On office buildings in Ventura, skylights cause a share of leak calls far out of proportion to their size. A skylight sits on a raised curb, and water can get in at three different places: through the glass or frame, through the curb flashing, or through the membrane around the curb. Each one has a different fix. A roofer can reflash a curb all day long, but if the frame gasket is the problem, the ceiling tile will stain again after the next rain. So we look at the frame, the curb and the roof as separate pieces and tell you which one is actually letting water in.
Many office roofs around Downtown Ventura and Midtown Ventura also carry rooftop units, vents and a roof hatch within a few feet of each skylight, so we map those along with the occupied suites below before we suggest a repair area. It helps to know which skylights leak, which suites have reported stains and whether you have drawings or past repair invoices. If the glass or frame needs work, a glazing contractor handles it and we coordinate the timing. The property manager tells us which tenants need notice, when the roof hatch can be used and where material can be staged.
Skylight frame or roof flashing?
We start with a water test or a close inspection of the frame, the curb and the surrounding membrane. Our skylight and penetration flashing work covers the curb, counterflashing and the tie-in to the roof. Cracked domes, failed glazing seals and worn frame gaskets go to a glazing contractor, since that work is outside roofing. If the leak shows up away from the skylight, a broader commercial roof leak repair investigation traces it back to its source. We also check the roof hatch and any nearby vents, because a leak blamed on a skylight sometimes comes from a pipe boot a few feet upslope.
Getting the source right matters because skylight leaks fool people. Water can enter at a frame corner, run along the curb and drip several feet away inside. We mark each likely entry point and explain what we found. You get one estimate for the roofing work and a clear note on anything the glazing contractor should look at, with the order the two trades should work in.
Rebuilding the curb flashing
Skylight curbs on older office roofs often have short flashing, rotted wood nailers or membrane that has shrunk and pulled away at the corners. During flashing failure repair we strip the old base flashing, replace bad wood and check the curb height. If the curb is too low to flash properly, we may recommend raising it before new roofing goes on. Most manufacturers want flashing to rise several inches above the finished roof, and old curbs often fall short once a few layers of roofing have been added over the years.
The corners get the most attention, since that is where most curb flashing splits first. PVC and TPO roofs get welded corner pieces. Modified bitumen roofs get reinforced plies at each corner. The new flashing ties into sound membrane on every side, and a metal counterflashing or the skylight frame itself covers the top edge so rain runs over the repair instead of behind it. We also check the sealant at the frame and replace it if it has cracked or pulled loose.
Working above tenants
Office roof work happens over people's desks, conference rooms and server closets. Before we cut anything, we walk the floor below with the property manager. Our occupied-building reroofing plan covers noise, odor from adhesives, the route materials take through the building and where debris comes down. Loud work or strong-smelling products can be scheduled early in the morning or on weekends if the building needs it. We also check with the property manager whether rooftop air intakes need to be shut down while we use adhesives near them.
If a skylight repair means opening the roof, we cover furniture and floors below the work area, and the roof over that suite is sealed before quitting time. Should the curb hide more rot than we expected, the property manager sees it before we cut any wider. A larger opening can mean moving tenants out of a room for a day, and that decision belongs to the building, not to us. Tenants get notice from management, and we stick to the times we agree on.
Related Roofing Work
Skylight and Penetration Flashing
Commercial Roof Leak Repair
Flashing Failure Repair
Occupied Building Reroofing
When a larger roof project makes sense
If the roof around the skylights is old and has several leaks, patching each curb may not be the best use of money. A section reroof or full replacement can be a better choice, but it has side effects. New insulation raises the roof surface, and that can leave curbs, skylights and rooftop unit stands too short for proper flashing. Drains, scuppers and door thresholds onto the roof may need adjustment too. On a busy office roof, those small items can add up to a real share of the project cost, so we count them before giving a number.
We check those heights before recommending a bigger job. If skylights need to be raised or replaced to fit the new roof, the estimate says so. The building owner can then compare a targeted skylight repair with a larger project and see what each one includes. Either way, the price reflects the real work and not just the square footage of new membrane. If the budget only covers the worst skylights this year, we can phase the work so the rest of the roof stays watertight until the next round.
Closeout and maintenance notes
At closeout you get photos of each repaired curb, the new corners and flashing, and any area we opened and closed. Work still owed by the glazing contractor or a mechanical trade is listed separately, along with any temporary patch and why it is temporary. That gives the property manager a clear record for the next leak call and for tenant questions. We also note worn sealant or loose counterflashing we saw on other skylights, so they can go on the maintenance list before they leak. A short check of every skylight after the first big winter storm is a cheap way to catch small problems early.
Office roofs in Downtown Ventura often mix old and new skylights on one roof, so every curb gets its own look. Other building types need their own approach: data center roofing centers on expansion joints and equipment, while medical office roofing has to protect exam rooms and patient schedules. Every office roof gets its own number, based on its own skylights.
Common Questions
Will reflashing the curb fix a leaking skylight?
Only if the curb flashing is the source. If the frame, glass or gasket leaks, a glazing contractor needs to fix it. We check both and tell you which one is at fault.
What decides how much of the curb area gets torn out?
The condition of the membrane, insulation and wood around the curb. We cut back until we reach dry, sound material, then rebuild the flashing from there.
What happens for tenants if the roof opening gets bigger?
We stop and walk the area with the property manager first. Together we decide whether more rooms need to be cleared or covered, and the opening is dried in each day.
What should a future repair crew look at first on these skylights?
Our closeout photos and notes. They show which curbs were rebuilt, which skylights still need glazing work and where any temporary patches remain.
Schedule an office skylight inspection
Tell us which skylights leak and how tenants and roof access are handled. We will inspect the frames, curbs and surrounding roof and give you a clear estimate for the roofing work, plus any glazing or other trade work it depends on.