Bathroom Mold

Common Causes and Warning Signs

Inspection Checklist

• Check caulk lines around tubs and showers
• Look for leaks under sinks and behind toilets

Safe Cleanup for Small Areas

For small areas (under 10 square feet), you can typically handle bathroom mold yourself. For larger areas or if you have health concerns, see our guide on DIY vs. professional remediation.

1. 1

   Protect yourself

   Wear gloves and eye protection. Use an N95 respirator if you are sensitive or the area is larger.

2. 2

   Clean non-porous surfaces

   Use detergent and water on tile, glass, and fixtures. Avoid bleach on porous materials.

Prevention Tips

The most effective strategy is controlling humidity and ensuring surfaces dry quickly.

• Run exhaust fan during and 30 minutes after showers
• Keep indoor humidity below 60% (ideally 30-50%)
• Fix plumbing leaks within 24-48 hours
• Reseal grout and caulk at first signs of deterioration
• Squeegee or wipe shower walls after use

For ongoing moisture issues, a dehumidifier may help, especially in bathrooms without exterior windows.

When to Call a Pro

Some situations require professional assessment. Use our DIY vs. Pro quiz if you are unsure.

• Mold returns within weeks of cleaning
• Growth behind walls, under flooring, or in hidden cavities
• Soft, crumbling, or water-damaged drywall

Official Resources