Business Details
31 Years
experience
Emergency
services
Commercial Roofing Experts in San Jose
Just Leaks was founded in 1995 by Scott Siemer and has since become a trusted leader in commercial and industrial roofing services across the San Francisco Bay Area. Our team brings decades of combined experience in roof repair, maintenance, and installation, supported by continuous training and technical expertise. We specialize in tailored solutions for cool roofs, drainage correction, equipment tie-ins, and waterproofing, serving both public and private sectors. As a licensed general building and roofing contractor in California, we maintain rigorous safety standards and offer 24-hour emergency leak repair services.Our commitment to transparency includes detailed documentation of all work performed, featuring comprehensive reports and photographic evidence. With operations spanning San Francisco, San Mateo, Santa Clara, Santa Cruz, Monterey, San Benito, and Alameda counties, we have earned our reputation as the leading roofing service provider in San Jose through reliability, professionalism, and customer-centric service.
Services
Leak Repair
Roof Maintenance
Cool Roofs
New Roof Installation
Drainage Correction
Deck Waterproofing
Roof Assessment
Details
- Year established: 1995
Highlights and features
- We operate as a licensed general building and roofing contractor in California.
- We provide 24-hour emergency leak repair service for business continuity.
- Our teams receive ongoing training to maintain high craftsmanship standards.
- We offer detailed documentation including photographic reports of completed work.
- We serve diverse commercial and industrial clients across seven Bay Area counties.
What people say
Exceptional service
Detailed reports with photos
Prompt emergency response
Competitive pricing
Reliable and trusted
Services
Leak Repair
Our team offers 24-hour emergency leak repair services for commercial and industrial roofs. With experienced technicians, we perform thorough diagnostics, customized solutions, and comprehensive documentation including detailed reports and photographic evidence. Clients receive clear explanations of all repairs performed, ensuring transparency and long-term roof integrity while minimizing business disruption.
Cool Roof Systems
Just Leaks specializes in installation and maintenance of cool roofing systems that reduce heat absorption and energy costs. Our team works with commercial properties including office buildings, schools, and municipal facilities, providing solutions that combine sustainability with durability. Each project includes detailed condition assessments and photographic documentation to ensure optimal performance and client understanding.
New Commercial Roofs
We design and install new commercial roofing systems tailored to building specifications and operational needs. Our services cover TPO, AcryPly, and SPF systems, with integrated drainage solutions and equipment tie-ins. Clients benefit from comprehensive inspections, customized proposals, and detailed reporting throughout the installation process to ensure quality and compliance with building requirements.
Roof Drainage Correction
Our drainage correction service addresses standing water issues through three methods: installing new roof drains, creating slope adjustments with spray foam, or reinforcing existing membranes. Each solution is designed to extend roof lifespan while minimizing ponding. We complete most drain installations within a single day, ensuring minimal disruption to client operations.
Roof Assessments
Just Leaks provides detailed roof condition assessments with photographic documentation and repair recommendations. Our roof assessments include comprehensive reports showing current conditions, identified defects, and suggested maintenance plans. These evaluations help property managers make informed decisions about roof maintenance and capital improvements without charging clients for the assessment service.
People
Scott Siemer
Founder
Scott Siemer founded Just Leaks in 1995 after obtaining his general building contractors license in 1984 and gaining extensive construction experience. He specializes in commercial roofing systems, with particular expertise in cool roofing technologies developed over ten years of service.
Hector Flores
Current Owner
Hector Flores became owner in 2023 after working with Just Leaks for 19 years. He brings deep operational knowledge and continues the companys tradition of excellence in commercial roofing services across the Bay Area.
Craig Siemer
Production Manager
Craig Siemer serves as production manager, overseeing job execution with extensive construction experience. He manages crews to ensure project efficiency and maintains the companys high standards across all roofing services provided.
Questions
Do you offer emergency roof repair services?
Yes, we provide 24-hour emergency leak repair services for commercial and industrial roofs across the Bay Area.
What types of roofing systems do you work with?
We service all commercial roofing systems including TPO, AcryPly, SPF, and traditional built-up roofs with cool roof options.
Which areas do you serve?
We primarily serve San Jose and the entire San Francisco Bay Area including Santa Clara, Alameda, and Monterey counties.
How do you document completed work?
All services include detailed reports with photographic documentation of conditions found and repairs performed for complete transparency.
Are your services available for public sector projects?
Yes, we work with both private and public sector clients, including projects with prevailing wage requirements and municipal buildings.
Reviews (3)
Robin Hau
Jun 03, 2020
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They performed excellent work on addressing the issues and extending the life of the roof of our new building.
Alex Z.
Sep 20, 2016
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I am surprised to not find more 5 Star reviews for this company. They redid my commercial roof in Campbell in 2012 and said there was a 10 year warranty. I was very pleased with the initial job and their price was very competitive. They have been very responsive to any issue since then and when we thought there was a leak developing at a roof hatch in August 2016, they came right out, repaired it and took photos of the repairs. Sent me a 'no charge' invoice with all materials and labor time itemized. Very impressive to see a company that really stands behind their workmanship.
Daniel E.
Apr 06, 2015
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This company is very outstanding. They are always honest and up-front, very accommodating to tenant's and customer's needs and wants, and the work they do is top notch. Along with that, when you're done, they will give you a detailed invoice with color photos of the work performed. Keep up the great work!
