Moss left on roofs untreated can cause irreversible roof damage. The moss grows under the shingles and lift them up that allows moisture to pernitrate those shingles.
Moss also creates a very damp layer that may never dry out. This can cause the shingles to deteriorate and if water pernitrates to the roof structure, you could have additional structural damage.
Honest Window & Carpet Cleaning uses a specialized liquid moss treatment that works on steep or shallow roofs that is safe and effective. This treatment kills the moss and then mother nature finishes the job with wind and rain to remove the dead moss.
Sweeping shingle roofing shortens the life of the shingles by removing the granules. Trust the experience of Honest Window & Carpet Cleaning.