Mold Assessment in Metairie: Slab Leak or Sweating Wall?
A written finding that says whether the water is coming up through the slab, out of the room's own air, or not arriving at all.
Mold Assessment quote in Metairie
Tell us what you can see or smell, roughly where in the house it is, and whether the house is raised or on a slab. Those three things narrow it more than the size of the patch does, because they point at how the water is arriving rather than where it ended up.
Would you rather talk it through? Call (315) 640-3590.
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Metairie's 1960s and 1970s slabs, by the numbers
Metairie has 66,355 housing units with a median year built of 1972. Two decades account for almost half the entire stock: 16,528 units were built between 1960 and 1969 and 16,077 between 1970 and 1979. Only 1,654 units, 2.5 percent, predate 1940, and 61.2 percent of the stock is single family detached.
Source: United States Census Bureau, American Community Survey 2020-2024 five year estimates, accessed 2026-09-22
This metro carries both foundation types on the same streets. Raised pier and beam construction with an open or vented space underneath dominates the pre-war stock and much of what has been rebuilt since, because federal rule 44 CFR 60.3(c)(2) requires the lowest floor to sit at or above the base flood level. Slab on grade dominates the post-war suburbs, where the American Community Survey puts the median year built at 1972 in Metairie, 1976 in Terrytown and 1978 in Kenner and Chalmette.
Source: Office of the Federal Register, Electronic Code of Federal Regulations, Title 44 Section 60.3, accessed 2026-09-22
Metairie records 2,334 National Flood Insurance Program multiple loss properties, of which 179 are severe repetitive loss, 642 have four or more paid losses, 1,756 predate the community's first flood insurance rate map, and 294 have been mitigated.
Source: Federal Emergency Management Agency, OpenFEMA dataset NFIP Multiple Loss Properties, data as of August 2, 2026, accessed 2026-09-22
The EPA advises that if the moldy area is less than about 10 square feet, less than roughly a three foot by three foot patch, in most cases a homeowner can handle the job themselves.
Source: United States Environmental Protection Agency, accessed 2026-09-22
Why a Metairie survey starts at the slab edge
The point of a survey in Metairie is to stop the wrong trade being sent. 32,605 of the town's homes were built in the 1960s and 1970s, and the metro's post-war suburbs are slab on grade, where the plumbing runs beneath the floor. Damp at the foot of a wall there has two likely causes that look identical on the paint: a line leaking under the slab, or a cooled wall gathering summer condensation. One needs a plumber and the other may need nothing more than a different finish and a dehumidifier. Meter readings along the bottom plate, set against surface temperature and dew point, tell them apart.
What a Metairie homeowner should settle before the survey
Decide what the report is for before booking. If an insurer or a plumber is going to act on it, the moisture map along the slab edge is the page that matters, so ask for it dated and photographed. Metairie has no city hall, which means any later permit or floodplain question goes to Jefferson Parish, and 1,756 of the town's 2,334 repeat-loss properties were built before the first flood map, so an older slab here may never have been set to any elevation rule. And if the patch is under about ten square feet, the EPA's view is that most homeowners can clean it themselves once the water is found.
How high the mark climbs
Damp confined to the first foot of wall points toward the slab. Damp that is highest mid-wall, and worst in summer, points toward condensation on a cooled surface.
Whether the water bill has moved
A bill that rose with no change in use is free evidence of a hidden line leak. Bring the last few to the visit.
Whether the house has taken water before
Of Metairie's 2,334 repeat-loss properties, 294 have been mitigated. If yours has flooded, say so: it changes what the report must document.
Bottom foot of the wall, or higher up?
Tell us where the mark starts and where it stops. On a Metairie slab that one detail points the survey at the plumbing or at the air.
What follows a Metairie survey
Metairie slab and survey questions
Can a survey find a leak inside the slab without breaking the floor?
It can usually narrow it down. Meters and thermal imaging along the bottom plate and baseboard show where the concrete edge is wettest, and that tells a plumber where to test. The survey does not repair the line, and under Louisiana law the company that remediates a property is kept apart from the one that assesses it, so the finding goes to whoever you choose next.
Our Metairie house sits below sea level. Is ground water coming up?
The ground is wet but controlled. Metairie's interior point is 4.79 feet below sea level, and the USDA description of the Harahan soil mapped through developed Jefferson Parish puts the water table 12 to 36 inches down most of the year, held there by levees and pumps. Whether that moisture is reaching your floor is exactly what the readings along the slab edge are for.
Send the Metairie room and the height of the mark
A person reads it and says whether a survey is worth paying for, or whether a plumber should go first.