Over time, your home's roof can become discolored and covered in moss and algae growth due to extended weather exposure. This can ruin the aesthetic of your roof and the rest of your home as a whole. Thankfully, cleaning off an asphalt roof is a fairly simple process that doesn't require a lot of time or a significant investment--and one that can be completed by most homeowners with the right tools.
The Benefits of Roof Cleaning
Besides restoring the aesthetic of your home, roof cleaning can help extend the lifespan of your roof by removing algae and mold, which can eat away at the shingles of your roof and allow water to seep into your home.
What You'll Need
You'll need a cup of chlorine bleach, a cup of laundry detergent, a gallon of hot water, a bucket, a garden hose, a pump sprayer, a ladder, and a stiff bristled mop or broom. Avoid using a pressure washer to clean your roof, as this can damage or tear off the shingles, creating more problems than it solves. All of these items can be found at most hardware stores.
You may also want to buy covers for your plants, to help prevent them from being harmed by the chemicals used while cleaning.
Cleaning an Asphalt Roof
Attach an empty container to the end of your gutter downspouts to collect any runoff, and cover any plants or bushes around your home as needed. Mix the bleach, detergent, and water together in the bucket, and then pour the mixture into the pump sprayer. Climb up onto the roof with the sprayer (you may want to have a family member or friend spot you while you climb up to help prevent an accident).
Start spraying the roof section by section. Start at the bottom of the roof, working backwards so you always have somewhere dry to stand as you work to prevent the risk of slipping. Let the solution sit for a few minutes before you start scrubbing with the stiff bristled mop. Scrub vigorously, but not so hard that you might damage the shingles. If the cleaner has dried as you were working, simply spray on some more and continue scrubbing.
Once you've scrubbed the area clean, use the garden hose to spray down the roof. Examine the area, and scrub any stained or dirty area as needed with repeated applications of the cleaner until the roof is completely clean. For more information about roof cleaning, contact a contracting business, such as General Roofing.