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Will Bleach Kill Crawl Space Mold?

Floor joist with mold in crawlspace.

In a previous article, we discussed crawl space mold and its causes.

This page answers the question, “Will bleach kill crawl space mold?ˮ

The answer is simple, so we wonʼt waste your time. Here’s what you need to know:

Will Bleach Kill Mold in a Crawl Space?

Mold on crawlspace wooden beam

The active ingredient in bleach, sodium hypochlorite, usually comprises only 3-5% of the solution and may not penetrate deeply enough to eliminate crawl space mold at its core.

Standard bleach solutions, predominantly water-based (typically 95-97%), can seep into porous surfaces like unfinished crawl space wood materials. This moisture may inadvertently create an environment conducive to fungal growth beneath the surface.

Similar limitations apply to household antimicrobial agents, like white vinegar and hydrogen peroxide, which cannot entirely eliminate mold and only address surface-level contamination.

How to Remove Mold in a Crawl Space DIY

Crawl space repair with FSS.

DIY mold removal is often more accessible than hiring a professional. However, we do not recommend at-home solutions for the following reasons:

  • Safety Risks: Crawl spaces pose safety risks due to the small, dark, and confined area.
  • Potential Pest Infestation: Unkept crawl spaces often harbor pests and rodents, potentially causing health hazards.
  • Chemical Exposure: Inhaling bleach in an enclosed crawl space area is dangerous.

Hiring a mold remediation expert is the safest solution for removing crawl space mold.

What to Do Next

Foundation Support Specialists work truck

Safety should always be your top priority for any home repair project. We urge you to contact a mold remediation professional for a long-term solution. 

Learn more by exploring our resource pages. You will discover valuable information on crawl space mold and other foundation repair topics there.

Interested in crawl space encapsulation and repair services for mold prevention? Contact Foundation Support Specialists for a free inspection. Click the link below to get started! 

Shaye Glisson

Shaye Glisson

Shaye is an SEO Content Writer for Groundworks with over twelve years of experience creating helpful content across various industries, including home services and retail. She is a Gulf Coast native and writes from her firsthand knowledge of the area's hurricane and flood impacts on the local community. In her free time, Shaye enjoys exploring the local food and music scenes.

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