## How to Pressure Wash a Garage Floor: A Complete Step-by-Step Guide

Your garage floor takes a beating—oil drips, dust, tire marks, and grime. A **pressure washer** is the fastest way to restore it. This guide walks you through the entire process safely and effectively.

### Why Pressure Wash Your Garage Floor?

Concrete is porous. Spills sink in, and sweeping only scratches the surface. Pressure washing blasts away embedded dirt, mildew, and stains. For a deeper look at whether your specific floor can handle it, see this guide on whether you can pressure wash garage floor surfaces safely. Done right, it also prepares the concrete for sealant or paint.

### **Step 1: Prep the Space**

Clear everything out—cars, tools, shelving. Sweep loose debris first; a pressure washer alone can’t push piles of leaves. Cover nearby outlets and check for cracks you may need to patch afterward.

### **Step 2: Choose the Right Pressure and Nozzle**

**Concrete PSI** matters. Stay between 2,500 and 3,000 PSI. Use a **25-degree nozzle** for general cleaning and a **turbo nozzle** for stubborn stains. Never use a 0-degree tip on concrete—it etches the surface.

### **Step 3: Apply Degreaser**

**Oil stains** need pretreatment. Spray a concrete degreaser, let it sit 5–10 minutes, then scrub with a stiff brush. This step separates a good job from a great one.

### **Step 4: Wash in Sections**

Work in 4×4-foot grids. Hold the wand at a 45-degree angle, about 12 inches from the floor. Overlap each pass. Start at the back and push dirty water toward the garage door.

### **Step 5: Rinse and Repeat**

Rinse the entire floor with clean water. For heavy **grease buildup**, repeat the degreaser step. Squeegee excess water out the door.

### **Step 6: Let It Dry and Seal**

**Drying time** takes 24–48 hours. Once dry, apply a **concrete sealer** to lock out future stains and make cleaning easier.

### **Common Mistakes to Avoid**

– Using too much pressure and etching the concrete
– Skipping the degreaser on oil spots
– Washing on a windy day (overspray hits walls)
– Leaving standing water, which causes mildew

### **Frequently Asked Questions**

**Can I pressure wash a painted garage floor?**
Only lightly. High pressure strips paint. Use low PSI and a wide nozzle.

**How often should I do this?**
Twice a year—spring and fall—keeps your floor in top shape.

**What about epoxy coatings?**
Check the manufacturer’s rating. Most handle gentle pressure washing.

### **Final Thoughts**

A clean garage floor transforms your space and protects the concrete. With the right nozzle, pressure, and degreaser, you’ll get professional results at home. Grab your pressure washer, set aside a weekend afternoon, and see the difference for yourself.