Understanding HSE 107.202 Level 1 Mold Remediation Guidelines: A Complete Evergreen Guide

What Is HSE 107.202 and Why Level 1 Matters

The Health and Safety Executive (HSE) 107.202 regulation outlines mandatory practices for safely removing mold in non‑industrial settings. Level 1 applies to low‑risk, visible mold infestations (typically < 10 m²) where no structural damage or toxic species are present. Following these guidelines protects occupants, limits liability, and ensures compliance with UK law.

Key Definitions and Scope

Before diving into the steps, understand the core terms used throughout the regulation:

• Visible Mold: Any fungal growth that can be seen with the naked eye.
• Level 1 Remediation: Minor contamination that can be handled with basic PPE and simple containment.
• Controlled Environment: A work area isolated from adjoining spaces to prevent spore spread.

Step‑by‑Step Level 1 Mold Remediation Process

1. Initial Assessment

Conduct a visual inspection, record the affected area, and collect a surface sample for laboratory confirmation if species identification is required.

2. Containment Setup

Seal off the work zone using plastic sheeting and duct tape. Create a negative‑pressure environment with a portable exhaust fan vented outdoors.

3. Personal Protective Equipment (PPE)

All personnel must wear:

• Fit‑tested N95 respirator or higher
• Gloves (nitrile)
• Protective goggles
• Disposable coveralls

4. Removal Method

For non‑porous surfaces, scrub with a detergent‑water solution and a soft brush. Porous materials (e.g., drywall) exceeding 10 mm thickness should be removed and disposed of as hazardous waste.

5. Decontamination and Cleaning

Wipe all tools and surfaces with a 1 % sodium hypochlorite solution, then rinse with clean water. Allow the area to dry completely before re‑occupancy.

6. Post‑Remediation Verification

Perform a visual check and, if possible, an air‑sampling test to confirm spore counts are below 10 CFU/m³, the HSE acceptable limit for Level 1.

Safety and Health Requirements

HSE 107.202 mandates a written risk assessment, documented PPE checks, and a clear emergency procedure for accidental exposure. Workers must receive training on mold identification, safe handling, and spill response before starting any remediation work.

Documentation and Record‑Keeping

Maintain a remediation log that includes:

• Date and time of work
• Areas treated and square footage
• PPE used and inspection dates
• Materials removed and disposal method
• Post‑remediation test results

These records are required for at least three years and may be requested during an HSE audit.

Compliance Checklist

Common Pitfalls and How to Avoid Them

Even experienced contractors can slip up. Below are frequent errors and corrective actions:

• Under‑estimating area size – Measure twice; include hidden corners.
• Using inappropriate cleaning agents – Avoid bleach on metal; use mild detergent first.
• Skipping post‑remediation testing – Documented air tests are essential for compliance.

Cost Estimates and Timeframes

Level 1 remediation is relatively inexpensive. Typical UK rates range from £15‑£25 per square metre for labour, plus material costs (£5‑£10/m²). A 5 m² job usually completes within 4‑6 hours, including set‑up and verification.

When to Upgrade to Level 2 or 3

If any of the following are observed, Level 1 is insufficient:

• Mold coverage >10 m²
• Presence of Stachybotrys chartarum or other toxic species
• Structural damage or moisture sources beyond simple leaks

In such cases, consult HSE 107.202 Level 2/3 protocols, which require certified specialists and more extensive containment.