San Mateo Roof Pros provides professional chimney flashing in San Mateo, CA for residential and commercial properties across the Peninsula. Grinding a reglet into a chimney is standard practice everywhere and it is the wrong move on a large share of San Mateo brick. Anything laid before roughly 1930 here is bedded in soft lime mortar, and a diamond blade removes far more than the joint it was aimed at.
Telling the difference costs nothing but a minute on the roof. Lime mortar scratches with a house key, reads warm and sandy rather than gray and glassy, and was deliberately made softer than the brick around it so that movement and salt damage land in the joint instead of in the face of the brick. Hard Portland repointing from the seventies looks and behaves nothing like it under a blade.
Where the mortar is soft we surface-mount the counterflashing, bedded in a sealant compatible with lime and fastened into the brick face with stainless rather than cut into the bed joint. Where a previous owner repointed in Portland, a shallow two-piece reglet is perfectly fine and that is what we use. The chimney decides which one it gets, not the habit of the crew.
None of that is where the roof actually stops water anyway, which is worth saying clearly. The base flashing does that work. Step flashing set in one course at a time on both flanks, a soldered apron across the front, and a cricket framed in behind anything wider than thirty inches so that runoff is split and shed rather than parked against masonry for an entire wet season at a time.
We are clear about where our scope stops. We flash chimneys. We do not reline them, rebuild them or repair a spalling face, and when the crown is cracked or the stack has visibly shifted we will tell you to call a mason before you call us back. Flashing a chimney that is coming apart above the flashing is money spent in exactly the wrong order.
And if the chimney is scheduled to come down as part of a remodel, do not pay anybody to flash it at all. We will make it weather-tight for the interim, note it on the plan with a date, and put the real detail in when the roof around it is rebuilt. That is one more thing not paid for twice on the same house.
Our licensed and insured team brings the right materials and equipment to every job — Class B roof assemblies tested to ASTM E108, concealed-clip twenty-four-gauge Galvalume standing seam, dry-fix hip and ridge systems for clay barrel profiles, granule-surfaced SBS cap sheet over a self-adhered base ply, sixty-mil mechanically attached TPO over tapered polyisocyanurate, half-inch plywood re-sheathing over one-by-six board decking — and backs the work with a written workmanship warranty. We serve San Mateo and nearby communities including Burlingame, Millbrae, Hillsborough, Foster City.
What We Handle
Everything our chimney flashing in San Mateo covers
One crew, one point of contact, and the full range of chimney flashing work in San Mateo, CA. If it is on this list we do it in house rather than handing it to a subcontractor:
- chimney flashing san mateo
- chimney leak repair san mateo ca
- counterflashing repair san mateo
- chimney cricket san mateo
- step flashing chimney peninsula
- brick chimney roof leak san mateo
- lime mortar chimney flashing san mateo
- chimney saddle roofing san mateo
- chimney reflashing san mateo
- masonry chimney roof repair san mateo
- chimney flashing contractor san mateo county
Not sure which one describes your situation? Describe it in plain words and we will sort it out — or browse the rest of our San Mateo 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 Class B roof assemblies tested to ASTM E108, concealed-clip twenty-four-gauge Galvalume standing seam, dry-fix hip and ridge systems for clay barrel profiles, granule-surfaced SBS cap sheet over a self-adhered base ply, 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 San Mateo 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 Peninsula 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 San Mateo
San Mateo Roof Pros covers San Mateo and the surrounding communities of the Peninsula. 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 Burlingame, CA — San Mateo County, population 31,386
- Chimney Flashing in Millbrae, CA — San Mateo County, population 23,216
- Chimney Flashing in Hillsborough, CA — San Mateo County, population 11,387
- Chimney Flashing in Foster City, CA — San Mateo County, population 33,805
- Chimney Flashing in Belmont, CA — San Mateo County, population 28,335
- Chimney Flashing in San Carlos, CA — San Mateo County, population 30,722
Start on the San Mateo Roof Pros homepage for a free estimate, or call (844) 511-2320 and describe the job.
Why San Mateo Chooses San Mateo Roof Pros
- ✓Every plane on your roof gets a number, a remaining-life range, and a note on whether your remodel is going to demolish it
- ✓We write down which counter your job goes to and what that path costs in weeks, because here the calendar binds before the material does
- ✓The repair-now scope and the replace-with-the-remodel scope are quoted side by side, and we say which one we would buy
- ✓On soft lime mortar we surface-mount counterflashing rather than grind a reglet into a joint that will not survive the blade
The standards behind chimney flashing
Quality here is not a matter of opinion — it is written down. The chimney flashing work we do in San Mateo 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 San Mateo 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 San Mateo, or request a quote and we'll get right back to you.