"Your roof is one of the most costly parts of your home’s exterior. Removing any signs of algae, moss and lichen will ascertain its intended life expectancy. Algae and other forms of accumulation often form on the roofs of Coachella Valley homes can reduce a roof’s life expectancy. The existence of dirt, soot, or biomass can impact the absorption of sunlight by a roof. Consequently, this will represent the amount of heat a building absorbs".