Sudden expansion and contraction resulting from thermal shock produces incredible stress on roofing - inevitably shortening its life and causing leaks. Winds drive beneath unsealed areas, lifting and loosening material as well as shaking the structure, moving and twisting the roof. Atmospheric pollutants produce highly acidic compounds which weaken cement, bitumastic materials and metal flashings. Heavy loads of snow stress the roof, pushing typical roofing materials beyond their breaking point. Plant spores and seeds take their toll on your roof.
Roots attack structures physically and chemically and, over time, can be as damaging as any storm.