Leaks stopped. Causes documented. Operations respected.

Single-ply membranes look alike from a ladder, and they are not interchangeable at repair time. TPO and PVC are both hot-air weldable, but not to each other; the chemistries won't fuse. EPDM is a cured rubber that can't be welded at all. Its repairs use compatible primers and pressure-sensitive materials. Modified bitumen takes asphalt-compatible repair work, and metal roofs are a fastener-and-seam discipline of their own. Repairing a membrane with the wrong material creates a patch that fails on its own schedule.

We also look for the sins of the past: previous incompatible repairs: the mystery caulk, the wrong-membrane patch, the roof cement smeared over a single-ply, are among the most common leak sources we find on commercial roofs. Part of a proper repair is removing those, not adding a layer on top.

Not every leak announces its path. When the surface looks intact but the interior says otherwise, the investigation goes into the assembly: core samples physically confirm which layers are wet, infrared scanning reads the thermal signature of saturated insulation after sunset, and electrical capacitance meters detect moisture through the membrane without cutting it.

The distinction matters because wet insulation doesn't dry in place: it degrades R-value, corrodes fasteners and deck from below, and keeps feeding interior moisture long after the entry point is sealed. A repair that fixes the breach but leaves a saturated zone behind is half a repair; we scope the wet-area replacement alongside the patch so you can authorize the whole fix.

In active weather, the first visit is about stopping the water: temporary measures that protect the interior until conditions allow permanent work. Interior protection and tenant coordination are part of that visit, not an afterthought. We'd rather move the pallet than document the loss. The permanent repair follows as manufacturer-compatible work, which matters on warranted roofs where an improper repair can jeopardize coverage.

Everything is documented and authorized: photos of cause and repair, written scope before work proceeds, and an honest read on what the repair means. Repair warranties cover the repair, not the rest of an aging roof, and we say so plainly. When repairs start clustering, that pattern is data: repeated failures across a roof often indicate an assembly-level problem that no individual patch will solve, and the documentation trail is what lets you make that call on evidence instead of frustration.