Find the water first, then the mold
Most hidden mold starts with a slow leak or a sweating duct that nobody has spotted yet. Call the line and we match you with an independent licensed inspector near Presidio who traces the water with meters and thermal imaging before anyone talks about tearing out drywall.
ESS Mold Inspection is a free referral line. Every inspection is performed by an independent local contractor, never by the line itself.
What an inspection actually is
Think of a proper mold inspection as detective work on the building itself. The inspector walks the property room by room, looks at ceilings, baseboards, window sills and the backs of closets, and takes moisture readings along the way. A pinless meter gets swept along walls and floors to find wet zones fast, then a pin-type meter confirms the number at the suspect spot by pressing two short probes into the material. Those readings get plotted on a sketch of the floor plan, which is what people in the trade call moisture mapping.
Thermal imaging won't show mold growth directly, no matter what the ads suggest. It shows temperature differences, and wet drywall or insulation usually reads cooler than the dry material around it, so a cold streak under a window tells the inspector exactly where to put a meter. A hygrometer gives relative humidity and dew point for each area. If the dew point sits close to the surface temperature of a wall, a duct or a window frame, condensation is forming there. When something looks suspicious inside a wall cavity, many inspectors drill a hole about the width of a pencil and look in with a borescope rather than opening up the drywall.
Here's what separates a useful inspection from a wasted afternoon: did anybody find the moisture source? If the leak, the condensation or the drainage problem stays, any cleanup is temporary. That's why the inspector checks the HVAC air handler, the evaporator coil, the condensate drip pan and drain line, the attic decking and vents, and the crawl space vapor barrier and joists, not just the room that smells. Homeowners around Presidio call this line when they're buying a house, after an old leak, or when a musty odor keeps coming back and nobody can explain it.
What you should expect
An inspection is only as good as the person holding the meter, so the line routes calls to inspectors who investigate first and have nothing to sell you afterward.
Every inspector the line routes to runs an independent business with liability coverage and any state mold assessor license that applies. Some states also bar the company that writes the protocol from doing the remediation on the same job, and even where it's legal, keeping them separate means nobody profits from inflating the scope.
Inspection calls are rarely emergencies, but real estate deadlines are. Tell the dispatcher your contingency date and the call gets routed to someone near Presidio with an open slot, and same-day visits are common when water is actively coming in.
Inspection pricing usually depends on square footage, the number of areas, and whether attic and crawl space access is needed. The quote comes before the visit; if the inspector thinks a lab sample could help, ask for the per-sample cost in writing ahead of time.
The kit should include a thermal camera, both styles of moisture meter, a hygrometer for humidity and dew point, and a borescope for looking inside wall cavities. If the person who shows up carries a swab kit but no meter, that's not an inspection.
Inspection types
Tell the dispatcher why you're calling, because a pre-purchase walkthrough and a hunt for a hidden odor are not the same visit.
Built around your option or contingency deadline, this visit looks for evidence of past and present water: stains under fresh paint, warped baseboards, rust on the water heater pan, efflorescence on basement block.
For the musty smell with nothing visible, the inspector works the odor like a trail, checking under sinks, behind the washer, around tub surrounds and along exterior walls with a thermal camera and meter.
Many musty houses trace back to the cooling system: a slime-clogged drain line, a rusted drip pan, wet insulation inside the air handler, or a coil that stays damp.
In the attic, the inspector looks for dark staining on roof decking, frost or condensation on nails, blocked soffit vents and bath fans that dump air into the insulation. Under the house, the checks cover wood moisture in joists and sill plates, the condition of the vapor barrier, and any pooling water.
After the cleanup crew says they're done, an independent inspector checks that the protocol was followed: visible growth gone, framing dry, containment still intact, and the original moisture source repaired. Lab clearance can be added if you need it, but the visual and moisture verification comes first.
Call the line and get matched with a local independent inspector who'll trace the water, document it and hand you a written scope.
