Things You'll Need
Plastic sheeting
Rocks
Bricks
Garden hose
Bucket
Soap
Bleach
Brush
Black mold on a sidewalk is not only ugly, it's hazardous. Black mold can be slippery if stepped on, and if you spend a lot of time outside it can become an irritant if inhaled regularly. Luckily, black mold is easy to remove from a sidewalk. A soap solution will remove the bulk of the mold. Follow with a mild bleach solution to kill any remaining spores and remove any staining.
Step 1
Cover any adjacent grass or other plants with plastic sheeting weighted down with rocks or bricks.
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Step 2
Hose the moldy areas of the sidewalk down with a hose to thoroughly moisten them. The moisture will prevent the black mold spores from becoming airborne and spreading.
Step 3
Mix a solution of 1 gallon of water and 4 tablespoons of liquid dish-washing detergent.
Step 4
Pour the solution onto the affected area of the concrete. Cover even mold-adjacent areas (at least 2 feet on each side of the visible mold) as they may harbor invisible spores. Apply enough of the solution to soak and saturate the concrete but not enough to create a spill-over that may soak into the nearby soil.
Step 5
Scrub the concrete thoroughly with a long-handle scrub brush.
Step 6
Rinse the sidewalk with a spray from the hose. Aim the hose away from any nearby soil and plant life so that the solution drains onto the street.
Step 7
Repeat Steps 4 through 6 if you find you have missed spots.
Step 8
Mix 1 gallon of water and 1 cup of bleach in a fresh bucket.
Step 9
Pour it over the washed area following the instructions in Step 4.
Step 10
Scrub the concrete thoroughly with a long-handle scrub brush.
Step 11
Rinse the sidewalk with a spray from the hose. Aim the hose away from any nearby soil and plant life so that the solution drains onto the street.
Tip
For added protection, wear a filter dust mask when cleaning black mold.
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