What a Commercial Roof Inspection Covers
Membrane field: We walk the full field in a grid pattern, not just the perimeter. Field blisters, ridging over insulation joints, and ponding patterns are documented with photos and location callouts on the zone diagram. Membrane type, approximate age, and visible deterioration are recorded at the start of the report.
Flashings and terminations: Parapet cap flashings, edge metal, pitch pockets, pipe boot flashings, curb flashings, and any other termination detail get probed individually. Flashings fail before membrane fields on most aged roofs, we do not skip them or summarize them as 'generally fair condition.'
Drains and drainage: Every roof drain, scupper, and overflow is inspected and photographed. Clogged drains are documented by location. Improper positive drainage, flat or back-sloped areas that pond standing water, is flagged, measured, and recommended for correction.
Moisture Core Sampling
Surface inspection alone cannot determine whether insulation under an intact-looking membrane has absorbed water. Wet insulation does not dry out, it keeps absorbing water cycle after cycle, grows mold, and loses R-value. On any roof where we see surface evidence suggesting subsurface saturation, blistering, spongy feel underfoot, drain-area discoloration, we pull moisture cores.
A moisture core is a three-inch diameter plug cut through the membrane and insulation. We extract it, measure it, photograph it, and patch the cut-out before we leave the roof. Core results are logged by location on the zone diagram. If more than 25% of cores read saturated, the recover-versus-replace decision tips toward replacement, recovering wet insulation traps moisture and voids any new warranty.
For St Louis buildings with a freeze-thaw history, core sampling in late fall or early spring is particularly useful, wet insulation near the surface shows the damage from the prior ice season before the summer heat masks it.
The Inspection Report Format
Every inspection we deliver includes: an executive summary with overall condition rating and recommended priority actions; a photo-keyed zone diagram showing all documented anomalies by location; a line-item condition log for membrane field, flashings, drains, and penetrations; moisture core results if cores were pulled; and a recommended action list with three categories, immediate, within 12 months, and capital-planning horizon.
The capital-planning horizon section is built for the facilities managers and asset managers at the St Louis firms and healthcare systems we support. They need to know not just what is wrong today but what the roof's trajectory looks like over the next three to seven years, so they can plan the capital event appropriately. We write to that use case, not to the minimum that gets a contractor through the door.
Reports are delivered as PDFs within five business days of the inspection. For portfolio clients with multiple St Louis buildings, we produce a summary matrix across all buildings so the asset manager has a side-by-side condition view.
Annual Inspection Programs
Manufacturer warranties on TPO, EPDM, and PVC systems typically require documented annual inspections to remain valid. We can structure annual inspection schedules for commercial roof clients across the St Louis metro, Clayton, Chesterfield, Downtown, Maryland Heights, and the other municipalities where our scheduled roof work are concentrated.
Annual programs include the full inspection documented above, plus a comparison against the prior year's report to flag any conditions that have advanced. Drain clearing is included in every annual visit. owners using annual inspection programs get priority scheduling when emergency leak response is needed.
Inspection Documentation for St. Louis Property Transactions and Insurance
St. Louis commercial property transactions regularly include roof condition reports as a component of buyer due diligence. The Gateway Arch metropolitan area's active investment market produces frequent commercial acquisitions where buyers request roof documentation before closing. We produce inspection reports specifically formatted for transaction use: a one-page executive summary with current condition assessment, items requiring near-term attention, and capital event projection timeline, supported by the full zone-keyed photo documentation.
After Missouri's periodic severe weather events, post-storm inspection reports serve a dual purpose: they document the storm damage for insurance claim support and establish the pre-repair condition that the adjuster's review requires. We structure post-storm inspection reports with the insurance documentation function explicitly in mind, separating storm-caused damage from pre-existing conditions in both the written description and the photo captions.
