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A triage guide: plumber, roofer, restorer, inspector, remediator, HVAC, or insurer.
Who you should call for mold damage depends on what is happening right now:
One company may coordinate several parts of the project, but no single trade fixes every source. The fastest path is to stop the water, understand where it traveled, and match the next professional to the condition.
$189 — fully credited toward remediation if you proceed
| What you observe | First call | Likely next step |
|---|---|---|
| Water is actively leaking from a pipe or fixture | Plumber or the appropriate emergency shutoff contact | Water extraction, moisture mapping, drying, and mold evaluation if conditions warrant |
| Water entered from a roof | Roofer | Interior moisture inspection, drying, and evaluation of damaged materials |
| Basement seepage or rainwater intrusion | Water-damage professional; foundation or drainage specialist as needed | Drying, source correction, and mold inspection if growth or odor is present |
| Appliance supply or drain leak | Plumber or appliance professional, depending on the source | Inspect cabinets, flooring, drywall, and concealed layers for retained moisture |
| Visible growth on drywall, framing, or cabinets | Mold inspector or experienced remediation company | Define the affected area and a remediation scope |
| Musty odor but no visible growth | Mold inspector | Moisture investigation and targeted testing only when it answers a defined question |
| Suspected mold at an air handler, return, or duct liner | Mold professional and qualified HVAC professional | Evaluate the system before operating or cleaning it |
| Sewage or other contaminated water | Professional experienced with contaminated-water damage | Controlled cleanup, drying, and evaluation of affected materials |
| Structural sagging, electrical danger, gas odor, or another immediate hazard | Leave the unsafe area and contact the appropriate emergency service or utility | Building and environmental work only after the immediate hazard is controlled |
| Occupant health concern | Healthcare professional | Building investigation can proceed separately but cannot diagnose the symptoms |
Mold work cannot succeed while water is continuing to enter the building.
If it is safe and you know how, shut off the local fixture or main water supply. Do not enter standing water near electrical equipment, touch a damaged electrical system, or climb onto a wet roof. Contact the appropriate trade.
The plumber repairs the source. A water damage restoration professional evaluates water that already reached building materials, extracts it when needed, and monitors drying.
Interior staining may not be directly below the roof opening because water can travel along framing or sheathing. After the exterior repair, the interior still needs to be evaluated for retained moisture and damaged material.
Mold Pro can evaluate the indoor mold and moisture impact, but permanent exterior drainage or structural waterproofing may require another specialist.
Call for water-damage restoration when water is active or materials are still wet. Time matters because porous materials can retain moisture even when the exposed surface appears dry.
EPA recommends drying wet or damp materials within 24 to 48 hours when possible to help prevent mold growth. That is a prevention target, not a promise that mold begins at one exact hour.
A water-damage response may include:
Read the complete mold-after-water-damage action plan after that article is published. Until then, the key sequence is simple: control the source, remove water, measure the materials, and dry promptly.
A professional mold inspection is the best first call when the problem needs investigation rather than immediate extraction.
Examples include:
An inspection should evaluate the building history, moisture source, accessible affected materials, and likely extent. A thermal camera or moisture meter can support the investigation, but neither instrument detects mold by itself.
If you can already see mold, testing is often not necessary merely to prove its presence. EPA says sampling is generally unnecessary in that situation. Testing can still be useful when it answers a specific project question. See Mold Inspection vs Mold Testing once that guide is published.
Call an experienced mold remediation company when mold-damaged materials have been identified or the project requires controlled removal and cleaning.
Professional involvement is especially important when:
EPA says that many small areas under about 10 square feet can be handled by an occupant, but it identifies important exceptions and advises experienced professional help for larger areas or extensive water damage. The visible patch may also underestimate what is behind the finish.
Do not treat a suspected HVAC condition as a routine duct-cleaning purchase.
EPA advises not to run an HVAC system if it is known or suspected to be contaminated because the system could spread mold through the building. A qualified evaluation should consider:
The mold professional and HVAC contractor should agree on responsibilities before work begins.
Review your policy and notify the insurer promptly when a covered loss may be involved. Coverage depends on the policy, cause, exclusions, endorsements, timing, and documentation. A contractor should not promise that a claim will be covered.
Before discarding materials when it is safe to wait:
The mold remediation cost guide explains project cost factors and questions to ask when comparing written proposals.
A useful first call is faster when you can answer these questions:
Photographs help with initial triage, but they do not replace an on-site evaluation when the extent or moisture path is unclear.
The assessment should lead to a decision, not only confirm that the homeowner is concerned.
Depending on the situation, the next-step recommendation might be:
The Potomac basement remediation case study and Gaithersburg kitchen case study demonstrate two different moisture sources. In both types of project, identifying how the water reached the material is as important as naming the visible damage.
Mold damage is rarely solved by choosing a trade based only on a stain. Start with the active source, the moisture path, and the affected materials. That sequence tells you whether the first call should be plumbing, roofing, water restoration, inspection, remediation, HVAC, or healthcare.
Mold Pro Solutions serves Bethesda, Potomac, Rockville, Gaithersburg, and surrounding Montgomery County communities. Call (301) 351-4508 or request an assessment.
If water is active, call the trade that can stop the source and a water-damage professional for affected materials. If the source is not active but you see growth or smell a musty odor, call an experienced mold inspector or remediation company.
Call a plumber for an active plumbing source. Call a mold company to investigate or remediate mold-damaged building materials. Many projects require both, with responsibilities clearly separated.
Call a roofer to correct the roof opening, then arrange an interior moisture and mold assessment. Repairing the roof does not automatically dry or restore the materials below it.
Not automatically. Begin with an inspection. Test when the result will answer a defined question or meet a project requirement. Visible mold often does not need sampling merely to confirm that it exists.
Some restoration companies have trained mold-remediation personnel and some do not. Ask who will perform the work, which standard guides the scope, how containment will be handled, and what documentation is included.
Schedule a moisture-focused mold inspection. Hidden growth may occur behind drywall, wallpaper, cabinets, flooring, or other finishes. Avoid opening a large area yourself because disturbing concealed material can spread dust and spores.
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