY PROFESSIONAL"
- "AFTER GETTING 3 ESTIMATES IT WAS"
- "Customer asked us not to share his/her review."
- "GREAT EXPERIENCE!"
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "YES"
- "PROFESSIONAL & KNOWLEDGEABLE"
- "Customer asked us not to share his/her review."
- "SUPERIOR"
- "Had experience & competence"
- "As god as it gets!"
- "Customer asked us not to share his/her review."
- "Do a good job"
- "Met all my needs and the product looks great"
- "Customer asked us not to share his/her review."
- "They Are Professional, Do An Excellent Job And Are Quick. I Like How They Cleaned Up! No Runaway Nails!"
- "Customer asked us not to share his/her review."
- "Truely strive to understand the customers needs to provide a proper high quality solution"
Awards
Installation Excellence Award
This award is for contractors that consistently install with a very high level of quality and provide their customers the highest protection that GAF offers.
Consumer Protection Excellence Award
This award recognizes those contractors that best protect their clients with system selling and enhanced warranties.
Training Excellence Award
This award is for contractors that are committed to training and continuous improvement.