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Leakage in attic after wind-driven rain |
| 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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Leakage in attic after ice build-up Possible cause: Inadequate shingle underlayment allows water from ice dams to leak into attic |
| 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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Decay of roof shingles, sheathing, and/or siding Possible cause: Poor attic ventilation |
| Decay of roof shingles, sheathing, and/or siding Possible cause: Poor attic ventilation |
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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 |
| Excessive energy costs Possible cause: Insufficient attic ventilation causes heating/cooling system to run excessively |
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