Ask Shell's Tip Of The Day - Cleaning Algae Off Stucco

July 10th 2018
Ask Shell

The warm moist air escaping from your open windows during the winter months causes condensation to form on the soffits hence the dark algae formation. Warm air exiting from the windows allows the high relative humidity in the air to move upwards coming in contact with the cold under eave soffits hence the condensing causing the black spore growth called algae.

To remove the staining, wash the area with my Shell Busey Home Cleaning Formula and rinse well.