On a campus that has grown in stages, a roof fails where one wing meets another. Two buildings of different ages expand, settle and age at their own pace, and the joint between their roofs is where the membrane gets pulled hardest. Huntington Hospital has grown that way: an east tower arrived in 1998, a west tower in 2008, and the emergency department was enlarged in 2014, and the HeArt district around it emphasizes medical and arts-related uses near Art Center College of Design. Commercial Roofers Pasadena repairs and replaces commercial roofs in Pasadena, CA, and around a healthcare campus we begin with the joints, the air intakes and the schedule, because the roof has to be fixed without disturbing the care beneath it.
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Commercial Roofing in the HeArt District, Pasadena, CA
Where New Wings Meet Older Ones
Buildings added at different times do not move together. Each expands in the heat, settles on its own footings and carries its own roof, so the line between them gets stretched in both directions every day. A sound joint is a detail with slack in it: a flexible cover or an expansion joint formed in sheet metal or membrane, set high enough that water cannot ride across it. A poor one is a bead of sealant over a rigid plate, and it opens in the first hot summer.
Buildings added at different times also tend to carry roofs of different ages, so we study each stage on its own: which membrane, which insulation, which drains and how each ties into its neighbor. That map shows which roofs need repairs and which have reached replacement, and it is the starting point for roof capital planning that a facilities director can take to a budget meeting.
Working Beside a Surgery Center
Next to the hospital, in the Huntington Pavilion, is the Huntington Ambulatory Surgery Center. Roof work near a surgical space is governed by air and dust. Intakes get protected or shut down during the work, tear-off dust is contained, and debris routes stay away from entrances and exits. Fumes from hot-applied materials are a particular worry, so adhesive-based and mechanically attached systems are chosen over torches and kettles wherever infection control demands it.
Healthcare owners usually run a formal risk assessment before construction work, and the roofer's plan has to fit inside it: where the crew enters, how material is hoisted, which air handlers are affected and who is called when something changes. We write that plan with the facilities team and revise it as conditions move. A hospital roofing plan that cannot be explained to an infection preventionist is not ready for the roof.
Roofs Over a Trauma Center
Huntington Hospital serves as the only Level II trauma center in the San Gabriel Valley, which means its emergency department cannot close for a leak. A failed seam over a care area is an operations problem first and a roofing problem second. We respond at any hour with a temporary dry-in, such as a sealed membrane patch over the opening, then schedule the permanent repair for a time facilities can accept. For an owner, the emergency roof repair response matters less than the plan behind it: a map of drains, roof access and shutoffs on file before the call comes.
The temporary fix is only the first step. Once the area is dry, we trace the source, test it and build the permanent repair on a schedule hospital engineering can plan around. A record of what happened and what was done goes to the facilities office the same week, so the next storm finds a documented roof.
Clinics, Studios and Skylights
The HeArt district mixes medical and arts-related uses, and the roof work follows the uses. Medical offices and clinics bring rooftop units and exhaust. Arts buildings can bring skylights and clerestories that let daylight into studios, each an opening in the roof with its own curb and glazing seal. A skylight leak is more often a flashing problem at the curb than a defect in the glass, and a skylight in direct sun cycles harder than a wall does. Where such openings exist, we rebuild the curb flashing and check the glazing gasket in the same visit. Owners in healthcare systems with several clinic roofs can put them on one maintenance plan, so each building is looked at on a set rhythm.
Summer Heat on Rooftop Plant
Pasadena has recorded a June high of 113 F, and an October 2023 heat advisory put highs near 100 F. A hospital's rooftop plant works hardest in exactly those spells, and the roof beneath it works hardest too. Dark membrane around chillers and air handlers radiates heat into equipment that is already straining, while pipe supports and walkway pads sit on a surface that softens in the afternoon. A reflective membrane or coating lowers the surface temperature, and California's energy code sets a reflectance floor for low-slope roofs that are new or heavily altered. Our cool roof installation planning works out which route a given project has to follow before the permit is filed.
Records a Facilities Director Can Use
A hospital campus carries many roofs of different ages, and the person responsible for them needs to know which one to worry about next. A written roof condition report with dated photographs, drain locations and moisture readings turns that worry into a ranked list. The same habit serves other institutions in the city, from the 1920s and 1930s buildings of the Pasadena Civic Center to research properties in Lamanda Park, where the adopted plan supports research-and-development uses: write down the roof conditions before deciding what to do about them.
Noise, dust, and air movement need a written plan before roofing starts near care spaces. We coordinate the affected intakes and access routes with facilities staff, then keep removed material contained and the roof opening covered as each work zone closes. The plan also names who can approve a change if the deck or flashing is worse than expected. That keeps a necessary repair from creating avoidable disruption inside.
Commercial Roofing Questions
Why do the roofs between two hospital wings leak more than the rest?
The two buildings move separately, and the joint between them takes all of that movement. A rigid cover or a sealant bead cannot absorb it for long, while an expansion joint with slack in it can. Rebuilding the joint, not resealing it, is what keeps it closed.
How is roof work kept away from surgical and care areas?
Intakes are covered or shut down for set hours, dust is contained, and debris and material routes avoid entrances. Adhesive-based and mechanically attached systems replace torches where infection control calls for it, and the plan is written with the facilities team before any crew arrives.
What happens when a leak appears over an emergency department?
A crew goes to the roof and makes it watertight with a temporary dry-in while the area below stays in service. The source is traced and tested after that, and the permanent repair is scheduled for a window that hospital engineering approves.
Is a skylight leak a glass problem or a roof problem?
It is more often the curb flashing, where water slips past the metal or the sealant at the base. We check the curb, the flashing and the gasket together, because fixing only one leaves the others to fail on the next cycle of heat.
Does a medical campus need a roof plan, or only repairs as leaks appear?
A plan, because leaks at a hospital are costly in ways that have nothing to do with roofing. A dated condition report ranks the roofs by risk, so repairs and replacements can be scheduled on the owner's terms and not on the weather's.
Let us look at your campus roofs in detail
On a healthcare campus the joints, intakes and drains decide whether a roof can be trusted. Call with the address and we will walk each one with your facilities team and write down what we find.