Home / Moisture Detection & Leak Tracking
NY State Lic. #24-6A4P4-SHMOHidden Moisture Found and Mapped With Thermal Imaging and Calibrated Meters
Written moisture map with readings and images — not a verbal opinion.
What it covers
What Moisture Detection & Leak Tracking Actually Covers in an NYC Building
Moisture detection is the step that tells you what is actually inside the wall — before anyone touches it.
Moisture detection and leak tracking — the diagnostic identification of concealed moisture sources, active or inactive leak pathways, and hidden water accumulation — uses thermal imaging (an infrared camera that detects surface temperature differentials), calibrated moisture meters, and systematic surface mapping to locate problems that have not become visible damage yet.
This is not a remediation service. It is the step before remediation. It is also the step that determines whether remediation is even necessary.
The result is a written moisture map. That document shows where moisture is elevated, at what level, and in what material. It is useful to a property owner, a managing agent, an insurance adjuster, or an attorney — regardless of what comes next.
Where the map shows work is needed, the scopes that follow are water damage restoration or licensed mold remediation, depending on what the readings and conditions show.
Pre-war assemblies
Why Pre-War Co-op and Condo Buildings Make Concealed Leaks So Hard to Find
NYC’s older building stock holds moisture inside its walls longer than modern construction does.
Park Slope, Carroll Gardens, and Boerum Hill have high concentrations of co-op and condo conversions in Brooklyn. Most of those buildings were constructed before 1940. Their walls are thick masonry or plaster-and-lath assemblies — wall systems that absorb and retain moisture differently than modern drywall.
Water in these buildings does not travel straight down. It follows pipe chases, masonry joints, and structural penetrations, often moving several feet horizontally before it ever surfaces. By the time paint softens or a smell appears, the moisture source may be in a completely different part of the wall or ceiling assembly. That is what makes concealed leaks in pre-war construction so difficult to locate without equipment.
The dispatch base at 1419 Coney Island Ave puts our crew within a 10 to 15 minute surface-street reach of those Brooklyn neighborhoods via 4th Avenue and Atlantic Avenue — no highway delays, no borough crossings.
- Thick masonry and plaster-and-lath absorb and hold moisture differently than drywall
- Water moves laterally along chases, joints and penetrations before it surfaces
- The visible symptom is often feet away from the actual source
From the field
I Found the Moisture Three Months Before That Wall Was Ever Opened
“Concealed moisture in a co-op wall can be active for months before it becomes visible damage.
I have been to jobs where the call comes in after an unrelated repair opens a wall. That is when everyone discovers the mold that has been growing on the back of the drywall since the previous winter. The resident noticed the paint was slightly soft. The unit above said their pipes were fine. The super looked and shrugged. Three months passed.
When I run a moisture detection job, the first thing I do is set up the thermal imaging camera before I touch a single surface. The camera detects temperature differentials — wet materials cool at a different rate than dry ones, so it shows me where moisture is present without opening anything. I move across the full symptom zone in a grid pattern.
Then the calibrated moisture meter confirms what the camera flagged. Calibrated means it is set to the specific material — wood, concrete, drywall — not a generic baseline. A reading accurate for drywall is not accurate for the plaster-and-lath walls in a pre-war Brooklyn co-op. The two instruments together produce a moisture map: a spatial record of elevated readings, documented in writing with images attached.
NYC co-op liability disputes — conflicts between shareholders or between a shareholder and the board over where water came from and who is responsible — are easier to resolve when there is a factual moisture record dated from before remediation began. The map records what happened and where.
Either outcome
Your Written Moisture Map Is Useful Whether or Not You Need Remediation
A pre-remediation diagnostic establishes what is present — before any work changes the condition of the building.
Here is a scenario that comes up more often than people expect: the moisture map comes back clean. The wall is dry. The smell was something else. The property owner gets confirmation that the building materials are within normal range and nothing needs to come out. That is a good outcome, and it is one you can only reach through actual measurement.
If the map shows elevated readings, the report defines the remediation scope accurately. That prevents over-remediation — removing materials that were not affected — and under-remediation, missing affected areas that were not identified before work started.
Pre-remediation diagnostic work makes every subsequent job more precise and better documented for insurance or HPD review. Where the readings cross the threshold for growth, licensed removal follows under Article 32 through the NY State Department of Labor mold program, with an independent assessor writing the scope.
What the written report contains
- Thermal images
- Annotated, showing where differentials appeared
- Readings
- Zone by zone, quantified against material baseline
- Material notes
- What each reading was taken on
- Leak pathway
- The route traced from readings, not assumed from the symptom
- Findings
- A plain-language summary of what is present
- Next step
- Remediation scoping, plumbing follow-up, or confirmation of normal range
Our standards
Our Standards for Every Moisture Detection Job We Run in New York City
Every detection job follows a documented protocol — thermal scan first, meter confirmation second, written report always.
