www.epa.gov/iaq/moisture
yy Ballasted roof systems: Look for missing or
displaced ballast and insulation boards beneath
the roof membrane.
roof facing down the slope to avoid spraying water up
under the shingles.
Guidance 2: Repair as needed to meet or exceed
warranty requirements.
yy Adhered roof systems: Look for loose areas of
the membrane, displaced insulation boards
and tented insulation fasteners and plates. On
mechanically attached roof systems, look for cuts
in the membrane, displaced insulation boards
and tented roof fasteners and plates. Inspect for
loose flashing. Also inspect rooftop HVAC units
for loose or missing sheet metal components.
Develop a maintenance work plan to correct deficient
conditions in a timely manner.
Verification of Roof and Ceiling Assembly
Maintenance
• Incorporate the completed checklist and map into
the user's manual and logbook upon completion of
each inspection.
Special Considerations for Asphalt Shingle Roofs
Pay particular attention to the tops of the vertical
slots between tabs. This area is usually the last to dry.
Moss and lichen growth on asphalt roofs keeps the
roofing materials damp, so use a water hose and
nozzle to remove moss and lichen. Spray from the
• Keep and maintain records of all inspections,
including the checklist. Include photographs and
test reports so that changes in roof conditions can
be verified.
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