How to Paint Your Garage: Walls and Concrete Floors

G Garage spaces are often the most neglected rooms in the house, serving as dumping grounds for oil spills, dust, and spiderwebs. Painting both the walls and the concrete floor creates a clean, bright, and wipeable surface that makes the area feel like an extension of your living space rather than a glorified storage unit. Achieving a professional finish requires patience, particularly when dealing with concrete. If you rush the prep work, your floor paint will peel within a season. Doing this well means creating a chemically bonded surface for the floor and a smooth, sealed substrate for the walls so that your garage stays protected and pristine for years.

1. Strip Every Oil Stain. Empty the entire garage and sweep the floor thoroughly. Use a heavy-duty degreaser and a stiff-bristle scrub brush to remove all oil stains, grease, and surface dirt, then rinse thoroughly with a hose.
2. Open Concrete Pores. Mix an acidic concrete etcher with water according to the manufacturer's ratio and scrub it into the floor. This opens the pores of the concrete so the epoxy can lock into the material.
3. Seal Every Crack. Rinse the floor until the water runs clear and let it dry completely—ideally for 24 hours. Fill any cracks or divots in the concrete with a concrete filler, smoothing it flush with the surface.
4. Prime Before You Paint. Wipe down the walls with a damp cloth to remove loose dust. Apply a high-quality masonry primer to raw block or drywall to ensure an even finish for your topcoat.
5. Two Coats, Zero Scuffs. Apply two coats of exterior-grade semi-gloss paint. The semi-gloss finish is vital here because it resists moisture and is much easier to wipe down when it inevitably gets scuffed.
6. Lock Epoxy to Concrete. Mix your epoxy kit components exactly as directed. Use a roller to apply the epoxy to the floor in manageable sections, back-rolling to ensure uniform coverage.