How to Prepare and Paint Exterior Walls

Painting the outside of your home isn’t just about curb appeal—it protects your home from weather, moisture, and sun damage. With a bit of prep and the right products, you can give your home’s exterior a clean, refreshed look that lasts for years.

Here’s how to approach it like a pro.

What You’ll Need:

• Exterior paint (acrylic latex or masonry-specific)
• Primer (if needed)
• Pressure washer or scrub brush
• Caulking and sealant
• Scraper or wire brush
• Sandpaper (80–120 grit)
• Ladder and safety gear
• Painter’s tape and drop cloths
• Brushes, rollers, or sprayer

Step 1:

Clean the Surface

Use a pressure washer to remove dirt, mildew, and flaking paint. If you don’t have one, a hose and a stiff scrub brush with soap and water will do the job—just allow extra time.

Tip: Be gentle around windows, doors, and trim to avoid damaging these areas.

Let the surface dry completely—usually 24–48 hours depending upon conditions.

Step 2:

Scrape and Sand Loose Paint

After the surface is dry, use a paint scraper or wire brush to remove any loose or flaking paint. Sand rough edges so they feather smoothly into the surrounding area.

Step 3:

Repair and Caulk

Check for gaps around windows, doors, siding seams, or cracks in stucco. Use exterior-grade caulk to seal joints and keep moisture out. Patch larger holes or damaged wood with exterior filler and let it cure fully.

Step 4:

Prime Bare or Problem Areas

Priming helps new paint stick and improves coverage. You don’t always need to prime everything—but definitely spot-prime:

• Bare wood or stucco
• Areas you’ve patched or filled
• High-weather spots like fascia or sills

Use a primer designed for exterior use and compatible with your topcoat.

Step 5:

Choose the Right Paint

Use 100% acrylic latex exterior paint for most wood, vinyl, or aluminum siding.

Flat finishes hide imperfections, while satin or low-gloss options are easier to clean and more durable in high-traffic areas.

Step 6:

Paint with a Brush, Roller, or Sprayer

Start at the top and work your way down. Use a brush or angled sash brush for trim and detailed areas, and a roller or sprayer for siding.

Apply 2 coats for even coverage and longer wear. Follow label directions for drying time between coats.

Final Step: Check Your Work

Walk around your home and check for missed spots or thin areas. Touch up as needed and remove painter’s tape carefully and immediately once everything is dry.

Protect Your Home—and Make It Shine

Exterior painting takes effort, but the payoff is huge. Done right, it can last beyond10 years, protecting your home and keeping it looking sharp.

Not Sure Where to Start?

Autohome carries premium exterior paints, primers, caulking, and weather-tested tools to help you get the job done right. Bring in a photo or just tell us your siding type—we’ll walk you through the best products and techniques.