How to Clean Black Mold Safely at Home

What You’ll Need

Safety goggles, disposable gloves, and an N95 respirator that fits properly. Avoid touching or breathing mold and cleaning debris.
Plastic sheeting and painter’s tape to cover nearby items and limit dust from spreading.
Detergent or dish soap, clean water, a bucket, and disposable cloths or a scrub brush.
Trash bags for used cloths and other disposable cleanup materials.
A fan or dehumidifier for drying, if it can be used without blowing air across the mold.

Do not start if you have asthma, severe allergies, chronic lung disease, or a weakened immune system; ask someone else to handle the cleanup or contact a professional. Keep children and pets away from the work area. If you use a chemical product, follow its label and wear the protection it specifies.

Step-by-Step

Decide whether it is a DIY job. This approach is for a small, contained patch on a hard, nonporous surface, such as tile or glass. If the affected area is larger than about 10 square feet, growth is inside walls or ceilings, the material is soft or crumbling, or water came from sewage or contaminated flooding, do not clean it yourself. Contact a qualified mold-remediation professional. Also get help if you suspect extensive hidden growth or cannot isolate the area.
Find and stop the moisture. Repair the leak, improve ventilation, or address condensation before cleaning. Mold returns if dampness remains. If you cannot identify or correct the cause, arrange an inspection rather than repeatedly scrubbing the spot.
Clear and isolate the area. Move nearby objects out if possible. Cover items that cannot be moved and the floor near the work area with plastic sheeting; tape the edges. Close doors to other rooms, and keep people and pets out. Do not use a fan that could spread spores or debris into the home.
Put on protective gear. Wear goggles, gloves, and a well-fitting N95 respirator. Avoid dry brushing, sanding, scraping, or vacuuming mold with an ordinary household vacuum; these actions can put particles into the air.
Wash the surface. Mix detergent with water according to its label. Wipe or gently scrub the visible growth, working carefully so the surface stays controlled rather than splashing. Rinse the cloth or brush as needed, and use clean water to remove detergent residue. Do not mix cleaning products. Never combine bleach with ammonia, vinegar, acids, or other cleaners, since dangerous gases can result.
Dry it completely. Wipe away remaining water with a clean cloth and allow the surface to dry fully. A dehumidifier can help; use a fan only after the mold has been removed and without directing air toward other rooms. Continue addressing dampness and condensation.
Bag cleanup materials. Put disposable cloths, gloves, and plastic sheeting into a trash bag and seal it. Clean reusable tools with detergent and water, then dry them. Remove protective gear carefully, and wash your hands.
Check for recurrence. Look for new spots, persistent musty odors, peeling paint, or continuing dampness over the following days and weeks. If growth returns, the moisture problem may remain or mold may be hidden behind the surface; investigate the cause or call a professional.

Common Mistakes

Cleaning without fixing the dampness: Scrubbing only removes visible growth. A leak, wet building material, or persistent condensation can make it return.
Assuming “black mold” identifies a species: Color alone cannot tell you what kind of mold is present or whether it is more dangerous. You generally do not need to identify the species before addressing a small patch safely.
Painting over mold: Paint or caulk does not remove growth or solve moisture. Clean and dry a suitable surface before refinishing; replace damaged material when needed.
Using bleach as the default: Bleach is not a substitute for removing mold and moisture, and it can damage some materials. Never mix it with other cleaners.
Trying to save porous material: Mold can penetrate drywall, ceiling tile, carpet, insulation, and other absorbent materials. These may need removal and replacement, especially if they are wet or deteriorated.
Dry-scrubbing or using a regular vacuum: This can spread particles. Keep the surface damp enough for controlled washing and avoid disturbing growth.

Tips

Use detergent and water on hard, nonporous surfaces; follow the cleaner’s label and avoid unnecessary chemical treatments.
Keep indoor humidity below 60% when practical, ideally between 30% and 50%. A humidity meter can help you monitor it.
Use bathroom and kitchen exhaust fans that vent outdoors, and dry wet areas promptly. Improve airflow where condensation forms.
Take a photo before cleaning if you need to document a leak or property issue. Do not delay stopping active water damage to document it.
Do not rely on mold test kits to decide whether visible growth needs attention. Finding and correcting moisture is usually the practical priority.

Troubleshooting

The stain remains after washing: The surface may be stained even after growth is removed. Do not keep applying stronger chemicals. If the material is damaged, soft, or porous, seek advice about repair or replacement.

The mold returns: Check for a continuing leak, condensation, poor ventilation, or dampness behind the surface. If the source is concealed or the patch keeps returning, ask a qualified professional to assess it.

You find a larger area while cleaning: Stop work, avoid disturbing it, keep others out, and contact a remediation professional. A small visible patch can sometimes be part of a wider problem.

You smell mold but cannot see it: Do not open walls or ceilings yourself. Look for signs of leaks or water damage and arrange an inspection if the odor persists.

A cleaner causes irritation or a strong reaction: Stop using it, leave the area, and follow the product label’s first-aid directions. If products were accidentally mixed, leave immediately and contact emergency services or poison control for guidance.

Frequently Asked Questions

Is black mold more dangerous than other mold?

Color does not identify the species or establish its risk. Any indoor mold growth should be addressed by removing it safely and correcting the moisture source.

Can I clean mold with vinegar?

For a small patch on a hard, nonporous surface, detergent and water are generally sufficient. Never mix vinegar with bleach or other cleaning products.

Should I use bleach on mold?

Bleach is not needed for routine cleaning of a small patch on a hard surface and may damage materials. Never combine bleach with ammonia, vinegar, or another cleaner.

Can I remove mold from drywall or carpet?

These porous materials can hold mold below the surface, so wiping may not remove it. Wet or mold-damaged sections may need professional assessment and replacement.

When should I hire a professional?

Get professional help for areas larger than about 10 square feet, hidden or recurring growth, contaminated water damage, or mold in materials that are extensively damaged. Ask for help if you cannot safely contain the work.

Do I need to test mold before cleaning?

Testing is usually not necessary to decide what to do about visible growth. Focus on safe removal where appropriate and fixing the water or humidity problem.

Further reading: U.S. Environmental Protection Agency. Details can change, so check the official page for anything that matters to you. Spotted a mistake? Tell us. How we write an answer.