Gilroy Roof Pros provides professional chimney flashing in Gilroy, CA for residential and commercial properties across the South Santa Clara Valley. Two kinds of chimney sit on Gilroy roofs and they fail in completely different ways. Most houses built since 1990 carry a metal flue sitting inside a stucco-clad framed chase. The older stock nearer downtown has real masonry. Diagnosis starts with knowing which you have.
On a framed chase the leak is almost never the flue itself. It is the chase cover, which on tract construction is often light galvanized sheet with a flat top that ponds, rusts through at the low point and drips down inside the chase for years. Or it is the stucco, which is not waterproof and was always relying on a barrier and flashing detail behind it that nobody has inspected since the house was built.
On masonry the leak is usually the counterflashing. Surface-mounted metal bedded in sealant and screwed to the brick has a service life measured by the sealant, not by the metal, and sealant does not last thirty years in this sun. Done properly, counterflashing gets let into a saw-cut reglet or a raked mortar joint, wedged, and then sealed as a secondary defense rather than the primary one.
Either way the work below it is the same, and the city sets a floor on it. Flashing at all wall and roof intersections has to be a minimum of 26-gauge galvanized metal. Step flashing goes in shingle by shingle, never as a continuous L. A kickout at the bottom of the run sends water into the gutter instead of behind the wall cladding.
Any chimney wider than roughly 30 inches also gets a framed cricket on the uphill side, so the roof is not asked to dam water against masonry and hold it there. Tile adds a step nobody skips for free: the flashing has to sit under the tile field and over the underlayment, with a formed pan at the pan courses and closures at the ribs.
Getting that right means lifting a working area of tile rather than caulking a visible joint. If a previous repair is a stripe of sealant across the tile surface, that is the tell. One note on older masonry near downtown, too: a stack standing free above the roof line is mass at the highest point of a building, in a valley with a documented earthquake history.
Our licensed and insured team brings the right materials and equipment to every job — assembly weight in pounds per square foot including sheathing, standard-weight concrete tile at nine to eleven pounds per square foot, stone-coated steel formed in a barrel profile, 7/16-inch Exposure 1 sheathing with edge blocking at the panel joints, 26-gauge galvanized wall and roof intersection flashing, net free ventilating area at a one-to-150 ratio — and backs the work with a written workmanship warranty. We serve Gilroy and nearby communities including Morgan Hill, San Martin, Hollister, San Juan Bautista.
What We Handle
Everything our chimney flashing in Gilroy covers
One crew, one point of contact, and the full range of chimney flashing work in Gilroy, CA. If it is on this list we do it in house rather than handing it to a subcontractor:
- chimney flashing
- chimney leak repair
- chimney cricket
- counterflashing
- step flashing
- chimney chase cover
- stucco chase repair
- chimney roof leak
- flashing replacement
- masonry chimney flashing
- chimney flashing contractor
Not sure which one describes your situation? Describe it in plain words and we will sort it out — or browse the rest of our Gilroy services.
Materials, equipment and how we do chimney flashing
The difference between chimney flashing that lasts and chimney flashing that gets redone in three years is almost always preparation and materials, not the finish you see on day one. We work with assembly weight in pounds per square foot including sheathing, standard-weight concrete tile at nine to eleven pounds per square foot, stone-coated steel formed in a barrel profile, 7/16-inch Exposure 1 sheathing with edge blocking at the panel joints, spec them to the job instead of to the invoice, and write the material grades into the free estimate so you know exactly what you are buying.
Every Gilroy job runs the same way: site walk and measurements, written scope and fixed price, protection of the surrounding area, then the work itself with a daily clean-up. Years of roofing work in the South Santa Clara Valley means we have already met whatever your property is going to throw at us — awkward access, older construction, an HOA with opinions.
Where we do chimney flashing outside Gilroy
Gilroy Roof Pros covers Gilroy and the surrounding communities of the South Santa Clara Valley. Crews run out to the same nearby cities every week, so an out-of-town job does not mean an out-of-town price.
- Chimney Flashing in Morgan Hill, CA — Santa Clara County, population 45,483
- Chimney Flashing in San Martin, CA — Santa Clara County, population 7,008
- Chimney Flashing in Hollister, CA — San Benito County, population 41,678
- Chimney Flashing in San Juan Bautista, CA — San Benito County, population 2,089
- Chimney Flashing in Ridgemark, CA — San Benito County, population 3,212
- Chimney Flashing in Tres Pinos, CA — San Benito County, population 443
Start on the Gilroy Roof Pros homepage for a free estimate, or call (844) 511-2320 and describe the job.
Why Gilroy Chooses Gilroy Roof Pros
- ✓We work out the load before we quote the covering, because Gilroy's permit desk does the same thing
- ✓Two priced options on every replacement, one like-for-like and one lighter, each with its weight shown
- ✓We will argue you out of tile when the framing does not support it, and lose the bigger sale
- ✓Layer count and pitch measured plane by plane, not estimated from the driveway
The standards behind chimney flashing
Quality here is not a matter of opinion — it is written down. The chimney flashing work we do in Gilroy follows published industry standards: NRCA publishes the Roofing Manual, the industry's reference for details and slope minimums, and Asphalt Roofing Manufacturers Association sets the shingle application and ventilation guidance the warranties reference. If a contractor cannot tell you which standard a detail comes from, that is worth asking about before you sign.
Every chimney flashing project in Gilroy gets the same attention, whether it is a single room or a full commercial job. We show up on schedule, keep the site clean, and stand behind the work — the estimate is free and there is no pressure.
Ready to get started? Call (844) 511-2320 for a free chimney flashing free estimate in Gilroy, or request a quote and we'll get right back to you.