Leakage in the attic after a rainstorm. Possible cause: Leaky or inadequate shingle underlayment or deteriorated flashing
Leakage in the attic after ice buildup. Possible cause: Inadequate shingle underlayment allows water from ice dams to leak into attic
Blistering and or peeling interior or exterior paint. Possible cause: Excessive temperature or high humidity due to poor attic ventilation
Stains, mold, or mildew on interior walls or ceiling. Possible cause: Inadequate or faulty shingle underlayment allowing leakage or inadequate ventilation
Exterior decay on roof sheathing or siding. Possible cause: Poor attic ventilation
Missing, cracked, or curled shingles. Possible cause: Shingles have reached the end of their useful life
Mossy, dark, and dirty areas of your roof. Possible cause: Environmental pollutants; vegetation, fungus or algae; loss of granules due to age of shingles
Excessive energy costs due to your roof. 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 conditioning 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.