Thermal imaging
Used on every job, across the full symptom zone, before any surface measurement begins. Concealed leaks frequently surface several feet from their actual source, so the scan covers the zone rather than the stain.
Calibrated meters
Set to the specific material being measured — wood, concrete, drywall, or plaster — not a generic setting. A reading accurate for drywall is not accurate for plaster-and-lath.
Pathway tracing
The route water travels from origin to where damage appears is traced from the readings rather than assumed from the symptom location.
Written map
Produced for every job, with zone-by-zone readings, annotated thermal images, and material notation. Structured to be legible to a property owner, managing agent, adjuster or attorney without translation.
A verbal opinion does not resolve a co-op dispute. A dated map does.
Call 212-432-5803
Three stages
How We Run a Moisture Detection and Leak Tracking Job
Thermal scan, meter confirmation, and written report — in that order, every time.
The job begins with a full thermal imaging scan of the symptom zone. The infrared camera identifies surface temperature differentials across the walls, ceiling, and floor within the defined area. Wet materials hold and release heat differently than dry materials, and that difference appears on the thermal image as a temperature contrast. This stage covers the full zone, not just where the symptom is visible.
Every area flagged by thermal imaging then receives direct moisture meter readings. The meter confirms moisture presence and quantifies it against the normal baseline for that material type — concrete has a different acceptable range than drywall or hardwood flooring. Adjacent materials not flagged by the camera also get tested, because moisture can be present in a substrate without producing enough surface differential to appear on the scan.
The final deliverable is a written moisture map with thermal images, meter readings by zone, material notations, and a plain-language summary. It identifies where moisture is elevated, at what level, and in what material, and includes a recommended next step — whether that is remediation scoping, a plumbing follow-up, or confirmation that the assembly is within normal range. Where a plumber has already repaired a slab line, slab leak cleanup is the scope that follows.
Coverage
Brooklyn and Manhattan Neighborhoods We Serve
We run moisture detection jobs across all five NYC boroughs, with fastest reach to Brooklyn and lower Manhattan.
Park Slope & Carroll Gardens
Pre-war co-op and condo conversions, 10 to 15 minutes from dispatch.
Cobble Hill & Boerum Hill
Masonry assemblies where water moves laterally before surfacing.
Prospect Heights & Crown Heights
Converted buildings with original chases and penetrations.
Upper West Side & Morningside Heights
Manhattan co-ops via the Battery Tunnel or Manhattan Bridge.
Washington Heights & Inwood
Older stock with concealed riser runs.
Queens, Bronx & Staten Island
Served from the same Brooklyn dispatch base.
If your building is in New York City, we serve it.
Get started
Ready to Find Out What’s Inside That Wall?
Describe what you have noticed — the soft paint, the smell, the stain that keeps coming back.
212-432-5803Or email contact@moldwaterremediation.com. We will explain what detection involves for your building type and borough. The written moisture map tells you exactly what is there and what, if anything, needs to happen next.
Have this ready when you call
That is enough for us to plan the scan zone before we arrive.
- Your building type and borough
- Which room or wall concerns you
- What you have noticed — soft paint, smell, stain
- Whether anyone has opened the wall already
FAQ
Questions Owners and Boards Ask About Moisture Detection
The super looked and could not find anything. What will you do differently?
A visual check finds the symptom, not the source. Water in a pre-war building moves laterally along pipe chases and masonry joints, often several feet before it surfaces, so the wet paint and the leak are frequently in different parts of the assembly. Thermal imaging shows where moisture is present without opening anything, and the meter then quantifies it.
What if you find nothing?
Then you have confirmation in writing that the assembly is within normal range and nothing needs to come out — which is a genuinely good outcome and one you can only reach by measuring. We do not manufacture a scope to justify the visit.
Is this a remediation service?
No. It is the diagnostic step before remediation, and it is also the step that determines whether remediation is necessary at all. If the map shows elevated readings, it defines the scope precisely, which prevents both removing material that was never affected and missing areas that were.
Can I use the report in a co-op dispute?
That is one of the most common reasons people book it. Disputes between shareholders, or between a shareholder and the board, turn on where the water came from and who is responsible. A dated moisture record produced before any remediation changed the building is a factual starting point rather than competing opinions. The report is written to be read by an owner, managing agent, adjuster or attorney without translation.
Why does it matter that the meter is calibrated?
Because a reading accurate for drywall is not accurate for the plaster-and-lath walls in a pre-war Brooklyn co-op, and concrete has a different acceptable range again. Setting the instrument to the material is the difference between a number and a meaningful number.
Do you have to open the wall?
Not for the detection itself — that is the point of it. Thermal imaging and surface meters produce the map without opening anything. If the readings show work is needed, opening happens later under the correct scope, and only to the boundary the data supports.
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