You ll need to wear protective gear and scrub the moldy areas vigorously.
How to clean mold off concrete basement walls.
Open the windows if you are inside.
Before you can begin the mold removal process you must give your concrete basement walls a thorough cleaning.
Spot test a small area with your chosen cleaning agent to make sure no damage occurs.
Disinfect the area with a mixture of bleach and water 1 2 cup of bleach per gallon of water.
Allow the bleach mix to remain on the walls at least 10 minutes.
A better way to clean mold on basement walls is to use a one to one solution of white vinegar and water.
Step 1 clean your basement walls.
You can deep clean your concrete by using trisodium phosphate which is a strong detergent that can degrease as it removes mold and dirt.
To kill mold on concrete basement walls or for an ideal diy mildew remover pour 3 hydrogen peroxide into a spray bottle.
The vinegar will not only penetrate the concrete better it will also act as a disinfectant.
Saturate the walls with the peroxide then let it sit for up to 30 minutes.
Take the right amount of bleach and mix it with water.
Choose from several cleaning agents to remove mold from concrete.
Then take a scrub brush to scrub the mold.
Rinse exterior concrete afterwards with a power washer.
If the mold is powdery you should also wear a mask to avoid inhaling spores.
Next pour the newly formed cleaning solution into an empty spray bottle and proceed to vigorously apply it to your mold laden basement walls.
Do not mix bleach with an ammonia based cleaner.
Mix 1 4 to 1 2 cup of tsp per gallon of warm water and wear rubber gloves and goggles while scrubbing with it.
Scrub the vinegar solution into the concrete using a scrub brush with stiff bristles.
Mixing them causes toxic fumes.
Wear rubber gloves while applying the bleach mixture with a scrub brush or mop.
Vinegar will kill 82 of mold species.
Clean non porous surfaces such as the cement basement walls themselves with a mixture of 10 percent bleach and 90 percent water.
After the molds are gone you must rinse the area with clean water.
Saturate the walls with the peroxide then let it sit for up to 30 minutes.