Our Roof Cleaner is very lightly sprayed on and within minutes dissolves all ugly black roof mold, leaving your roof like new clean and free of mold. We have been in business since 1983. We have always maintained a very high standard and are committed to our customers by holding all required state and local licensing & Insurance. The No-Pressure soap is great for Fascia & Soffit cleaning. Like the roof, the soap is very lightly sprayed on and ( instantly ) dissolves all black and green mold & debri.