Mortensen Roofing & Gutters vs Star Waterproofing and Roofing
East Bay Roofing Comparison · Updated January 2026
| Mortensen Roofing & Gutters | Star Waterproofing and Roofing | |
|---|---|---|
| Rating | ★ 5.0 | ★ 4.3 |
| Years Licensed | 36 years | 8 years |
| License # | 583533 | 1036279 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Concord, CA | Walnut Creek, CA |
| Website | www.mortensenroofing.com | www.starwaterproofingco.com |
Our Analysis
Star Waterproofing and Roofing is based in Walnut Creek and has 8 years of licensing history with an active license. Reviews frequently describe leak diagnosis and explanations of recommended repairs, along with detailed estimates and responsiveness during scheduling and execution. Customers also mention work on decks, balconies, and flat or low-slope roofs, including projects for multi-unit and commercial buildings. Feedback includes notes about professionalism, timeliness, and protecting surrounding areas during construction, as well as some reported dissatisfaction related to communication or service experiences.
Both companies list workers’ compensation coverage and a $25,000 bond, offering similar baseline compliance indicators in the provided data.
Why choose Mortensen Roofing & Gutters?
- ✓ You want a contractor in Concord with a long licensing history (36 years) and an active license.
- ✓ Your project is primarily residential roofing and/or gutter work, including repairs, maintenance, or replacement.
- ✓ You value a process described as straightforward, with clear communication and dependable scheduling.
- ✓ You have a targeted repair need (such as a leak) and want a contractor noted for follow-through and practical problem-solving.
Why choose Star Waterproofing and Roofing?
- ✓ You want a contractor based in Walnut Creek with an active license and 8 years of licensing history.
- ✓ Your scope includes waterproofing-adjacent areas such as decks or balconies, or flat/low-slope roofing.
- ✓ You prefer detailed estimates and a contractor described as responsive during scheduling and execution.
- ✓ Your property is multi-unit or commercial and you want a company customers mention for those project types, while noting feedback includes occasional communication concerns.
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Frequently Asked Questions
Yes. In the provided data, both Mortensen Roofing & Gutters and Star Waterproofing and Roofing carry workers’ compensation coverage and list a $25,000 bond.
Mortensen Roofing & Gutters has 36 years of licensing history, while Star Waterproofing and Roofing has 8 years of licensing history. Both are listed as having active licenses.
Star Waterproofing and Roofing. Customer feedback mentions work on decks, balconies, and flat or low-slope roofs, including multi-unit and commercial projects.
Mortensen Roofing & Gutters is based in Concord, and Star Waterproofing and Roofing is based in Walnut Creek.
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.