To test whether a stain is grime or mildew try washing the stain away with water and a detergent like spic and span.
Detergent to clean painted cement siding mildew.
If you don t have access to a high pressure steam cleaner you can use a bucket of hot water and some mild laundry detergent to clean your hardboard siding.
Create a gentle cleansing solution made of mild dishwashing soap and water.
If you are dealing with mold and mildew buildup you can choose a mild cleanser like jomax mildew check or mold armor.
Make sure to dilute any concentrated soaps like dish soap.
A little goes a long way.
Wet a soft cloth with the cleaning solution and wipe the greasy stains.
Clean the stained siding while rinsing your cloth frequently.
Remember you still want to be careful so as not to damage the fiber cement siding.
All you need once again is a soft cloth and your garden hose.
Start from the top and clean with the direction of the siding.
Also known as sodium borate borax is a naturally occurring mineral compound that will clean many of the same surfaces tsp has been used on for years including mold and mildew stained areas all.
Fill the bucket with hot water and add about 1 3 cup of mild laundry detergent.
Now you can clean away the dirt and lightly scrub the siding.
If the stain doesn t wash away with water and detergent it s probably mildew.
We ll be using a simple solution of a mild liquid dishwashing soap like dawn ivory or joy.
It appears to make mildew vanish but on porous surfaces such as wood or vinyl siding chlorine evaporates too quickly to get to the fungi s roots guaranteeing regrowth.
Customers sing the praises of this mold and mildew stain remover from rmr 86.
Get your cloth wet with the soapy water and clean the siding.
Just like you should never use an abrasive brush never use any harsh chemicals to clean your siding.
Because mildew is a fungus growth it thrives on moisture and dirt so keep the siding open to the sun and air.
Courtesy of rust oleum when mildew gains a foothold homeowners often turn to diluted chlorine bleach sodium hypochlorite a k a.
It works on nearly any surface including wood fiberglass concrete and tile and it promises to remove unsightly stains in 15 seconds without the need for any scrubbing except in the case of the toughest stains.
Do not allow soap or cleaners to dry on the siding.
To clean your siding wet your soft cloth with soapy water.
Rinse the siding with a low pressure garden hose.
Apply to the siding and use your water hose to rinse the area.
Mix the solution until bubbles form and use the floor brush with a long handle to scrub the hardboard siding.
Never use an abrasive cleanser when cleaning fiber cement siding.
Your standard household whitener.