Preservation Curb Appeal Healthier Environment. Preservation-Damaging mold, algae and dirt are more costly than most people realize. It can slowly break down of the outer coating on your siding that protects your house from the elements. The root system will penetrate the protective barrier causing your siding to become brittle ultimately making it susceptible to water damage and outside forces (hail, balls, etc.). Properly maintained, vinyl siding can withstand the occasio