After it rains we notice these small black granules all over my back patio. I have a 13 year old roof with some black algae on it. Do you think this is the dead algae or my shingles flaking off?
u/Distinct_Sell_6461 — 7 days ago
u/Distinct_Sell_6461
After it rains we notice these small black granules all over my back patio. I have a 13 year old roof with some black algae on it. Do you think this is the dead algae or my shingles flaking off?