Of course, a clean roof is more appealing. Blotchy, discolored roofs reduce the curb appeal of your house, making it harder and less profitable to sell. Roof cleaning, however, goes beyond aesthetics. It poses a significant structural risk.
Your roof is physically out in the weather all the time, but it needs care to keep functioning well over time. If you’re fortunate enough to have trees on your property, dirt, debris, and leaves all find their way onto the roof.
When leaves and other debris are exposed to moisture from rain, they deteriorate your roof by feeding mold, mildew, algae, and bacteria.
Particularly harmful to your roof is algae, which is also fairly prevalent. This blue-green invader actually thrives in low light and feeds off asphalt and limestone roofing. It easily spreads from rooftop to rooftop in neighborhoods because its spores are carried by the wind and animals. Additionally, algae not only damages your roof but also has an impact on the warmth of your house. As a result, your roof heats up and radiates heat into your house, turning into dark stains that absorb solar energy.
Moss poses a serious risk as well because it traps moisture and can cause shingles to lift or curl. Mold poses a health risk to your family, making it an even more concerning menace.
Algae, mold, and moss can all cause deterioration, which can lead to leaks that endanger all the possessions under your roof. Pests and wildlife are invited by rot. Because rotting roofs are simpler for animals to eat through, bugs, rodents, and other pests are attracted to them. In order to build their nests and hives, bees and birds also look to roofs that are home to a thriving biosphere.
Cleaning your roof has another, frequently ignored advantage: it preserves its warranty. Although some homeowners believe that because their roof is covered by a warranty, they are not required to clean it, most manufacturers actually list cleaning as regular maintenance that homeowners are required to perform. In short, not cleaning your roof is the recipe for needing expensive repairs or a roof replacement.