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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 |
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Excessive energy costs
Possible cause: Insufficient attic ventilation causes
heating/cooling system to run excessively |
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