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Acker Roofing vs Star Waterproofing and Roofing
Contra Costa Roofing Contractors Comparison · Updated March 2026
Acker Roofing brings 12 years of licensure and proven versatility across traditional roofing projects, while Star specializes in waterproofing and leak diagnosis for decks, balconies, and flat roofs.
| Acker Roofing | Star Waterproofing and Roofing | |
|---|---|---|
| Rating | ★ 4.9 | ★ 4.3 |
| Years Licensed | 12 years | 8 years |
| License # | 993338 | 1036279 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Concord, CA | Walnut Creek, CA |
| Website | ackerroofing.com | www.starwaterproofingco.com |
Key Differences
What Customers Say
Acker Roofing
Acker Roofing customers consistently praise responsive communication, thorough inspections with clear explanations, and professional coordination across complex projects involving permits, solar integration, and weather scheduling.
Star Waterproofing and Roofing
Star Waterproofing customers highlight the company's diagnostic expertise for difficult leaks, detailed project proposals, and professional execution on waterproofing and flat roof systems, with many becoming repeat clients.
Key Takeaway: Acker's reviews emphasize coordination capability and consistent follow-through across varied roofing projects, while Star's reviews focus on specialized leak-finding skill but include occasional mentions of missed follow-up communication.
Customer Reviews
Acker Roofing
They are quick to respond and have work quality they honor the work warranty no questions asked why rain or shine they come to repair
Acker Roofing did a great job of replacing our roof. They listened to my specific needs, found a good solution, and troubleshooted problem areas. They were able to fit us into their schedule and the j...
Dean and Acker came recommended to us by a State Farm insurance agent, and we can see why. Dean quickly turned around a fair quote for roofing our house. Rodigo and his partner worked diligently on ev...
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...
Consider Acker Roofing if...
- ✓ Your home has a traditional pitched or sloped roof needing repair, replacement, or tear-off work, which aligns with Acker's primary project history
- ✓ You need coordination with solar companies for panel removal and reinstallation, a capability customers specifically mention in Acker's reviews
- ✓ Your project involves permitting, insurance documentation for renewals, or storm damage claims where Acker's 12 years of experience navigating those processes adds value
- ✓ You want a contractor with a consistent track record of responsiveness and follow-through, as Acker's reviews don't flag communication gaps
Consider Star Waterproofing and Roofing if...
- ✓ You have a flat roof, low-slope roof, or torch-down system that needs replacement or repair, matching Star's specialized experience
- ✓ Your project involves deck or balcony waterproofing, leak investigation around outdoor living spaces, or complex envelope troubleshooting where Star's diagnostic expertise is the core strength
- ✓ You own a multi-unit property or have larger commercial-style roof areas, which appear more frequently in Star's project history
- ✓ You're willing to confirm follow-up protocols upfront, given occasional reports of missed callbacks, to ensure post-completion support meets your expectations
Questions to Ask Before Hiring
- → For Star Waterproofing: Ask about their warranty response process and how they handle follow-up requests after project completion, given occasional reports of missed callbacks
- → For Acker Roofing: If your project involves flat roofing or waterproofing systems, ask about their specific experience with those applications compared to their pitched roof focus
- → For both: Request references from projects matching your specific roof type and scope to confirm their crew's familiarity with your situation
The Bottom Line
If you have a traditional pitched roof needing repair or replacement—especially if your project involves solar coordination, permitting, or insurance documentation—Acker Roofing's 12 years of experience and clean track record on those exact projects make it the stronger choice. Choose Star Waterproofing and Roofing if your primary need is deck or balcony waterproofing, flat roof work, or complex leak diagnosis on low-slope systems where their specialized expertise directly applies. Both are properly insured and bonded, but confirm follow-up protocols with Star given occasional communication gaps, and verify Acker's flat-roof experience if that's your project type.
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Frequently Asked Questions
It depends on your roof type and project complexity. Acker's 12 years means more experience diagnosing hidden damage on older roofs, handling permit complications, and coordinating multi-trade projects like solar integration. For straightforward flat roof or waterproofing work, Star's 8 years is sufficient, especially given their specialized focus in those areas. The experience gap matters most for complex pitched roof projects with potential complications.
This is the core tradeoff. Acker has stronger experience with pitched roofs but handles leak troubleshooting broadly. Star specializes specifically in deck waterproofing and flat systems but works on conventional roofing too. If the deck is your primary concern, Star's waterproofing expertise is the better match. If the pitched roof is the main issue and the deck is secondary, Acker's broader experience and coordination strength make more sense.
Some customers reported difficulty getting callbacks after project completion, which could affect warranty service or addressing punch-list items. This doesn't appear in every review, but it's worth discussing their warranty process and response commitments upfront. Ask for a written warranty protocol and confirm the best way to reach them if issues arise after completion.
Acker is based in Concord and Star in Walnut Creek, both serving the same region. Location isn't a meaningful differentiator here. Focus instead on which company's project history and specialization match your specific roof type and scope, as that will affect quality and efficiency far more than a few miles of travel distance.
Looking for the Best?
See our ranked list of top roofing 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 11, 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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