How to Improve Drainage on a Concrete Patio

Water on the patio can cause discoloration and erosion.

Heavy rainfall or sprinkler use can cause water to build up on a concrete patio. Excess water can cause concrete discoloration and pitting, and it may also damage nearby house structures. You can improve patio drainage by relocating water sources, applying a waterproofing sealer and installing drainage mats.

Things You'll Need

• Scrub brush
• Plastic sheeting
• Waterproofing sealer
• Garden sprayer
• Paint roller
• Drainage mats

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Instructions

1. Move sprinklers and plants located near the patio to prevent water from spraying or draining onto the concrete.

2. Clean the patio thoroughly with soap, water and a scrub brush to remove dirt and grime in preparation for sealing. Allow the patio to dry completely before you apply sealer.

3. Mask the ground and walls around the patio with plastic sheeting to protect them from the sealer.

4. Spray an even coat of sealer over the patio. The sealer will prevent the patio from absorbing water, which will encourage water to run off the sides.

5. Roll a paint roller over the sealer to distribute it evenly into the concrete.

6. Place drainage mats around the patio, or build up soil in slopes around the edges of the patio to force water to drain away from the house.

References

• Concrete Network.com: Poor Drainage Is Causing Sidewalk Discoloration
• North Dakota State University; Drainage Around the Home Can Prevent Wet Basements; June 2005