How to Prep Walls Before Painting

Here's a truth most people learn the hard way: 80% of a good paint job is prep work. If you skip the prep, even expensive paint will look bad.

Step 1: Clear the Room

Move furniture to the center of the room and cover it with drop cloths. Take down curtains, switch plates, and outlet covers. Remove nails and picture hangers from the walls.

Step 2: Clean the Walls

Dust and grease make paint peel. Wipe down all walls with a damp cloth. In kitchens and bathrooms, use a mild cleaner to cut through grease and soap residue. Let everything dry completely.

Step 3: Fix the Damage

Look for:

• Nail holes (fill with spackle)
• Cracks (use joint compound)
• Peeling paint (scrape it off)
• Bumps or texture problems

Fill holes and cracks, let them dry, then sand smooth. This might take a few coats for bigger holes.

Step 4: Sand Rough Spots

You don't need to sand entire walls unless the old paint is glossy. Focus on:

• Spots where you made repairs
• Any rough or bumpy areas
• Glossy surfaces that need paint to stick

Wipe away dust after sanding.

Step 5: Tape and Protect

Put painter's tape along:

• Ceiling edges
• Window and door frames
• Baseboards

Lay drop cloths on the floor, especially near walls.

Step 6: Prime If Needed

You need primer if:

• The wall is new drywall
• You're covering a dark color with a light one
• There are stains (use stain-blocking primer)
• The surface is very porous

Good prep takes time, but it makes painting easier and the results last longer. Rushing this part always shows in the final result. For more tips, check out common painting mistakes to avoid.