Black mold and fungus growing on a roof should not be ignored. Fungus releases spores and other allergens that impact indoor air quality. People living or working in environments with mold or fungus present can suffer from hay fever-like symptoms or other more serious health problems. This means that your family can be at risk. This also holds for commercial buildings and puts both your employees and customers at a risk, something you do not want. Roofs containing mold and/or fungus are more likely to eventually have their indoor air quality contaminated with mold spores which can be a dangerous and expensive problem. As the fungus grows on the outside of the roof, it eats away the base of the shingle and expands and contracts with the outside air temperature.
Not only can black mold and fungus on your roofing be dangerous to live around, but this growth and movement loosens the granules, dramatically shortening the life of your roof. Moss growing on a roof causes the shingle tabs to raise allowing water, ice, and rain underneath. The wind will blow off the tab causing expensive exterior roof repairs. Water under the shingle tab will enter the house and cause interior ceiling damage resulting in expensive interior repairs. It can also back up and cause ice damming in the winter, something we need to start worrying about here in Westchester NY as the winter quickly approaches.
Professional power washing and cleaning with commercial grade cleaning agents that safely loosen and remove the organisms causing the roof stains is safe and effective on wood, slate, concrete, vinyl siding, and virtually any hard surface. We use environmentally friendly products and proceses that will not damage nearby vegetation and will not contaminate the environment.
An annual power washing for your roofing is a great idea, but you can also do semi-annual roofing inspections so that you can catch black mold or fungus. If you follow safety guidelines you can walk your roofing once a year yourself if you know what to look for, however, at least once a year have a professional roofing inspector take a look because chances are they can spot smaller problems that you may not be able to see.