The short version
- Spring brings severe storms, hail and straight-line winds
- Hot summers bake roofs and attics
- Humidity and shade encourage algae and moss
- Winter freeze-thaw and occasional ice add stress
Storm season
Spring is the peak of severe weather in Middle Tennessee, with thunderstorms that can bring hail, high winds and heavy rain, and tornado threats. Storms can also occur at other times of year. Roofs take direct hits from hail and wind.
Inspect after severe weather even if you see no damage.
Heat and sun
Long, hot summers heat roof surfaces and attics. Heat ages shingles, dries sealants and puts stress on poorly ventilated roofs. South- and west-facing slopes often age first.
Ventilation and light colors help.
Humidity and shade
Warm, humid air and shade encourage algae streaks and moss, which hold moisture against the roofing. Trees add debris to valleys and gutters.
Regular cleaning of debris and trimming limbs help.
Cold snaps
Freeze-thaw cycles and occasional ice can stress flashings and sealants. Condensation can form in attics during cold spells.
A fall checkup prepares the roof for winter.
General information, not engineering, legal, insurance or safety advice. Roofs, policies and local requirements vary, and every roof should be judged on its own condition.
