If you wash the house when the siding doesn t yet have mold or mildew growth you might be able to accomplish it using a garden spray attachment to your garden hose.
How to kill mold on cement siding.
For more porous surfaces like drywall just use a rag so you don t damage the surface with more abrasive cleaners.
For larger jobs use 1.
If using a brush brush the siding s surface dust or dirt then rinse the area with a garden hose.
Protect larger plants by covering them with plastic.
Clean that area before you move on to another one.
The next step in eradicating mold on siding is typically cleaning the siding with a bleach solution which is either sprayed or brushed onto the affected areas.
Oxygen bleach hydrogen peroxide.
Chlorine can also damage foliage and stain clothing.
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.
Try not to clean too big an area.
Regardless of the kind of dirt contaminant or mold that you are removing from your fiber cement siding here are some general tips to follow.
To speed up the job try a mold cleaner specially formulated.
Before applying any cleaner test the solution on an inconspicuous piece of the siding.
This can be done by either the homeowner or a professional contractor.
Make a solution with 30 vinegar and 70 water.
Thoroughly water any plants near the area where you will be working.
Scrub mold off hard surfaces such as window sills and tile with detergent and water and dry completely with a rag.
Pre wet the surface to be cleaned.
That way if you must.
Start at the top and work to the.
From there rinse the area with clean water.
If using a soft cloth wet the cloth then wipe the area in a side to side motion in the direction of the plank shingle or panel siding until clean.
Less volatile than chlorine it removes mildew on and below the surface as well as algae dirt and oxidized paint but won t harm plants or clothing.
Homeowners can then try applying a mildew blocker to keep the matter from returning.