Commercial Rooftop Grease Containment

Exhaust fans discharge grease-laden air onto your roof. Without containment, that grease pools around the fan base, saturates the roof membrane, and causes permanent damage — staining, softening, and leaks. Grease damage is typically excluded from roof warranties and can void your coverage entirely. Containment catches the grease at the source before it reaches the membrane, protecting your roof investment and keeping your property compliant.

Replacement frequency depends on your cooking volume and grease output. High-volume operations (charbroiling, wok, 24-hour kitchens) may need replacement quarterly or even monthly. Moderate-volume restaurants typically replace media semi-annually. We check containment condition on every scheduled exhaust cleaning visit and replace media before it becomes saturated. We recommend coordinating replacement with your NFPA 96 cleaning schedule.

Most commercial leases require tenants to prevent grease damage to the roof. We install containment systems (pads, pillows, or corrals depending on your fan type and roof layout) that catch grease discharge at the fan base. We provide photo-documented installation reports and ongoing replacement records that satisfy landlord requirements and demonstrate you are maintaining the system. If your lease specifies a particular system, we can match it.

NFPA 96 requires that grease discharge from exhaust systems be managed and not allowed to create a hazard. Uncontained grease on a rooftop is a slip hazard, a fire risk (grease-saturated roofing materials), and an environmental concern. While NFPA 96 does not prescribe a specific containment product, fire marshals and inspectors routinely expect to see containment in place as part of a compliant exhaust system. Having it installed demonstrates responsible maintenance.

Cleaning Pros Plus provides rooftop grease containment services across the Central Valley, the Bay Area and Northern California, including Alameda, Contra Costa, Fresno, Kern, Kings, Madera, Mariposa, Merced, Sacramento, San Joaquin, Santa Clara, Stanislaus and Tulare counties. If you are outside this area, contact us and we will tell you whether we cover it.