Fire Damage Assessment Protocol
Structural clearance and authority coordination: We do not enter a fire-damaged building or access the roof until we have written confirmation that structural entry is safe. In St Louis city, that clearance comes from the St Louis Building Division following Fire Department inspection. In St Louis County municipalities, the process runs through each jurisdiction's building department. We coordinate with the relevant authority and do not create urgency pressure on that process.
Deck assessment: Once clearance is granted, we assess the deck from the roof surface. Burned or heat-warped metal deck is immediately visible. Partially compromised deck requires pull-testing and, in some cases, structural engineering review before any load, including repair crews and materials, is placed on it. We document deck condition with photographs and pull-test results before proceeding with any further work.
Insulation and membrane removal in damaged zones: Fire-affected insulation must be removed. It is thermally compromised, often partially melted, and cannot be recovered under any new membrane. We remove the full fire-affected zone plus a margin established by visual inspection and cut-probe to confirm the boundary of undamaged insulation.
Heat-Affected Zone Beyond the Visible Burn Area
The heat-affected zone extends two to four times the direct burn radius depending on the intensity and duration of the fire. TPO membrane in the heat-affected zone loses its plasticizers at elevated temperatures and becomes brittle. It may look intact on the day of inspection but will fail under the first temperature swing as it enters St Louis winter. Seam welds in the heat-affected zone are thermally disrupted. The weld bond is degraded even if the seam appears closed on visual inspection.
EPDM in the heat-affected zone shows visible surface cracking when heat exposure exceeds the membrane's temperature tolerance. Modified bitumen softens at elevated temperatures and rehardened in a blistered, delaminated state. We inspect the full heat-affected zone with a probe after documenting the direct burn area, and we include the heat-affected zone membrane in the replacement scope when probe testing confirms adhesion failure or brittleness that will not survive a St Louis winter's freeze-thaw cycling.
Repair Scope for Fire-Damaged Commercial Roofs
Deck repair or replacement: Structurally compromised deck sections are replaced in coordination with the building's structural engineer. New deck panels are installed to span the existing structural members and fastened per the manufacturer's specification. We do not over-specify this work. The deck replacement scope is based on documented structural assessment, not visual appearance.
Insulation replacement: New insulation is installed over the repaired deck to the current energy-code R-value. In St Louis, that means a polyiso primary board plus cover board stack designed to the current Missouri energy code. Tapered insulation is reconfigured around existing drains if the fire zone affected the drainage pattern.
Membrane replacement: New membrane is installed over the repaired insulation and integrated into the existing system at the perimeter of the fire-damage zone. The integration point is the most technically demanding part of the repair. The new membrane must be fully welded to the existing membrane at a seam that will carry manufacturer warranty on both sides. We photograph every integration seam for the closeout documentation.
Kitchen and Restaurant Fire Events in St Louis
Kitchen fires are among the most common commercial fire events in St Louis, concentrated in the restaurant and entertainment corridors in Downtown, Soulard, the Delmar Loop, and the Central West End. Commercial kitchen fires concentrate heat through exhaust systems that penetrate the roof. Heat conducted through the exhaust penetration can compromise deck and insulation over a larger area than the visible char, because the exhaust duct is a direct thermal conductor from the fire below to the roof assembly above.
We assess the full penetration zone plus a surrounding margin on every kitchen fire event, not just the visibly burned area. The exhaust duct itself must be assessed for thermal damage and replaced if the heat event exceeded the duct's rated temperature. The flashing at the roof penetration requires full replacement regardless of visible condition, because the thermal event degrades the flashing sealant and membrane bond in ways that are not apparent until the first post-repair rain event.
Insurance Documentation for Fire-Damaged Roofs
Fire damage claims on commercial buildings in St Louis involve multiple parties: the building's property insurer, any tenant's business interruption insurer, the Fire Department's investigation report, and potentially the building's structural engineer. Our documentation is structured to support all of these parties: photo log with GPS coordinates, written scope by layer, cost estimate broken out by material and labor category, and a narrative that explains the damage mechanism and the repair approach.
We distinguish between fire damage and pre-existing condition. A roof that was already in deteriorated condition before the fire event has pre-existing issues that are not part of the fire claim. An accurate report identifies those clearly. Including deferred maintenance items in the fire damage scope creates liability for the contractor and jeopardizes the claim. Our reports are specific about what the fire caused and what was there before.
For fire events in occupied commercial buildings, we can coordinate repair scheduling to allow re-occupancy of unaffected sections of the building while work proceeds on the fire-damage zone. This is particularly relevant for multi-tenant buildings in the Downtown and Central West End corridors where a restaurant fire can affect only one tenant's space while the rest of the building remains operational.
Re-Occupancy and Permitting After a Commercial Roof Fire
Commercial buildings that have experienced fire events require new or amended building permits for the repair work in St Louis city and county. The permitting process runs through the applicable building department and involves plan review for any structural work and inspection sign-off at specified stages of the roof replacement. We handle permit procurement as part of our standard project administration on fire-damage repair projects.
Partial re-occupancy is possible if the fire-affected zone is isolated from the occupied area and the roof above the occupied area is weathertight and structurally cleared. We work with the building owner's general contractor and the structural engineer to identify which roof sections are cleared for re-occupancy and which require active exclusion. Building department and fire marshal requirements govern re-occupancy timing, and we provide written roof condition documentation to support the occupancy permit application as a standard deliverable.
