Local weather advisory
The National Weather Service has issued a coastal flood advisory covering Berkeley. Heavy rain and drainage loading can expose roof leaks, blocked drains, and ponding water. This is a weather exposure advisory; it does not establish damage to a specific roof.
Do not access a roof during hazardous weather. Protect people first, avoid water near electrical equipment, and request roofing help when conditions permit.
National Weather Service · Updated Oct 28, 2026, 7:20 AM UTC
Commercial roof repair in El Sobrante from our Berkeley crew: membrane punctures under conduit and pipe supports repaired, with the support problem fixed too.
Service Areas  | Berkeley, CA
A puncture in the membrane right under a run of conduit is a common find on commercial roofs. Usually a support has shifted, or the conduit itself is resting on the roof and rubbing through it every time it moves. Patch the hole without fixing that, and the same spot wears through again. We repair commercial roofs in El Sobrante from our base in Berkeley, CA, and we look at the roof and the support together before deciding what gets fixed first.
Commercial buildings along Appian Way, near the El Sobrante Library, and out along San Pablo Dam Road each get their own access check. We look at how the conduit is supported and how badly the membrane under it is damaged. If the conduit needs to be moved or re-supported, that is usually electrician work, so we find out who services it. Our membrane puncture repair work only holds if whatever caused the hole is dealt with.
Conduit supports can slide, tip or sink over time, and then the conduit or a bracket ends up resting on the membrane. Foot traffic and wind make it worse. We check how the support system is set up rather than assuming the membrane just failed on its own. If the conduit or its supports need to be adjusted, that is a job for the electrician or the service contractor, not the roofer. We point that out before planning the repair.
Our rooftop equipment and support work ties the membrane repair to how the conduit is held up. The patch needs room around the damaged spot, and if the conduit sits too low to work under, it may have to be lifted first. We explain what access we need and who has to provide it. The goal is a fixed membrane with the conduit set back on proper supports that do not cut into the roof again.
A hole in the membrane lets water into the insulation around it. We check the area around the puncture and compare it with where the leak shows up inside. There may be other worn spots under the same conduit run, so we walk the whole route and mark each one. If we need to take a small core to check whether the insulation is wet, we explain why before cutting.
When we do leak repair along a conduit run, we compare the damage on top with the room that is leaking. Water can travel along the deck before it drips, so the stain inside is not always below the hole. We note which spots we are confident about and which are still uncertain. That way the repair is based on what we found on the roof, not just on which conduit is closest to the stain.
A patch has to bond to clean, sound membrane well past the edge of the hole. Old caulk, dirt or brittle membrane around the puncture can push the patch edge farther out. We identify what type of membrane is on the roof and prep it the way that membrane requires. Nearby supports can leave little room to work, which may change the shape or size of the patch. We plan around that before ordering materials.
Our commercial roof repair work along conduit runs includes the surface prep, not just the patch. If the insulation under the hole is wet, it gets cut out and replaced before the new membrane goes on. Dry, solid insulation can stay. We show you photos of what we find when we open it up, and if the damage is bigger than expected, we explain why the repair area grew.
The conduit has to end up on supports designed for roof use, sitting where they will not dig into the membrane. The electrician or service contractor decides how the conduit should be supported; we make sure the supports and any protection pads suit the membrane and do not block drainage. Setting a support back down on the same spot that failed just starts the wear over again. We confirm the final setup with the facility manager and photograph it.
During preventive roof maintenance visits, we compare the supports with those completion photos. If a support has shifted or a protection pad is missing, we note it right away so it gets fixed before it wears another hole. That keeps maintenance focused on real changes on the roof rather than a generic checklist.
Repairing a puncture can mean opening the roof over an occupied room. We find that room and agree on how to protect it before cutting anything. If the electrician has to move conduit first, that affects scheduling too. We check how materials get up and how debris comes down, and we only open as much roof each day as we can close up before we leave.
A building on Appian Way gets its own delivery and staging plan, and the roof hatch or ladder location decides how materials reach the conduit run. Our reroofing over occupied buildings work includes protecting the space below. If you have buildings in Hercules or San Pablo as well, we can inspect them on the same trip, but each gets its own support check and repair plan.
We photograph the damaged membrane before the patch covers it, along with wider shots showing where it is on the roof. The final conduit support setup gets its own photo. On the next visit, anyone can compare those photos with what is on the roof. A new hole nearby is treated as a separate problem until we look at it.
One puncture next to otherwise sound roofing usually means a simple, focused repair. Several worn spots along the same conduit run suggest a bigger support problem that needs to be fixed along the whole route. We explain which one you have before recommending more work, and we tell you what we confirmed and what we are still unsure about.
Businesses along San Pablo Dam Road and Appian Way are spread out, so clear directions help on repeat visits. We confirm whether there is a shared driveway, a service gate or a steep approach before sending a crew. Water on a sloped roof can collect at a low corner even if the stain inside shows up somewhere else. If the building has additions with different roof types, we label each section separately on the roof plan so future maintenance does not treat them as one roof.
Have us walk the conduit run and check the damaged membrane. Our photos will show the roof damage and what needs to happen with the supports before we repair it.
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