Answers. Quickly and now. Here are the “I don’t have time to read” answers to your rooftop grease containment questions. Simple enough.


What do I do about grease on my roof?

ANSWER: Clean it up, inspect the roof, and get a rooftop grease containment system. Give us a call. 1-800-913-7034


How did grease get on my roof?

ANSWER: Through the upward suction of the exhaust fan above your cooking equipment. Grease builds up in the ductwork and then leaks out onto the roof.


Why should I care about grease on my roof?

ANSWER: Fire hazards, slip and fall accidents, damage to the environment, and eventual roof damage.


I was told my roof was “fat resistant”, is that true?

ANSWER: Yes. Materials like PVC-KEE (PVC with coatings) are much more resistant to grease than something like EPDM, but baked on grease can still cause flexing issues, ripples, and eventual tears in the membrane. Plus, roof damage is only part of the problem. See the question above.


How much does grease containment cost?

ANSWER: Approximately $750-$1000 per fan including installation. Then another $500-$750 per year for maintenance. So 2 locations with 2 fans each would be approximately $1500 for equipment and $750 for maintenance. Maintenance renews yearly. Services are usually quarterly. Prices obviously vary by size, type, grease production, etc.


How often should I perform maintenance on my grease containment system?

ANSWER: Depends on the system and grease production volumes, but start with quarterly for the first year. If you have to adjust, then do so. Move to bi-monthly or bi-annually as needed.


What is included in rooftop grease containment maintenance?

ANSWER: Emptying out the unit (or taking out the filters), cleaning up any grease that may exist around the unit, and replacing the filters inside the unit. This should include pictures and more complete scope of work.


How much grease am I producing and how much gets to the roof?

ANSWER: Depends on the meat, but you can estimate 10% to 30% of the weight of the meat ends up dripping or vaporized into the air. Of that, about 10% ends up in the exhaust system, and eventually the roof. Estimated Example: If you cook 1000 lbs, 100lbs of grease is produced minimally, and 10lbs ends up in your exhaust system.


Who should install my containment system?

ANSWER: Look to the manufacturer first. If they cannot do it, find a contractor that has done it before. The manufacturer should be able to point you in the right direction.


Can contractors buy containment systems?

ANSWER: Of course. There is no company currently that prohibits contractors from buying rooftop grease containment systems.


Can I buy containment systems/filters and install them myself?

ANSWER: Yes! If you are confident enough to perform the cleanup, inspection, and installation yourself.


What features should I look for in a good containment system?

ANSWER: Absorption capabilities, water resistance, fire resistance, weather resistance, and it should not interfere with exhaust system operation.


Can I include grease containment in my new building specs?

ANSWER: Yes! As long as the company has the drawings you need or you don’t mind drawing them in yourself. You can download ours here:


Should I blame my exhaust cleaner for the grease on my roof?

ANSWER: If there is splatter everywhere, yes. If they didn’t recommend a containment system, yes. If the grease is present, but not splattered, no. If you don’t perform cleanings according to code and NFPA recommendation, no.