Remediation

Containment is required to prevent mold spores from spreading to clean areas of your home while remediation work is in progress. When workers disturb mold-contaminated materials — cutting out drywall, removing insulation, sanding wood studs — they can release enormous concentrations of airborne spores. Without physical barriers, those spores travel through your home's air, settle on surfaces in unaffected rooms, and create new Condition 2 or 3 areas. The IICRC S520 Standard requires containment barriers — usually 6-mil polyethylene sheeting sealed to walls, ceilings, and floors — to physically separate the work area from clean spaces. HVAC vents inside the contained area must also be sealed so the air system doesn't carry spores throughout the building. In Texas, humidity makes this even more critical. You should not be living in a space where active mold demolition is happening without containment in place.

Based on: IICRC S520 Standard for Professional Mold Remediation (3rd Ed.)

Killing mold is not the same as removing it, and killing alone is not acceptable under professional remediation standards. The IICRC S520 Standard is explicit: attempts to kill or encapsulate mold are not adequate to solve the problem. Even dead mold is still a problem — mold spores and fungal fragments retain their allergenic and toxic properties after they die. If you kill the mold with bleach but leave the dead spores and hyphae in place, occupants can still experience health effects. Physical source removal — cutting out contaminated materials, HEPA vacuuming surfaces, and damp wiping — is the only method that actually eliminates the contamination. The goal is to return the area to Condition 1, and that requires removing the material, not just treating it. Bleach also has limited effectiveness on porous materials like drywall and wood.

Based on: IICRC S520 Standard for Professional Mold Remediation (3rd Ed.)

The level of Personal Protective Equipment (PPE) worn by remediation workers depends on how severe the contamination is. For most residential projects with Condition 2 or 3 contamination, workers should wear at minimum: a half-face respirator with HEPA (N100/P100) filter cartridges; disposable coveralls with hood and booties; nitrile or latex gloves; and eye protection. For larger or more heavily contaminated projects, full-face respirators or powered air-purifying respirators (PAPRs) may be required. If you see workers doing mold remediation in your Texas home without respirators or coveralls, stop the work and ask questions. Workers should also follow a decontamination protocol when exiting the work area — removing outer coveralls in an exit chamber, cleaning respirator exteriors, and washing hands.

Based on: IICRC S520 Standard for Professional Mold Remediation (3rd Ed.)

Thorough documentation is a core requirement of the IICRC S520 Standard. Required and recommended documentation includes: the written contract with scope of work and payment terms; the remediation work plan; before-and-after photographs of all affected areas; daily work activity logs; moisture meter readings taken throughout the project; records of what materials were removed and how they were disposed; documentation of containment setup and pressure differential monitoring; and post-remediation verification (clearance testing) results. The S520 Standard specifically notes that if there is a conflict between you and the contractor later, documentation is what resolves it. Remediators who resist providing documentation are a red flag.

Based on: IICRC S520 Standard for Professional Mold Remediation (3rd Ed.)

Non-porous materials — glass, metal, hard plastic — can generally be cleaned with a damp cloth and detergent, dried thoroughly, and kept. Semi-porous materials like wood and concrete can sometimes be cleaned, but if mold has penetrated the surface, cleaning alone may not be enough. Porous materials — drywall, ceiling tiles, carpet, insulation, upholstered furniture — almost always need to be removed and discarded if they are visibly moldy. Mold grows through the material, not just on the surface, so surface cleaning leaves active mold behind. The EPA guidance is direct: absorbent or porous materials that are moldy should be removed and bagged in plastic before disposal. The remediation protocol written by your MAC will specify exactly which materials must go.

Based on: EPA 402-K-01-001