A: Getting your roof cleaned is one of the most important things you can do when it come to preventative exterior maintenance.

Have you ever noticed those ugly black streaks on your roof? That is an algae called Gleocapsa magma. This is an airborne pathogen that is carried by the wind. Amazingly enough, it actually feeds on the limestone in your shingles (the limestone in your shingles is used to help add weight and help prevent you from losing shingles during a heavy wind or storm). The longer this algae stays on your roof the faster your roof will deteriorate, taking years off of its life. These black streaks can also raise energy costs as they soak in the suns rays, causing your home to be more difficult to cool down.

You may also notice green moss growing on your roof, leaves and pine needles untouched, and trees branches overgrown, allowing moisture to constantly dwell on your roof. All of these will also aid in premature roof failure and are very important to be maintained.

A: As with house cleaning, the amount of time between roof cleanings will largely depend on the amount of moisture and shade your roof receives. A typical roof cleaning should last 3-5 years, helping to extend the life of your roof, saving you thousands down the road.

A: Roof cleaning with be done using the same mixture as used on your home. The only difference being that the mix used on your roof will be much stronger, helping to fully vanquish all of those ugly and harmful roof stains.  Soft washing with bleach is the recommended way to clean roofing by the Asphalt Roofing Manufactures Association.  

One story homes will usually be cleaned by physically getting up on the roof and using all low pressure cleaning methods. While second story roofing will be cleaned from a ladder.