From time to time EIFS finishes may need to be cleaned to remove dirt, mildew, tar or algae that can make even the most architecturaly sound building look like crap. A good cleaning will bring back the curb appeal that EIFS is famous for and is fundamental when preparing for recoating or resurfacing.
In my twenty years of working with EIFS as an applicator, business owner and home owner I've found that the best way to clean EIFS is easy as pie and anyone can do it.
Tools Required & Materials Required:
• Soft-medium bristle brush
• Garden hose
• Trisodium phosphate detergent
• Household bleach
• Clean, warm water
• Clean empty buckets
1. Depending on the size of the area to be cleaned and how dirty the surface is the tools used for cleaning will vary, for example:
a.) hand cleaning with a soft-medium bristle brush for small areas less than 100sq'.
b.) a garden hose for areas larger than 100sq', and
c.) a low psi pressure washer for areas larger than 500sq'
2. EIFS Cleaning Solution:
a.) 1-2 cups trisodium phosphate (TSP) detergent
b.) 1 gallon of warm water
Add 1/2 to 1 quart of bleach to remove algae (green stains) or mildew (black stains). The bleach kills micro-organisms that create the algae or mildew on
3. Apply the cleaning solution to the wall surface by brush or spray and let it soak for 15-20 minutes. Lightly scrub the area with a soft medium bristle scrub brush. (If you need to use a pressure washer make sure the pressure is set at 200-500 psi, and keep the nozzle several feet from the wall.)
4. After the EIFS cleaning solution has soaked the surface, rinse thoroughly with clean water, allow to dry and presto. A clean wall.
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