Thor Contracting Corporation vs Star Waterproofing and Roofing
East Bay Roofing Comparison · Updated January 2026
| Thor Contracting Corporation | Star Waterproofing and Roofing | |
|---|---|---|
| Rating | ★ 4.9 | ★ 4.3 |
| Years Licensed | 4 years | 8 years |
| License # | 1093228 | 1036279 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | El Sobrante, CA | Walnut Creek, CA |
| Website | thorcontractingcorporation.com | www.starwaterproofingco.com |
Our Analysis
Star Waterproofing and Roofing is located in Walnut Creek (Contra Costa County) and has been licensed for 8 years with an active status. Reviews commonly describe the company as knowledgeable in diagnosing leaks and providing detailed estimates. Feedback also references work on decks, balconies, and flat or low-slope roofs, including projects for multi-unit and commercial buildings. Customers mention professionalism, timeliness, and efforts to protect surrounding areas during construction, and some reviews note follow-up support after completion. Unlike Thor’s consistently positive summary, Star’s feedback includes a few reports of dissatisfaction related to communication or service experiences.
Both companies list workers’ compensation coverage and a $25,000 bond, supporting baseline jobsite risk and compliance expectations.
Why choose Thor Contracting Corporation?
- ✓ You want a contractor frequently referenced for residential roof repairs, installation, and maintenance.
- ✓ Coordination with inspections and permits is important for your project timeline.
- ✓ You prefer a process described as organized, with clear scope and pricing communication.
- ✓ You are located in or near Contra Costa County, or are open to arranging work beyond the immediate area based on availability.
Why choose Star Waterproofing and Roofing?
- ✓ You need help diagnosing a leak and want detailed explanations and estimates before proceeding.
- ✓ Your project involves decks, balconies, or flat/low-slope roofing, including multi-unit or commercial properties.
- ✓ You value jobsite practices that protect surrounding areas during construction and may want follow-up support after completion.
- ✓ You are comfortable confirming communication expectations up front, given that some customers reported concerns in that area.
Get a Quote
What do you need help with?
When do you need this done?
Where should we send quotes?
Confirm Submission
By submitting, you agree to be contacted by a licensed contractor.
Frequently Asked Questions
Yes. Both list an active license status, workers’ compensation coverage, and a $25,000 bond.
Thor Contracting Corporation is commonly referenced for residential roofing work such as repairs, installation, and maintenance.
Star Waterproofing and Roofing is noted in customer feedback for decks, balconies, and flat or low-slope roof projects, including multi-unit and commercial buildings.
Thor Contracting Corporation is specifically mentioned as coordinating around inspections and permits in customer feedback.
Other East Bay Roofing Comparisons
Data Sources: License information from California CSLB. Ratings and reviews from Google. Last verified January 13, 2026.
This comparison is based on publicly available information. We recommend getting multiple quotes and verifying all credentials directly before hiring.