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How to Paint a Mold-Resistant Bathroom

Ask This Old House painter Mauro Henrique paints a bathroom using a mold-resistant paint, in this edition of DIY Smarts.

Steps for Painting a Mold-Resistant Bathroom:

  1. Use painters tape to protect any tile that’s against the surface being painted.
  2. Lightly sand the walls with 220 grit sandpaper. Wear a mask while sanding.
  3. Suck up the dust from sanding with a vacuum and then wipe the walls down lightly with a damp rag to remove the remaining dust.
  4. Pour the antimicrobial paint into a bucket.
  5. Use a paintbrush to cut around the edges of the wall with the new paint.
  6. Paint the rest of the wall using the roller and the roller tray filled with paint.
  7. Allow the first coat to dry and then apply a second coat.


To prevent mildew from forming on bathroom walls, Mauro says that it’s important to keep the shower vent clean and use it for at least 30 minutes after a shower. If mildew appears, take a bucket of water with a small amount of bleach in it, dip a rag into the bucket, and gently clean the walls to avoid damaging the paint.

Mauro painted the walls with Behr Marquee interior paint in Gray Shimmer with an eggshell finish. The paint is mildew resistant. Mauro applied two coats to ensure even coverage.

The other materials Mauro used for this job, including the paintbrushes, tape, trays, and drop cloths, can all be found at home centers.

Expert assistance with this segment was provided by Mauro’s Painting.

Shop Interior Paint at The Home Depot

Shopping List

Antimicrobial paint
Painters tape
220 grit sandpaper
Roller tray

(All products above via The Home Depot)