Issues concerning rooftop contaminants are being examined closely these days by some state and federal agencies, roofing manufacturers, and building owners because of ongoing problems and hazards certain contaminants can create.


These contaminants include Fats, Oil and Grease (FOG) from rooftop exhaust hoods.

FOG causes roofing membrane to soften, delaminate, crack, and/or blister, causing:

  • Roof leaks and other damages to your building
  • Nullification of any valid manufacturers roof warranty
  • Slip and fall hazards to rooftop maintenance workers such as HVAC, Refrigeration, etc.
  • Fire hazards
  • Health-code violations
  • Water Runoff Pollution into stormwater drains, lakes, streams, ponds, etc.
  • Pest and Rodent infestations
  • Fines from local or federal government agencies

As a building owner, it’s important to be aware of the serious problems fats, oil and grease have on your roof and on the environment. Fats, oil, and grease are discharged directly to sewer systems, lakes and streams without treatment before being readmitted back into the environment. At Lentz Roofing, we provide the highest quality grease containment systems and guarantee to protect your roof surface from contaminants.

Is your roof experiencing FOG issues?

Are fats, oils, or grease damaging your roof? It’s important to get a professional to assess it right away. Contact us today for a free inspection!

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