How to Clean a Moldy Concrete Patio

Concrete patios are a common feature of many American homes. Concrete is an inexpensive building material that lasts a long time with proper maintenance. Mold is a natural enemy of concrete, especially when it's damp and dark. Aside from its unsightly appearance, mold is dangerous to sensitive individuals. According to the EPA, mold exposure can cause skin irritation, headaches and breathing problems. Clean your patio as needed to kill mold and prevent any future growth.

Things You'll Need

• Push broom
• Bleach
• Dish soap
• White vinegar
• Garden hose

Instructions

1. Put on rubber gloves and a protective mask to prevent irritation from the mold or bleach.

2. Pour full-strength bleach or vinegar over the moldy areas while avoiding any plants. Allow it to sit for at least 15 minutes to kill the mold.

3. Mix a few drops of dish soap, 1 part bleach or vinegar and 4 parts hot water in a bucket.

4. Scrub the moldy areas with a push broom.

5. Rinse the patio thoroughly with a garden hose.

6. Dry the surface quickly with towels.

Tips & Warnings

• Clean the patio early on a sunny day for the quickest drying time.

• Use either bleach or vinegar to clean mold. Never mix the two together.

References

• We Home Inspect: Cleaning Up Mold
• EPA: Health Effects and Symptoms of Mold Exposure

Resources

• Vinegar Tips