How it works
Four steps, and you know the price before anyone pulls into your driveway.
The dispatcher asks why you need the inspection, how big the home is, whether there's an attic or crawl space, and if there's a real estate deadline.
An independent inspector near Presidio confirms a time, and same-day visits are common for active leaks. It helps to clear the path to the attic hatch, the furnace closet and the crawl space door.
The inspector walks every room, maps moisture with meters, scans with an infrared camera, logs humidity and dew point, and checks the HVAC, attic and crawl space. Any extra work, like lab samples, gets priced before it's done.
You receive a written report with photos, readings, the likely moisture source and a remediation scope you can take to any contractor.
From the dispatch log
These are the kinds of inspection calls that come in every week.
A caller described a smell that only showed up when the cooling ran, and nothing on the walls or ceilings looked wrong. The inspector found the condensate drain line clogged with slime, the drip pan overflowing, and wet insulation inside the air handler cabinet. Thermal imaging showed a damp patch on the closet ceiling below.
Outcome: The report pointed to the drain line and air handler, not the bedrooms, so cleanup stayed small and focused.
A buyer under contract noticed one bathroom ceiling looked newly painted and called with five days left in the option period. The inspector's pinless meter found elevated moisture under the paint, and a borescope through a small hole showed staining on the back of the drywall from a leaking shower valve above.
Outcome: The buyer used the written report to negotiate a repair credit before the option period closed.
After an upstairs dishwasher leak, a condo owner wanted to know whether the shared ceiling had actually dried out. Weeks later the kitchen ceiling had a faint ring. Moisture mapping found the wet area ran past the ring, and the dew point readings ruled out condensation as the cause.
Outcome: The report documented the extent of the moisture so the owner had evidence for the association and insurance.
A family called because allergy symptoms kept flaring at home, but they couldn't find mold anywhere. Room humidity sat near 70 percent. The inspector found a crawl space with a torn vapor barrier, damp joists, and gaps letting crawl space air into the return duct.
Outcome: The scope covered the vapor barrier, air sealing and humidity control, and the family took the report to their doctor.
These are composite examples based on common calls to the line, not individual customer reviews.
Questions
Call the line and get routed to an independent, licensed inspector near Presidio.
Call +1-844-326-4757An inspection is the investigation: the inspector walks the building, maps moisture, scans with thermal imaging and figures out why mold is growing and where. Testing is narrower and means collecting samples for a lab. Plenty of inspections never need one, because visible growth plus a wet reading already tells the story.
Most houses take somewhere between two and three hours from arrival to wrap-up. Add time for a large footprint, a hard-to-reach crawl space, extra air handlers, or several spots that need a borescope look. Expect the report a day or two after the visit.
In most cases, no. Moisture meters and an infrared camera work from the surface, and when the inspector needs to see inside a cavity, the standard move is a small drilled hole for a borescope. Anything bigger should be discussed and approved by you first, and in a rental, by the owner.
In most cases, yes. When the company that finds the mold also gets paid to remove it, there's an obvious incentive to write a bigger scope. Some states prohibit one company from doing both on a single job, and even where it's allowed, a separate inspector gives you a scope you can take to several remediators.
No rule requires one, though it makes sense when the listing or the general home inspection hints at water, like stains, a sump pit or a musty lower level. Schedule it right after your offer is accepted, so you have the report while you can still renegotiate or walk away.
A useful report has photos of each problem area, moisture readings and where they were taken, humidity and dew point by room, and thermal images with notes. It should name the likely moisture source and include a remediation scope or protocol covering what to remove, the containment needed and how the work gets verified.
Service area
Calls come in from every part of Presidio, whether it's a slab home with a closet air handler, a house over a damp crawl space, or a condo sharing walls and ceilings with neighbors. The dispatcher matches you with a nearby independent inspector who works separately from the cleanup side.
If there's a closing date, say so at the start of the call. With water actively coming in, stop it at the valve if possible, then call so the moisture can be mapped while it's still fresh.
