Why Bleach is NOT the Best Way to Kill Mold
Many people believe bleach is the best solution for mold removal, but that’s a myth. While bleach may whiten mold stains, it does not kill mold at its roots, and in many cases, it can make the problem worse.
Why Bleach is Ineffective Against Mold
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Bleach Only Works on Non-Porous Surfaces
- It can disinfect tile, glass, and countertops, but it does not penetrate porous materials like drywall, wood, or concrete. Mold grows deep into these surfaces, and bleach only affects the surface layer.
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Bleach Can Make Mold Worse
- Bleach contains a high percentage of water. When applied to porous surfaces, it feeds the mold underneath while only killing surface-level spores. This allows the mold to return even stronger.
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Bleach Does Not Remove Mycotoxins
- Some molds, such as Stachybotrys (black mold) and Chaetomium, produce mycotoxins that linger even after the mold is gone. Bleach does not neutralize these harmful toxins.
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Bleach Evaporates Quickly
- While bleach can kill some mold spores on hard surfaces, its effects are temporary because it evaporates quickly, allowing mold to regrow if moisture is still present.
What to Use Instead of Bleach
- Botanical Mold Cleaners – Products containing thymol (thyme oil) are EPA-approved for mold remediation and safer for indoor use.
- Hydrogen Peroxide (3% - 10%) – Breaks down mold at the root and does not leave toxic residue.
- White Vinegar – Kills many mold species and helps prevent regrowth.
- Professional Mold Remediation – If mold is spreading or inside walls, professional testing and treatment may be needed.
Bleach is NOT the solution for mold problems. Proper removal and moisture control are the only ways to effectively eliminate mold and keep it from coming back.
https://www.epa.gov/mold/should-i-use-bleach-clean-mold
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