Commercial Roof Repair in Campbell, CA

Commercial roof leak repair starts below the roof

Before we go up, we walk the interior with the property manager or tenant. Stained ceiling tiles, wet insulation above the grid, drips at light fixtures and rust on the underside of a metal deck all tell us where water is landing. We mark those locations on a sketch, then match them to what sits above: equipment, drains, walls and seams.

On a membrane roof over a metal or concrete deck, water can run along flutes or slopes for a long way before it drops. Knowing the interior pattern keeps us from patching the wrong spot and leaving the real entry point open.

Where commercial flat roofs actually leak

A commercial repair call can cover any detail in the table below, plus temporary protection while it rains and removal of dead equipment curbs that no longer serve a tenant.

Local weather sets the pattern. Long, dry summers bake sealant and stretch seams around equipment, then the first big November storm finds every opening at once. Street trees along older commercial corridors drop leaves into drains, and multi-day atmospheric rivers like the winter 2022-23 series keep water ponded long enough to reach weak laps.

Why do rooftop HVAC leaks happen so often?

Rooftop units concentrate everything a membrane dislikes. The curb is a box cut through the roof, flashed at a corner-heavy detail. Condensate lines drip onto the roof or clog and back up. Gas lines and conduits add more penetrations, often installed after the roofer left. And service technicians walk the same path every quarter, carrying tools and sometimes leaving access panels off so rain blows into the unit and down the duct.

A rooftop HVAC leak repair often means re-flashing the curb, re-routing a condensate line to a drain, sealing the unit's cabinet seams and adding walkway pads along the service route. When a unit has to be lifted or replaced, we coordinate with your mechanical contractor so the curb is flashed while it is exposed.

Parapet wall leaks and water inside the wall

A parapet leak can show up as a stain at the top of an exterior wall, a wet carpet along a window line or bubbling paint in a stairwell. Water enters through open joints in the metal coping, cracks in the stucco on the roof side of the parapet, or a base flashing that has pulled away, then runs down inside the wall cavity.

Repair usually involves removing the coping, installing a continuous membrane over the parapet top, re-setting the coping with sealed joints, and re-flashing the base where the roof turns up the wall. Cracked cladding on the inside face gets patched or covered with membrane so the wall is waterproofed from both sides.

Office, medical building and retail roof repairs

Office roof leaks

Offices along Winchester Boulevard and Hamilton Avenue often have years of tenant improvements on the roof: abandoned equipment curbs, old antenna mounts, extra exhaust fans. Removing and decking over dead penetrations eliminates leaks for good.

Medical building roof repair

Clinics cannot tolerate water near treatment rooms or records. We schedule work around patient hours, keep strong-smelling adhesives away from intakes, and give the property manager a clear account of what was done above which suite.

Retail roof leaks

Strip-center roofs collect restaurant exhaust grease, sign bolts and tenant-run conduit. Grease degrades many membranes, so we clean contaminated areas and patch with compatible material, and we may recommend grease containment around the fan.

Can you fix a leak another contractor couldn't?

Often, because repeat leaks usually mean the real entry point was never found. Our approach on a stubborn leak:

• Review prior repair records and photos, if the building has them.
• Remove layers of mastic and sealant that hide the original detail, so we can see the actual failure.
• Water-test suspect areas one at a time, starting low and working up, with someone watching inside.
• Repair the detail properly with membrane and metal rather than adding more sealant.

Our commercial work includes leak repair on medical and office buildings, where interiors stay occupied while the roof is opened and closed in sections.

What determines the cost of a commercial roof repair?

We price commercial repairs from what we find on the roof, not from a service-call menu. The estimate reflects:

• Leak source: a re-flashed pipe boot is a small line; a parapet coping rebuilt along a whole wall is not.
• Membrane type and age: aged TPO may need special prep before a patch will weld, and built-up roofs need new plies.
• Wet insulation: saturated boards around the leak are cut out and replaced, often found only with a core cut.
• Coordination: a mechanical contractor to lift a unit, or early-start access for a clinic.
• Access: roof hatch, ladder or lift, and hoisting material to a two-story roof.

Permits, licensing and code on commercial repairs

Routine repairs rarely need a permit, but replacing a large section can turn into a reroof that the City of Campbell or Santa Clara County permits and inspects, and then Title 24 cool-roof and insulation rules may apply. When in doubt, ask the building division before work starts. Repair contracts at or above $1,000 must go to a contractor with an active CSLB license, and C-39 is the roofing classification to look for.

Why building owners call us for commercial leaks

Xylo Fix Roofers is family-run, and commercial clients get the same treatment as homeowners: a free, written estimate with photos, an honest call on whether a repair or a bigger fix is the better spend, and a clean site at the end of each day. We take small jobs, such as one leaking curb or a rusted scupper, and keep the photo record complete so the next person on the roof knows what was done.

Commercial roof repair in Campbell, CA: service call to photo report

1. Call with the building address, the suite affected and how long it has been leaking; we let you know when a crew is available.
2. If rain is falling, we take temporary measures to slow the water and protect the interior.
3. We inspect the roof, find and photograph the entry point and any other defects nearby.
4. You get a written, itemized repair estimate; urgent items are separated from items that can wait.
5. After the repair, we send before-and-after photos for the property file.

When the inspection shows leaks spread across the roof, we price commercial roof replacement alongside the repair. Townhome and condo boards dealing with repeat leaks can see how we handle multifamily roof repair for associations.