Should you have just part of the roof or the entire roof cleaned?

Saturday, February 16th, 2013

Many homeowners wish to have only one side of their dirty roof cleaned and washed. They believe that it is only the one side that is dirty having ugly stains and black streaks on it. The truth of the matter is that air born algae (mold) lands on the roof and feeds on the material in the asphalt shingles. The technical name for the algae is Gloeocapsa Magma. It grows mostly on the north and west facing roofs which receives the prevailing moisture and shade. Not only algae but moss and lichen are also most prevalent on the north facing roofs. Just like moss grows on the north side of trees.

When the air born algae lands on the roof, it is not attracted by the north facing surface of the roof such as metal particles are attracted to a magnet. No the hungry and destructive algae lands on all sides of the roof. You just don’t see it or the effects of it on all sides. The Gloeocapsa Magma is a microscopic organism which is not visible with the naked eye. It grows and multiplies on all sides of the roof. However since the north sides make the most ideal breading ground for the algae, it multiplies and spreads most rapidly across the roof’s north surface. The dense areas of the algae communities are evident by the black streaks and ugly stains. By the way, the black streaks and stains are actually a protective sheathing that the algae excrete.

If only one side of the roof is treated by killing the algae, moss and lichen and the black streaks and stains removed, the unseen algae living on the other side of the roof will quickly migrate to the restored side. And now the cycle starts all over again. This will end up costing the homeowner more money in the long run by having to prematurely restore the roof again. The cost of treating the entire roof is not much more than treating only half of the roof. The reason for this is simply because a significant portion of the cost is from preparing and blending the specifically formulated roof cleaning solution, the time to travel to and from the job site and the time to set up and clean up. It does not take that much additional time to treat the other side of the roof.

Another important reason to have the entire roof treated versus only the visibly infected side treated is that Advantage Roof Cleaning Co can give the homeowner the exclusive 5-year Advantage Warranty for free.

To recap, it is highly recommended to treat the entire roof. It costs only a little more than treating only half of the roof and will save the homeowner in the long run. Furthermore the homeowner can rest at ease knowing the entire roof will be warranted over the next five years. However if the homeowner insists to treat only half of the roof, Advantage Roof Cleaning will of course still do that. At least the treated area will still be covered under our exclusive 3-point Advantage guarantee.