How to Dry Crawlspaces

Drying out crawlspaces can be challenging and time-consuming due to their confined nature and the materials often found within them.

Effective August 3, 2015, OSHA implemented a rule to enhance safety in confined spaces, which was in part a response to fatalities in such environments. This rule is essential for understanding how to safely work within crawl spaces. Permits to access specific confined spaces are now required and must be granted by the general contractor or lead contractor on each job.

Key Criteria for a Confined Space:

• Large enough for a worker to enter
• Limited means of entry or exit
• Not designed for continuous occupancy

Additional conditions such as hazardous atmospheres, potential for suffocation, or layouts that could trap a worker can also classify a space as permit-required confined space.

Employers must train workers on the existence, location, and dangers of each permit-required confined space and maintain records for inspections by OSHA or in the event of an accident or complaint.

Step-by-Step Guide: How to Dry Out a Crawlspace

1. Debris Removal: Begin by removing all debris to clear the space for efficient drying.
2. Water Extraction: Remove any standing water found in the crawl space.
3. Drying: Use a heat-based or desiccant system with appropriate ducting to dry all structural materials and flooring. The low clearance and moisture-retaining nature of materials used in crawl spaces make this a crucial step.
4. Daily Monitoring: Use moisture meters to monitor the drying progress daily.
5. Disinfection: Apply MediClean® Disinfectant Spray Plus to all structural surfaces to prevent microbial growth.
6. Surface Cleaning: For any contaminated surfaces, use Fiberlock Advanced Peroxide Cleaner for effective cleaning.
7. Re-Drying: Re-dry surfaces as necessary to ensure complete moisture removal.
8. Mold Prevention: If moisture or humidity has been or could be a recurring issue, apply a Mold Preventative Coating to all structural surfaces, including walls and ceilings.
9. Vapor Barrier Installation: Install a vapor barrier to prevent future moisture ingress.
10. Dehumidifier Installation: Consider installing a crawl space dehumidifier for long-term moisture control.