Fungicides are chemical substances which are used to kill growths of fungi. Great quantities of fungicides are sold each year. These chemicals are sprayed or dusted onto the fungal growth to kill fungal diseases. Molds are a member of the fungi family. Molds do not contain chlorophyll and, therefore, cannot produce their own food.
Molds can live off of a tremendous variety of food sources as well as reproduce in large quantities.
Mildew is the name for certain organisms and the plant diseases they cause, and the discoloration and disintegration of materials caused by fungi. Proper roof coating is very essential.