There are a variety of ways to clean concrete steps.
How to clean the concrete wall around basement exterior steps.
For mild cleaning spot cleaning and or indoor cleaning use a mild dish soap and a stiff bristle brush to remove stains from your concrete steps.
Mold and mildew spores flourish in basements that are dim warm damp and poorly lit.
Unless you take every step to keep the soil.
For outdoors try a high quality acrylic sealer made for exterior use.
If you plan to paint concrete walls use a waterproof sealant first then apply stain blocking primer and paint.
To clean concrete surfaces safely and effectively begin with the least toxic cleanser and up the ante as needed.
Therefore the first step to correct any type of basement wall stain problem is to provide adequate foundation drainage in order to minimize the water infiltration.
Seal any cracks in the concrete walkway around your home with concrete caulking or tar.
For stubborn stains and outdoor jobs use a concrete cleaner with a push broom or a pressure washer to clean your concrete steps thoroughly.
After scrubbing the walls as directed earlier scrub them again this time with a stiff scrub brush and the bleach solution.
When groundwater consistently infiltrates the porous concrete walls through capillary action wall stains and related problems can occur.
Since many basements contain high moisture levels they are often installed with cement cinder block walls.