Reasons to avoid bleach for many years bleach was the go to cleaner for mold and many commercial mold cleaning products still include it as the main ingredient.
Best way to clean black mold from concrete.
I needed to learn how to clean mold or mildew from concrete and stone.
Follow our detailed 4 steps removal guide below for the best result and lasting effect.
VoilĂ all mold removed.
If you do not have a pressure washer you can purchase one relatively inexpensively to have on hand for this and future projects.
There are good reasons to avoid bleach though.
How to clean mold from concrete the best solution is to scrub and clean the affected areas with a mold killing detergent or a simple solution of household bleach and water.
Then i learned about another method from a facebook group i am part of diy home improvement projects wet and forget wet and forget moss mold mildew and algae stain remover.
Also known as strachybotrys atra black mold can grow on just about anything including concrete.
Once the solution has had a chance to soak into the mold and mildew power up your pressure washer.
I watched a few of my neighbors use a solution of diluted bleach which is effective.
Step 1 scrub and loosen the black algae on the affected concrete using the push broom with short strokes and heavy pressure.
Spot test a small area with your chosen cleaning agent to make sure no damage occurs.
The idea is to break the black algae s outer shell to make it more susceptible to bleach penetration.
Let the detergent or bleach solution soak in for a while to ensure that all the mold is killed.
Never mix bleach with ammonia.
Even though this solution is mild make certain to wear safety goggles rubber gloves and have plenty of ventilation.
Keep the concrete dry to prevent black mold from forming in the first place.
Rinse exterior concrete afterwards with a power washer.
Dry inside walls with a towel or rag let a cool breeze dry outside walls.
Combining the two creates a lethal gas.
Choose from several cleaning agents to remove mold from concrete.
The best way to kill black mold is to attack in in its early stages with a mixture of water and chlorine beach.
The best way to remove mold from concrete walls is to clean and scrub the surface with mold killing detergent rinse the walls with clean water.
You ll need to wear protective gear and scrub the moldy areas vigorously.
Be sure to scrub aggressively to get down into the pores of the concrete.
Add the bleach to the water first then the detergent.
The mold should break up and wash away very quickly leaving your concrete looking cleaner than the day it was poured.