Headquarters Roofs and the Equipment Added Over Time
An office roof tells the story of every tenant improvement made beneath it. A condenser is added for a new server room, a conduit run is cut through for an antenna, an exhaust duct follows a new break room, and each time someone drills through the membrane. By the time a corporate office roof is twenty years old, it may carry penetrations that no drawing shows.
On a first walk we map each opening, check whether the flashing around it matches the roof system, and note which ones have dried boots or loose clamps. For a corporate headquarters like Edison International's, the right response is an orderly plan: repair the worst details now, schedule the rest, and keep a photographed record. That is the sequence on any office building roof, and the record becomes the base for a longer roof asset management plan.
Roofs Under Food Exhaust and Steam
A food company's roof is attacked from two sides. Warm, humid air from the process rises through the building and pushes vapor up into the insulation, while grease and cooking oils drift from exhaust stacks onto the membrane. Standard membranes soften when oils sit on them, which is why material choice matters long before the first seam is welded.
Where a roof sits under that kind of exhaust, we look closely at PVC roofing and KEE blends, which are formulated to resist grease and animal fats, and we check whether the insulation below holds moisture. An owner with headquarters in one city and production in another, as Huy Fong Foods has in Rosemead and Irwindale, needs both roofs held to the same details, the same inspection rhythm and the same record, which is what a multi-site roof program sets up.
Pasadena Heat and Mountain Rain on a Flat Roof
These are Pasadena, CA figures, and they serve as a guide for flat roofs across the San Gabriel Valley. Pasadena has recorded 113 F in June, receives some 20.4 inches of rain in a year, and sees February as its wettest month and June as nearly dry. Because the San Gabriel Mountains add rainfall, Pasadena receives roughly 6 inches more a year than downtown Los Angeles, and those wet winter weeks load drains and low points on any flat roof within reach of that weather.
A two-day heat advisory in October 2023 pushed highs near 100 F, which shows how late the thermal cycling lasts. The 2025 energy code treats a cool roof as a two-number test, 0.63 aged reflectance and 0.75 emittance with an SRI of 75 as the alternative, and it applies the test to new roofs and to alterations that pass the smaller of half the roof or 2,000 square feet. We help owners meet that through cool roof installation and plan the tear-off or recover around the rainy months.
Surveys That Find Wet Insulation Before It Shows
Water in insulation seldom announces itself. A roof can look sound, pass a casual walk and still hold wet board under a membrane that has been leaking slowly at one seam for months. An infrared moisture survey, flown or walked at dusk when wet areas hold heat longer than dry ones, maps those zones so we know how much of the roof actually needs to come off.
We pair the scan with core samples and a hands-on seam check, because the image shows where to look and not what the cause is. An owner who orders an infrared moisture survey before a reroof often finds that a recover over dry areas is possible and that the wet sections are smaller than feared. The photographed map also gives an insurer or a buyer something concrete to read.
Commercial Roofing Questions
Why does water stand behind a rooftop unit when the drains are clear?
Because the curb sits across the slope and holds the water back. A cricket on the high side splits the flow so it runs around the curb. Where none exists, a small tapered saddle or a few feet of tapered insulation usually fixes the problem without touching the rest of the roof.
What should an owner with offices in one city and a plant in another ask a roofer to provide?
One detail standard and one inspection schedule for both. That means the same flashing specifications, the same photo record format and one point of contact who can see both roofs. It also helps to ask for each building's findings sorted by urgency, so a leak at the plant is not hidden behind routine work at the office.
Which membrane survives grease from kitchen or process exhaust?
PVC and KEE are the usual answers because both are formulated to resist oils and fats that attack other single-ply sheets. The choice also depends on the insulation, the exhaust position and the existing deck, so we check those before recommending a system.
Should drains and insulation slope be sized for Pasadena rainfall figures?
They are a sensible guide for the valley. The mountains add rain to the Pasadena record, so we size drains and tapered insulation for the heavier end of the range and leave a margin for debris. A building that sits farther from the foothills may not need as much, but extra capacity costs little compared with ponding.
How much does tapered insulation add to the cost of a reroof?
It varies with how much slope has to be built and how many drains or scuppers are involved. A roof that already drains well needs little, while a roof with long flat runs may need a lot more board and labor. We price the tapered layer as a separate line so the owner can see exactly what the slope costs.
