What to do when demolition exposes mold

  1. Stop work in that area

    Pause demolition near the growth and cover the opening with plastic.

  2. Bring in remediation

    Have a mold remediation contractor assess how far the growth and moisture extend.

  3. Map the moisture

    Take moisture readings in adjacent walls, since wet areas often run past what you can see.

  4. Contain, then continue

    Build containment before more material comes out, then resume the remodel in a dry, clean wall.

Why remodel crews should not just keep going

Ordinary demolition is designed to be fast, not dust-controlled. Tearing out moldy drywall with the same approach used for the rest of the room can send spores and fragments through the house, especially if HVAC returns are open nearby or the crew carries debris through finished areas.

Remediation changes the method: isolate the area, keep it under negative pressure, mist and bag materials, HEPA-vacuum and clean framing, and dry before closing. Some general contractors handle small areas themselves using these practices; larger areas are usually better handed to a remediation specialist.

Immediate steps when mold appears during demolition

  • Stop demolition in the affected area and keep other areas going only if they are well separated.
  • Cover the opening with plastic and tape it to limit spread.
  • Turn off or isolate HVAC returns serving that part of the house.
  • Photograph the find before anything else is removed.
  • Ask what wetted the area; the remodel plans should include fixing it.
  • Check whether the remodel contract addresses hidden conditions and how changes are approved.

Questions for the general contractor

  1. Will you handle the mold area yourself or bring in a remediation specialist?
  2. How will the change affect the schedule and the permit inspections?
  3. How will the remediation and rebuild be documented for the homeowner's records?
  4. If the home was built before the 1980s, has anyone tested for asbestos in the materials being removed?

General information for Cherry Hills Village, not a quote or professional advice. In an emergency, call 911.