Gloeocapsa Magma (algae) is common on roofs and often leaves signature black streaks all over your shingles. This substance thrives in humidity and hot temperatures and spreads out, having a destructive effect on your roof. It feeds off the moisture that certain types of shingles hold on to. While the roof is affected, it begins to lose its ability to reflect UV rays and eventually rots the shingles. This has been said to affect roofs severely and can take up to 10 years off the life of a roof. Soft washing is the only way to effectively remove this algae without damaging the shingles and voiding any warranty. The Asphalt Roofing Manufacturers Association recommends low-pressure bleach or detergent assisted washing as the preferred method for cleaning asphalt roofs in order to prevent damage to the shingles.
Pressure washing a roof, even at low pressure, can and will void your warranty and cause granular loss. This means that the integrity of the roof tiles will be compromised due to damage from the intense pressure of the water. In addition, power-washing only scrubs the surface of the roof without removing the root systems that have grown in, around, and under the tiles.
The Soft Wash technique eliminates all plant, fungal, and bacterial life and any dirt and grime from the roof safely, returning it to its original color with no risk of damage to the roofing materials.