What remediation actually means
Remediation is not the same as spraying a surface and wiping it down. It is a controlled process for physically removing mold growth from a building and returning affected materials to a normal condition, while keeping spores from spreading into clean areas. The IICRC S520 standard for professional mold remediation describes this approach, and it is the framework our Deforest, WI crews follow. The standard emphasizes removal over simply killing growth, because dead mold can still contain allergens and irritants.
Starting with moisture
Mold grows where moisture persists. Roof leaks, plumbing drips, condensation on cold surfaces, poor bathroom ventilation and past water damage that was never fully dried are the usual causes. If the moisture source is not found and corrected, growth tends to return. For that reason, our assessment always includes a moisture investigation with meters and thermal imaging, and the remediation plan includes steps to stop the water, whether that is a plumbing repair, a roof fix or a ventilation change handled by the right trade.
Containment and air control
The size and location of the growth determine how the work area is set up. Small areas may need only limited containment, while larger projects call for full enclosures of plastic sheeting with zippered entry points. Negative air machines draw air out of the enclosure through HEPA filters, so disturbed particles are captured rather than drifting into the rest of the building. HVAC vents in the work zone are sealed to keep spores out of the ductwork.
Containment stays in place and the air machines keep running for the full duration of removal and cleaning. Technicians inside the enclosure wear respirators and protective clothing, and they check the barriers throughout the day for tears or gaps. Doing this consistently is what keeps a remediation project from turning one contaminated room into several.
Removal and cleaning
Porous materials with growth, such as drywall, ceiling tiles, insulation and carpet, are cut out, bagged inside the containment and removed. Structural wood with surface growth is usually cleaned by HEPA vacuuming, wire brushing or sanding, followed by damp wiping. Hard surfaces are cleaned with suitable products. After removal and cleaning, the area is HEPA vacuumed again and allowed to dry.
Some property owners request independent post-remediation verification, in which an outside professional inspects the area and, if desired, collects samples. We are glad to leave containment in place until that evaluation is complete. Our Mold Testing Inspection page explains testing in more detail.
Rebuilding the space
Once the area passes inspection and moisture readings are normal, the containment comes down and reconstruction begins. New drywall, insulation and finishes restore the room. If growth was extensive and dark in color, our Black Mold Removal page covers how heavy growth situations are handled, including the extra precautions used when colonies have rooted deep into building materials.
Remediation scope
- Moisture investigation and source identification
- Containment sized to the affected area
- Negative air with HEPA filtration
- Removal of contaminated porous materials
- HEPA vacuuming and cleaning of framing
- Access for independent verification on request
Remediation workflow
- 1
Assess
Growth is mapped and the moisture source is identified.
- 2
Contain
Barriers and negative air protect the rest of the building.
- 3
Remove and clean
Affected materials come out and remaining surfaces are cleaned.
- 4
Verify and rebuild
The area is checked, then finishes are restored.