See the water inside the roof before it shows up on a ceiling.
Drone thermal imaging and high-resolution aerial mapping that locate trapped moisture in commercial flat roof assemblies — non-destructive, measurable, and documented.
Most commercial roofs fail from the inside out. Water enters through one small breach, saturates the insulation beneath the membrane, and spreads silently for seasons before a tenant ever reports a drip. A drone thermal moisture survey makes that hidden damage visible: after sunset, wet insulation radiates stored heat while the dry field cools, and the infrared camera maps the difference across the whole roof at once. P91 Roofing flies commercial properties throughout The Woodlands, Conroe, Spring, Tomball, Magnolia, and greater Houston.
P91 Zero-Leak GuaranteeWhat we deliver
- Non-destructive infrared scan — no cutting, no disruption
- Full-roof coverage in one flight, including unsafe-to-walk areas
- High-resolution orthomosaic with measurable square footage
- Anomalies verified with moisture readings or core samples
- Wet vs. dry assembly percentages for capital planning
- Fully insured crews, 5-year workmanship warranty on repairs
How infrared finds what a walk-through misses
Dry insulation releases the day's solar heat quickly. Insulation holding water does not — it stores far more energy and radiates it for hours after sunset. Flown in that window, a calibrated thermal sensor renders saturated zones as clear warm signatures against a cool membrane. A visual inspection from the roof surface sees an intact membrane above all of it, which is exactly why moisture problems go unbudgeted until the deck is involved.
Aerial mapping turns findings into measurements
Thermal imagery alone tells you something is wrong; paired with a scaled aerial orthomosaic it tells you exactly where and how much. We stitch hundreds of overlapping frames into one geometrically accurate map, overlay the thermal anomalies, and report each area in square feet. Scopes and bids built from that map are comparable to each other, because every contractor is pricing the same measured area.
Verification keeps the report honest
Standing water, HVAC exhaust, and ponding shadows can all mimic a moisture signature. We confirm representative anomalies with a moisture meter and, when the area is large enough to change the recommendation, a small core sample patched the same visit. A survey that has not been verified is a picture, not a finding.
What the results change about your budget
If under roughly a quarter of the assembly is wet, targeted removal and replacement of those sections plus a restoration coating is usually the lower-cost path and extends service life meaningfully. Past that threshold, replacing the assembly is normally cheaper over the next ten years than chasing spreading saturation. The survey exists to tell you which side of that line your roof is on — before an emergency decides for you.
Baseline surveys and storm documentation
A scan at acquisition, at warranty expiration, or right after a hail event creates a dated baseline. When a claim is filed later, that file shows what the roof looked like before the event and what changed after — the single most useful piece of evidence in a disputed commercial claim.
What the survey delivers
- Aerial orthomosaic
- Scaled, stitched high-resolution map of the entire roof — accurate square footage, penetration counts, and measurable repair areas.
- Thermal moisture map
- Every anomaly outlined, measured, and located against the orthomosaic so a crew can find it without guesswork.
- Verification readings
- Moisture meter or core confirmation on representative anomalies, so the report distinguishes trapped water from surface heat artifacts.
- Wet vs. dry square footage
- The number ownership actually needs: how much of the assembly is compromised, expressed as a percentage of total area.
- Repair / restore / replace comparison
- Costed options with the reasoning behind each, formatted for capital planning or a carrier submission.
FAQ
What is a commercial roof thermal moisture survey?+
It is a non-destructive scan that finds trapped water inside the roof assembly. Wet insulation holds heat longer than dry insulation, so after sunset an infrared camera sees saturated areas glow warm against a cooler dry field. We fly the roof with a thermal-equipped drone, map every anomaly, and confirm findings with a moisture meter or core sample.
Why fly a drone instead of walking the roof?+
A drone captures the entire roof in one continuous dataset, including parapets, edges, and areas that are unsafe or impractical to walk. High-resolution aerial imagery is stitched into a scaled orthomosaic, so measurements, repair areas, and anomaly locations are accurate rather than estimated.
When is the scan flown?+
Thermal scans require a clear day followed by a dry evening. We fly in the window after sunset once the dry membrane has released its heat and the wet areas have not — typically one to three hours after dusk. Rain within the prior 24 to 48 hours usually means rescheduling.
Does the inspection damage the roof?+
The scan itself is completely non-destructive. If a core sample is needed to verify a large anomaly, it is a small cut that we patch the same visit with a permanent detail.
What do we receive afterward?+
An aerial orthomosaic, a marked thermal moisture map with each anomaly outlined and measured, square footage of wet versus dry assembly, verification readings, and a recommendation comparing targeted replacement of wet sections, restoration, or full replacement with costs.
Why does trapped moisture matter if the roof is not leaking yet?+
Saturated insulation loses most of its R-value, drives up cooling cost, corrodes steel deck, and spreads outward every season. Catching it while it is a few hundred square feet is the difference between a targeted repair and a full tear-off.
Planning a commercial roof project?
Assessment, condition report, and a phased budget you can take to ownership. Fully insured crews, 5-year workmanship warranty.