Commercial Roof Leak Detection in Metairie, LA

Because on a flat roof the water rarely enters directly above the stain. It gets in at a seam, a fastener, a curb or a drain, then runs across the deck or sideways inside the insulation and comes through at the first joint or low point it reaches. Repairing above the stain is how a building gets repaired three times in a year with the leak still running.

That is the usual reason people call for a survey, and it is rarely a sequence of bad repairs. It is normally one breach that was never located plus wet insulation nobody measured, so each repair was aimed at the symptom. A survey finds the entry point and maps how far the water has already travelled, which is the fact that decides what the real fix is.

Up to four, chosen from the roof rather than in advance. Infrared thermography reads the heat wet material holds after sunset. A capacitance meter reads the change in dielectric constant that moisture causes below the membrane. Electronic leak detection finds the electrical path a breach opens between a wetted surface and the deck. A controlled flood test suits some sound decks. Usually two are combined.

Because of what it measures. Wet material holds the day's heat longer than the dry material beside it, and the scan reads that difference as the roof gives its heat back after sunset. It needs a sunny day, a clear dry evening and a dry surface. A scan run in the wrong conditions can produce a clean looking image on a roof that is soaking.

Yes, several. Ballasted roofs, roofs that are wet on the surface, heavily reflective coatings that flatten the thermal signal, and overcast conditions that stop the roof shedding heat cleanly. That is precisely why a survey is not a single instrument, and why every anomaly is confirmed on foot before it is drawn on a plan.

A roof plan with the wet areas outlined and the suspected entry points marked, photographs tied to those locations, and a scope priced against the map. It is a document you can hand to a contractor, a consultant or an owner and get comparable answers from, and it is the baseline for comparing against the next survey.

Mostly by ruling options out. Isolated wet areas can be cut out and replaced within a repair. Widespread saturation rules out a coating and a recover, because both would seal the water in, which usually leaves a full replacement. Moisture is not the only factor in that decision, but it is the one most often unmeasured.

Not usually. The scan methods are non destructive. A small test cut is sometimes taken to confirm what a scan is reading and to see the layer build up, and it is patched immediately. On a roof heading for a re-roof decision that cut is worth taking, because the layer count also decides whether a recover is even permitted.

No. A survey is a diagnostic visit rather than construction, so Jefferson Parish requires no permit for the visit itself. Permits become relevant only if the survey leads to work, and a commercial replacement is a plan scoped permit under the 2021 International Building Code with architect or engineer stamped plans.

Yes, and before the price is settled. A walked inspection tells you what the roof looks like; a moisture survey tells you how much of the assembly is already wet, which is the difference between inheriting a roof with years left and inheriting a replacement. On a large flat roof that is one of the biggest single numbers in the deal.