Located in a quiet Bethel neighborhood with heavy tree coverage, this colonial home suffered from significant Gloeocapsa magma infestation and dense moss growth along its roof planes. Dark black streaks extended down from the ridge vents, and thick moss clusters had rooted firmly in the shingle keyways and moisture-trapping shadow lines. If left untreated, the expanding moss roots would lift the shingle tabs, breaking the thermal sealant strips and exposing the wood roof decking to rot during winter freeze-thaw cycles.
We applied the manufacturer-recommended Asphalt Roofing Manufacturers Association (ARMA) non-pressure cleaning protocol. Standard high-pressure washing must never be used on roof shingles because it violently dislodges protective mineral granules, voids warranty coverage, and accelerates shingle deterioration. Instead, our team deployed a dedicated low-pressure soft wash delivery system delivering specialized sanitizing detergents at under 60 PSI—equivalent to a gentle garden sprayer.
Ground team members placed protective collection bags at downspout exits to trap chemical runoff and constantly misted foundation flower beds throughout the application. Within minutes of contact, the dark algae was completely oxidized and the moss root systems were neutralized down to the microscopic cellular level. The natural shingle coloration was restored, thermal reflectivity was recovered to lower summer attic heat gain, and the homeowner avoided thousands of dollars in premature reroofing expenses.