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Leakage in
attic after wind-driven rain
Possible cause:
Leaky or inadequate shingle underlayment or deteriorated
flashing
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Leakage in attic after ice
build-up
Possible cause: Inadequate shingle
underlayment allows water from ice dams to leak into
attic
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Blistering and/or peeling of
interior and/or exterior paint
Possible cause: Excessive
temperature or high humidity due to poor attic
ventilation
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Stains on interior ceilings and walls or
mold and mildew growth
Possible cause:
Inadequate or faulty shingle underlayment allowing
leakage or inadequate ventilation
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Decay of roof shingles, sheathing, and/or
siding
Possible cause: Poor attic
ventilation
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Missing, cracked or curled shingles
Possible cause:
Shingles have reached the end of their useful
life
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Dark, "dirty-looking" areas on your
roof
Possible cause: Environmental
pollutants; vegetation, fungus or algae; loss of
granules due to age of shingles
Click
here for FAQs About What's Growing On Your Roof!
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Excessive energy
costs
Possible cause: Insufficient
attic ventilation causes heating/cooling system to run
excessively
In warm weather, inadequate
ventilation will trap hot air in the attic, causing air
c onditioning systems to work harder, or leaving your
home's interior hotter and less comfortable. Attic
Ventilation: In both hot and cold weather, insufficient
attic ventilation may cause moisture in the attic to
become trapped and condense on the rafters. This
condensed moisture can drip down onto the insulation and
reduce its effectiveness.
Excessive energy costs can
result.
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