Northern California
Commercial Roof Inspection and Maintenance in Northern California
Our scan and maintenance programs reach 21 Northern California cities, from wine country plants in the North Bay to port warehouses in the East Bay, tech campuses in the South Bay and dense commercial blocks in the West Bay.
What kinds of commercial buildings are in Northern California?
Northern California commercial roofs in our 21 cities fall into 4 broad groups: port and freeway warehouses, research and tech campuses, food and beverage plants, and older downtown commercial blocks.
The East Bay holds most of the logistics space near the Port of Oakland and along Interstate 880. The South Bay and the Peninsula carry low-rise office and research buildings with crowded rooftop equipment. The North Bay mixes wineries, breweries and light industry, while San Francisco itself is mostly older mid-rise buildings with small, busy roofs.
- North Bay: Santa Rosa, Napa, Vallejo, Fairfield and Vacaville, with food, beverage and biotech plants
- East Bay: Oakland, Berkeley, Hayward, Fremont and Concord, with port logistics and manufacturing
- South Bay: San Jose, Santa Clara, Sunnyvale, Mountain View and Milpitas, with tech and research campuses
- West Bay: San Francisco and the Peninsula cities from Daly City to Palo Alto and Menlo Park
| Building type | Common roof system | Typical age | What Northern California does to it |
|---|---|---|---|
| Port and freeway warehouses | White TPO or built-up roof | 10 to 40 years old | Salt air and diesel soot near the water |
| Tech and research campuses | TPO or PVC with heavy rooftop equipment | 10 to 30 years old | Foot traffic and penetrations around HVAC |
| Food and beverage plants | Spray foam or modified bitumen | 15 to 40 years old | Process exhaust and condensation from cold rooms |
| Older urban commercial blocks | Built-up roof or modified bitumen | 30 to 60 years old | Parapet and flashing leaks on small roofs |
What does the Northern California climate do to a flat roof?
Northern California weather splits into 2 patterns for a flat roof: cool marine air and fog near the water, and hot, dry summers inland.
Roofs close to the bay stay damp for long stretches and pick up salt, which works on fasteners, flashings and seams. Inland cities such as Vacaville, Concord and San Jose see summer heat above 90 degrees that ages membranes and dries out sealants. Most rain arrives between November and March, so the first storms of the season expose clogged drains and open seams all at once.
How often should a Northern California commercial roof be inspected?
A Northern California commercial roof should be inspected at least 2 times a year, once in spring and once in fall before the first winter storm.
Roofs near the water or under heavy rooftop equipment benefit from a third visit after the wettest part of winter. Owners in wildfire smoke zones should add a check after any season with heavy ash fall. Our commercial roof inspection page explains what each visit covers.
What does a maintenance program cost in Northern California?
A maintenance program for a 100,000 square foot light industrial building in Northern California costs $22,000 to $25,000 a year on our Protect program, priced at $0.22 to $0.25 per square foot with a $2,500 minimum.
Protect fits most Northern California portfolios because 2 visits a year plus storm checks match the winter rain pattern across all 4 sub-regions. Every tier and what it includes is on the maintenance programs and pricing page.
Calculated from our published rates: Monitor $0.12 to $0.15 per square foot a year with a $1,500 annual minimum, Protect $0.22 to $0.25 per square foot a year with a $2,500 annual minimum, Manage $0.40 to $0.45 per square foot a year with a $4,500 annual minimum.
How soon can you scan a roof in Northern California?
We can scan a roof in Northern California as soon as roof access is confirmed after your request, and a 100,000 square foot light industrial building takes about 2 hours at roughly 50,000 square feet an hour, with the PE-stamped report delivered within 48 hours.
We plan Northern California scans around access, bridge and freeway traffic, and building operations, and we group nearby buildings into one trip where we can. Start with our roof scan request form, or compare every county on the service areas page.
Which Northern California cities do you serve?
We serve the 21 Northern California cities below, grouped into 4 sub-regions, and each one has its own page with the local building stock, climate and permitting.
Permits for roof repair and replacement come from each city building department, and coastal and historic areas can add review steps.
North Bay
East Bay
South Bay
FAQs
Do you work in every Northern California city?
We work in the 21 cities with pages on this site and can often add nearby cities to a scheduled route; call (310) 647-7192 to check an address.
Do Northern California leads go to a different office?
No. Every scan request goes to the same team through the same request form, wherever the building is.
Do prices differ in Northern California?
No. Monitor, Protect and Manage use the same published rates and minimums everywhere we work.
Can one program cover buildings in several Northern California cities?
Yes. One program can cover every building in a portfolio, with reports in the same format for each roof.
Which counties do the Northern California city pages cover?
The 21 city pages sit in Sonoma, Napa, Solano, Alameda, Contra Costa, Santa Clara, San Francisco and San Mateo counties, and we also accept requests from Marin County.
Do you scan roofs on tech campuses with dense equipment?
Yes. Dense rooftop equipment slows the scan a little, but every square foot between units is covered.
How do fog and marine air affect a scan?
A wet roof surface can delay a scan, so near the water we schedule after fog burns off or on a dry day.
Do you work on sloped roofs in Northern California?
No. We work only on commercial flat and low-slope roofs.
How long does a roof scan take on a light industrial building in Northern California?
A roof scan on a 100,000 square foot light industrial building in Northern California takes about 2 hours at roughly 50,000 square feet an hour, and the PE-stamped report follows within 48 hours.
Which Northern California cities have their own page?
Northern California has 21 city pages on this site: Santa Rosa, Vallejo, Fairfield, Vacaville, Napa, Berkeley, Oakland, Fremont, Concord, Hayward, San Jose, Sunnyvale, Santa Clara, Mountain View, Milpitas, San Francisco, San Mateo, Daly City, Redwood City, Palo Alto, Menlo Park.
Schedule a non-destructive roof scan anywhere in Northern California.
Trusted since 1983 on over 20,000 commercial roofs. California License 435836.