Limit access
Close off affected rooms and post signs. Keep occupants out of spaces with visible growth or a strong musty odor.
Commercial property has suspected mold or moisture damage?
Mold in offices, schools, healthcare and multifamily buildings affects occupants and can require containment and clearance testing. Fix the moisture source and call 833-877-1717. RepairNowUSA connects the request. An independent provider does the work.
Am I in the right place?Yes for visible mold, musty odors, or mold after leaks in commercial buildings.
Is this urgent?More urgent with sensitive occupants, HVAC involvement or large areas.
What do I do next?Limit access to affected areas and call 833-877-1717.
Residential: mold remediation.
RepairNowUSA editorial review · Last substantively reviewed October 14, 2026 · Review standards
What to do now
Stop the moisture
Find and stop the leak, condensation or humidity problem. Remediation does not last if the source keeps feeding the mold.
Notify the right people
Tell building management, the property owner and, where appropriate, tenants or staff. Check your lease, policies and any local notification rules.
Occupant health
Mold can trigger asthma and allergies. EPA guidance recommends professional remediation for large areas or HVAC contamination. Some jurisdictions require licensed remediators.
Common situations
After a water loss
Burst pipes, sprinkler discharge and roof leaks can leave hidden moisture inside walls, ceiling tiles and under flooring.
HVAC systems
Drain pans, coils, ductwork and air handlers can grow mold and spread spores through the building. HVAC contamination needs special handling.
Roof leaks and ceiling tiles
Stained or sagging acoustic tiles often hide wet insulation and decking above. See commercial roof leak repair.
High humidity spaces
Basements, storage rooms, locker rooms and buildings shut down for long periods can grow mold without a single leak.
What to have ready when you call
- Property ZIP code and building type
- Approximate size of the affected area and which floors, units or rooms
- The water event or moisture source, if known
- Whether the HVAC system may be involved
- Occupancy and operating impact, such as classrooms, patients or tenants
- Who can authorize the work and any vendor requirements, such as a COI
How commercial mold remediation usually works
- Assessment and plan. The provider identifies the moisture source, maps the affected area and writes a scope, often with a phased plan for occupied buildings.
- Communication. Owners and managers decide how to inform occupants. EPA’s guide for schools and commercial buildings stresses communication throughout.
- Containment. Work areas are sealed and kept under negative air pressure with HEPA filtration. HVAC serving the area may be isolated.
- Removal and cleaning. Contaminated porous materials are removed and bagged. Hard surfaces are cleaned and the area is dried.
- Verification. Many projects end with a visual check and, where required or requested, independent post-remediation testing before rebuild.
After-hours and phased work can reduce disruption. Some jurisdictions and building types have specific licensing, notification or clearance rules, so confirm them with the provider and your compliance team.
What happens when you call RepairNowUSA
- Describe what is happening in plain words and give the property ZIP code. You do not need to know which trade to ask for.
- RepairNowUSA checks for a participating independent provider who handles commercial mold remediation in that area.
- If one is available, you are connected. The provider confirms timing, access, scope and price with you before any work.
- The provider, not RepairNowUSA, diagnoses and performs the repair.
RepairNowUSA is a referral and connection service. Provider availability and response times vary by location, time and demand, and are not guaranteed. Before you approve work, ask what was found, the price, the timing and what is not included.
Call 833-877-1717Commercial property has suspected mold or moisture damage questions
Is clearance testing required?
Requirements vary by jurisdiction and building type. Many commercial projects use independent post-remediation verification so the remediator is not grading its own work.
Can the building stay open during remediation?
Often, with containment, negative air pressure and scheduling around occupants. Healthcare, schools and other sensitive settings may need stricter measures.
Does the HVAC system need to be shut down?
If the HVAC serves the affected area or is contaminated itself, it may need to be isolated or shut down during the work. The provider will advise based on the layout.
Who should hire the remediator: owner or tenant?
It depends on the lease and who controls the space and the systems. Check the lease and involve the property owner early.
Does commercial insurance cover mold?
RepairNowUSA cannot answer for your policy. Many policies limit or exclude mold unless it results from a covered water loss. Document the event and contact your broker or insurer.
Can I call at night or on a weekend?
Yes. You can call 833-877-1717 at any time, including nights, weekends and holidays. Whether an independent provider can come out right away depends on your ZIP code, the time and provider capacity, so availability is not guaranteed.
Authoritative references
These public sources give general safety context. They do not replace an on-site evaluation, and RepairNowUSA does not perform the work.