Why Georgia roofs get those ugly black streaks
The dark streaks running down asphalt shingles in Griffin, McDonough, and across Spalding County are Gloeocapsa magma — a cyanobacteria that thrives in humid Southern climates. It feeds on the limestone filler inside asphalt shingles, spreads on prevailing wind patterns, and slowly degrades the granules that reflect UV and protect your home. Left untreated it invites moss and lichen, which lift shingles and trap moisture. A professional roof soft wash removes the organic growth, restores curb appeal, and extends the usable life of your roof by years.




