Found mold during renovation: stop and do this
- Stop all renovation work in the affected area immediately — continuing spreads spores throughout the home.
- Close the door and seal any HVAC supply/return vents in the room with plastic sheeting and tape.
- Do not run fans or open windows in the mold area — airflow distributes spores to clean areas.
- Call CFDR at 321-420-7274 — a licensed Florida mold remediator (MRSR5370) assesses and quotes same day.
- Photograph the mold area thoroughly before anything is touched — this is insurance and legal documentation.
- Do not allow your renovation contractor to remove or clean the mold — Florida law requires a separate mold remediator license.
- Identify and stop the moisture source before or during remediation — mold returns if moisture is not fixed.
Opened the wall and
found mold.
Finding mold behind walls during a renovation is one of the most common surprise discoveries in Florida homes. It doesn't have to derail your project — but it has to be handled by a licensed professional, not your renovation contractor.
What happens if you keep going.
When contractors continue demolition through a mold-contaminated area without containment, every wall cavity opened releases spores. Power tools aerosolize them. HVAC systems distribute them to every room. What was a 50-square-foot contained remediation becomes a whole-home contamination event.
The cost difference is stark: a contained wall remediation runs $1,500–$4,000. A whole-home contamination from continued demo can run $15,000–$40,000 and may require temporary relocation.
Your contractor can't legally do this.
Florida Statute 468.8411 requires a separate DBPR-issued Mold Remediator license to perform mold remediation work. Your general contractor, remodeling company, or handyman cannot legally remove or treat mold — even if they're the ones who found it.
A licensed remediator handles the mold. Once they issue a clearance certificate, your renovation contractor can resume — with confidence that the area is clean and the project won't have to be redone.
CFDR Florida Mold Remediator License: MRSR5370
Renovation mold: the full picture.
Should I stop renovation work if I find mold behind a wall?+
Yes — stop immediately. Continuing renovation work after discovering mold without proper containment will spread mold spores throughout your home via HVAC systems and foot traffic. This turns a contained remediation project into a whole-home contamination issue and dramatically increases cost. Mark off the area, seal any HVAC returns in the affected room, and call a licensed Florida mold remediator (CFDR: 321-420-7274). The renovation cannot safely proceed until the mold is remediated and clearance testing confirms the area is clean.
Does homeowners insurance cover mold found during a renovation?+
Coverage depends entirely on the cause of the mold. If the mold grew from a previous sudden covered loss (like a pipe leak or roof breach that was repaired but never properly dried), your insurer may cover remediation. If the mold grew from a chronic moisture issue, poor ventilation, or long-term neglect, it is typically excluded as a maintenance issue. When mold is discovered during renovation, a licensed remediator documents the moisture source — this documentation determines whether the claim is approved. Call CFDR at 321-420-7274 before doing anything that disturbs the mold further.
In Florida, can my renovation contractor handle the mold, or do I need a separate company?+
In Florida, mold remediation requires a separate license from the DBPR (Department of Business and Professional Regulation). General contractors and renovation contractors may NOT perform mold remediation unless they hold a separate Florida Mold Remediator license. Allowing your renovation contractor to 'clean up' the mold without a license exposes you to liability, voids any remediation warranty, and can create problems with insurance claims and future home sales. CFDR's license is MRSR5370 — a licensed remediator handles the mold, then your renovation contractor can resume work.
How long will mold remediation delay my renovation?+
A contained wall cavity mold issue typically takes 3–7 days from remediation start to clearance certificate: 1–2 days for containment, HEPA filtration, removal, and antimicrobial treatment; 1–2 days for air drying and clearance air sampling; 1–2 days for the independent industrial hygienist's clearance report. If the mold is more extensive — multiple wall cavities, subfloor, or HVAC involvement — add 1–2 weeks. Budget a 10–14 day pause in your renovation schedule as a realistic baseline.
What causes mold behind walls in Florida homes?+
Common causes of hidden wall mold in Florida: slow plumbing leaks at supply lines, drain lines, or fixture connections; roof or flashing leaks that ran down interior wall framing; AC condensate line overflows that saturated walls; inadequate vapor barrier allowing exterior humidity into wall cavities; and shower or tub surround failures that allowed water migration behind tile. In Florida's climate, even a small, slow moisture source creates ideal mold conditions within weeks. The moisture source must be identified and repaired — not just patched — or the mold will return.
Found mold mid-renovation? Same-day assessment available.
Licensed Florida mold remediator (MRSR5370). Fast clearance so your renovation can resume. Ryan answers 24/7.