Will Vinegar Kill Mold?

White vinegar can kill many types of surface mold, which is why it's a popular DIY fix. But it has real limits, and using it in the wrong situation can spread the problem.

Where vinegar can work

For a small patch of mold on a hard, non-porous surface — tile, glass, sealed countertops — undiluted white vinegar can be effective. Apply it, let it sit for an hour, then scrub and dry the area completely.

Where vinegar fails

• Porous materials (drywall, wood, carpet) — mold roots grow below the surface where vinegar can't reach
• Large areas — anything bigger than a small patch needs containment to avoid spreading spores
• Hidden moisture — if you don't fix the water source, the mold simply returns

The real fix: remove the moisture

Mold is a moisture problem first. Whatever you clean with, if the leak, humidity or ventilation issue stays, the mold returns. For anything beyond a small surface spot — or any mold on drywall, wood, or in an attic, basement or crawl space — professional mold remediation with containment is the safer choice.