Parking Garage Pressure Washing | San Antonio Texas

How to Clean a Parking Garage

With people and vehicles coming in and out daily, a parking garage can get dirty pretty quickly. Here’s how to address the common issues found on the surface of a parking garage.

Dirt, Dust, Grime, and Debris

Sweep the parking garage to remove loose dirt and debris. Then, apply a heavy-duty detergent onto the surface and allow the solution to sit for 5-10 minutes. Once the unwanted substances have loosened up, use a pressure washer to rinse the surface. Keep pressure level to 2,500 to 3,000 PSI.


Hot pressurized water can quickly and effectively remove gum from parking garage surfaces. First, apply a degreaser or lubricant onto the surface and allow it to sit for a few minutes. Use a power washer with 3,000 PSI to rinse the surface. Maintain a water temperature of 165°F to really melt away all the gum accumulation.

Oil, Grease, and Brake Fluid

Oil spills and grease stains can significantly hamper the appearance of a parking garage. If left alone, they can also accelerate the deterioration of the surface. Apply a degreaser soap onto the parking garage surface and allow it to sit for 10-15 minutes. Rinse using a pressure washer with about 2,500 PSI. If stains persist, consider a power wash system with a water temperature of 165°F.

Rust Stains

Leaking metal components can leave rust stains on the parking garage. Apply an oxalic-based cleaning solution to the surface. Leave the solution for 5-10 minutes. Then, use a pressure washer with a rotating scrub brush to clean the surface. Keep the water pressure level to about 2,500 to 3,000 PSI.

Mold and Mildew

Apply a mold and mildew remover onto the parking garage surface. Allow the cleaning solution to sit for a few minutes, Then, use a scrub to loosen up all the mold and mildew. Rinse off the solution with a soft wash system.