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Star Waterproofing and Roofing vs Diablo Delta Painting
Contra Costa Painting Contractors Comparison · Updated March 2026
You're comparing a roofing and waterproofing specialist with 8 years experience to a veteran painting contractor with 34 years in business.
| Star Waterproofing and Roofing | Diablo Delta Painting | |
|---|---|---|
| Rating | ★ 4.3 | ★ 5.0 |
| Years Licensed | 8 years | 34 years |
| License # | 1036279 | 637876 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Walnut Creek, CA | Brentwood, CA |
| Website | www.starwaterproofingco.com | www.diablodeltapainting.com |
Key Differences
What Customers Say
Star Waterproofing and Roofing
Customers consistently praise Star's leak diagnosis expertise and detailed project planning, particularly for complex deck, balcony, and flat roof waterproofing challenges.
Diablo Delta Painting
Customers highlight Diablo Delta's responsive estimate process, professional crew execution, and straightforward approach to residential painting projects.
Key Takeaway: Star's reviews emphasize technical problem-solving for difficult moisture intrusion issues, while Diablo Delta's feedback centers on reliable execution of straightforward painting services with reasonable pricing.
Customer Reviews
Star Waterproofing and Roofing
Gilber, Linda and the crew are top notch professionals. They waterproofed an outside deck at our building in San Francisco and did an A+ job. They were on time and very responsive to my needs and the ...
I recently hired Star Waterproofing to waterproof my 3 outdoor decks in S.F., they were leaking everywhere . With the amount of rain we have been receiving these past few years , I needed a specialis...
I recently hired Star to replace the flat commercial roof for an apartment building in Oakland (6,500 sq ft). I had an excellent experience from start to finish, and I'm glad to leave a glowing recomm...
Diablo Delta Painting
These guys are really professional and great at work . We are satisfied with their services including interior and exterior paint. They provide great quality of work.
Juan is dedicated to providing best in class service using quality products for a long lasting paint job. Great guy.
This review is for obtaining an estimate. Joseph was very responsive and professional! He was able to come give an estimate within an week of request. Was very friendly and respectful of the pandemic ...
Consider Star Waterproofing and Roofing if...
- ✓ You have active leaks in decks, balconies, or flat roofs that require diagnostic expertise to identify the source before repairs
- ✓ Your project involves specialized waterproofing systems like torch-down roofing, tar and gravel removal, or low-slope roof replacement
- ✓ You own a multi-unit property needing comprehensive exterior envelope work including both roofing and coordinated painting
- ✓ You value detailed project scopes and evaluations before work begins, particularly for complex moisture intrusion problems
Consider Diablo Delta Painting if...
- ✓ Your project is strictly interior or exterior painting with no roofing or waterproofing components involved
- ✓ You prioritize working with a deeply established contractor with over three decades of painting-specific experience
- ✓ You want straightforward residential painting services with responsive estimates and reasonable pricing
- ✓ Your property needs only cosmetic updates rather than structural or waterproofing repairs
Questions to Ask Before Hiring
- → If hiring Star for roofing work that includes painting coordination, ask who performs the painting and whether they're licensed separately
- → If hiring Diablo Delta and discovering water damage during surface prep, ask about their process for referring structural or roofing issues
- → Ask Star specifically about their leak investigation process and what diagnostic methods they use before proposing solutions
- → Ask Diablo Delta about their experience with exterior painting on homes with previous moisture problems and what surface prep they include
The Bottom Line
These contractors serve fundamentally different needs, making this less a comparison than a scope clarification exercise. If your project involves roofing, waterproofing, leak diagnosis, or deck systems, Star Waterproofing and Roofing is the appropriate contractor with relevant 8-year experience in those trades. If you need residential painting exclusively, Diablo Delta Painting offers substantially deeper expertise with 34 years focused entirely on that craft. Only choose between them if your project truly spans both trades and you're deciding whether to use Star's coordinated approach or hire Diablo Delta separately for painting alongside another roofing contractor. Define your scope clearly before contacting either company.
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Frequently Asked Questions
Star Waterproofing and Roofing handles both roofing and coordinates exterior painting as part of broader building envelope projects, based on customer reviews mentioning coordinated painting work. Diablo Delta Painting focuses exclusively on painting and does not provide roofing services. If you need both, Star may manage the full scope, while hiring Diablo Delta would require a separate roofing contractor.
Yes, significantly. Diablo Delta's 34 years in the painting trade means deeper expertise in surface preparation, paint system selection, and handling complications specific to painting work. Star's 8 years of experience is in roofing and waterproofing, not painting as their primary trade. For painting-only projects, Diablo Delta's veteran status in that specific field is the relevant advantage.
Star Waterproofing and Roofing is specifically noted for leak diagnosis expertise, with customer feedback highlighting their ability to identify difficult leak sources and propose detailed solutions for deck and balcony waterproofing. Diablo Delta Painting does not offer waterproofing or diagnostic services for moisture intrusion. For leak investigation, Star is the appropriate choice.
That's a reasonable approach if you want specialist expertise in each trade. Star would handle the roofing and waterproofing with their technical knowledge of building envelope systems, while Diablo Delta would bring 34 years of painting-specific experience to the finish work. Alternatively, ask Star about their painting coordination process, as some reviews mention they manage exterior painting as part of comprehensive projects, which could simplify scheduling and responsibility.
Looking for the Best?
See our ranked list of top painting contractors in Contra Costa.
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How We Compare Contractors
License Verification
All license data is sourced from official California CSLB records and verified regularly.
Review Analysis
Customer reviews are aggregated from Google and analyzed to identify patterns in service quality.
Detailed Comparison
We analyze credentials, insurance, experience, and feedback to highlight meaningful differences.
Not all licensed contractors are created equal. While a valid license is the baseline requirement in California, contractors can vary significantly in experience, insurance coverage, and customer satisfaction.
- Experience matters: A contractor with 15+ years of experience has likely encountered and solved problems that newer contractors haven't faced yet.
- Workers' compensation protects you: If a contractor without workers' comp insurance has an employee injured on your property, you could be held liable.
- Reviews reveal patterns: Individual reviews can be misleading, but patterns across many reviews often reveal a contractor's true strengths and weaknesses.
- Bond amounts vary: A contractor's bond provides financial protection if they fail to complete work as agreed. Higher bonds offer more protection.
Taking time to compare contractors on these factors can save you from costly mistakes and help ensure your project is completed by a qualified professional.
Data Sources: License information from California CSLB. Ratings and reviews from Google. Last verified March 12, 2026.
This comparison is based on publicly available information. We recommend getting multiple quotes and verifying all credentials directly before hiring.
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