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Modified Bitumen Roofing in San Jose, CA

Highland Commercial Roofing installs and repairs modified bitumen roofing systems engineered for San Jose's two-season climate, giving properties layered, redundant protection through wet winters and UV-heavy summers.
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Emergency Leak Service

Modified Bitumen Roofing for San Jose's Climate

San Jose’s climate swings between two distinct seasons: months of intense UV exposure followed by winter storms that can bring sustained, heavy rainfall off the Pacific. Modified bitumen handles the shift well because it’s built from multiple bonded layers rather than a single membrane, so if the top layer takes UV or weather damage over time, the roof still has backup protection underneath. This makes it a solid option for commercial roofing services in San Jose, particularly for tech campuses and healthcare facilities where rooftops are often crowded with HVAC units, solar arrays, and other equipment. 

The granulated surface holds up to the foot traffic that comes with regularly servicing that equipment, without the punctures or wear that can affect thinner single-ply systems. Highland Commercial Roofing has installed and maintained modified bitumen roofs across the for 35 years, and our crews evaluate each building’s fire code classification, deck type, and rooftop equipment load before recommending an application method.

How does modified bitumen hold up during San Jose’s rainy season?
Modified bitumen’s multi-layer construction gives it built-in redundancy that helps it resist water infiltration during San Jose’s wet winter months. Even if the surface layer sustains minor wear, the underlying plies provide continued protection. Highland recommends inspections two times a year to check for issues including seams, flashings, and drainage, catching small issues before they compound during sustained storms.
Is modified bitumen a good fit for tech campuses with rooftop equipment?
Yes. Its granulated cap sheet offers strong resistance to foot traffic and impact, making it well-suited to roofs carrying HVAC units, solar installations, or other equipment common on tech campuses. The system’s durability under repeated foot traffic helps protect the membrane during routine equipment servicing.
Will my building need a full tear-off, or can modified bitumen go over the existing roof?
It depends on how many layers are already in place. Title 24, Part 2 of California’s building code limits roofs to two covering applications, so a building at that limit needs a full tear-off before a new system goes down. Highland checks layer history against California’s reroofing requirements before recommending a recover or replacement.
Does Highland handle emergency modified bitumen repairs in San Jose?
Yes. Highland provides emergency leak service and repair for modified bitumen systems throughout San Jose. Common issues include seam separation, blistering from UV exposure, and flashing failures around rooftop penetrations. Technicians diagnose the leak source and repair the affected layer without disturbing the surrounding system.

 

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A commercial roof in the middle of one of the most common types of commercial roof repairs

San Jose's Modified Bitumen Roofing Specialists

As an eight-time Guildmaster Award winner for Service Excellence, Highland Commercial Roofing brings proven craftsmanship to modified bitumen projects throughout San Jose and the greater. Our team works with tech campuses, healthcare facilities, office buildings, industrial properties, schools, and multi-family residential buildings, covering the full lifecycle of a roofing system from asset assessment and budgeting through installation, preventative maintenance, and emergency response. 

We also support tenant improvement projects and assist with insurance claims tied to storm-related damage. Our crews are experienced with both torch-applied and self-adhered application methods, selecting the right technique based on building type and local fire code requirements. Contact us today to schedule a modified bitumen roofing assessment for your San Jose property and see how a properly installed multi-layer system holds up through the Bay Area’s rainy winters and sunny summers alike.

Northern California Roofing Services

Highland is your complete roofing contractor for all re-roof, maintenance, repair and roof asset management services in Northern California. Our experienced roofer California team is dedicated to providing reliable, high-quality roofing solutions. As one of the top roofing companies in California, we specialize in everything from minor repairs to complete roof replacements, ensuring your roof stays strong and secure year-round. We take pride in being the go-to choice for Northern California roofers, delivering exceptional service and results you can trust.

Asset Assessment & Budgeting
Commercial Re-Roof
Emergency Leak Service / Roof Repair
Preventative Maintenance
Proactive Roof Asset Management
Tenant Improvements
The Highland Difference
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Todd Bender
Regional Vice President, Northern California

Your Local Expert

Todd Bender has been with Highland Commercial Roofing (HCR) for 15 years, currently serving as the Vice President for Northern California. He joined HCR after being recruited from his previous employer.

Todd values the teamwork and respect among HCR’s employees and appreciates the company’s customer-focused approach. He takes pride in offering tailored solutions that meet customers’ specific needs.

Over the past 15 years, Todd has significantly contributed to both sales and operations, witnessing and facilitating HCR’s growth from a local contractor to a regional powerhouse.

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Address

2690 Alvarado Street,
San Leandro, CA 94577
License #: C-39-932049

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