Independent forensic investigation of roof failures — wind damage, structural distress, drainage failure, and collapse analysis.
Roof failure forensic investigation determines the cause of roof collapse, structural distress, or water intrusion — through wind analysis, structural evaluation, drainage assessment, and material testing. PE-stamped reports support insurance claims and litigation.
Wind Uplift
Negative wind pressure on roofs exceeds the capacity of fasteners, decking, and connections — causing progressive peeling or sudden blow-off during storms.
Ponding Water
Inadequate drainage allows water accumulation, adding dead load that deflects the structure, creating deeper ponds — a progressive failure cycle on low-slope roofs.
Snow & Ice Loading
Accumulated snow and ice exceed design loads, especially on older structures or areas with drifting — causing deflection, connection failure, or collapse.
Structural Degradation
Corroded fasteners, rotted decking, or deteriorated structural members reduce roof capacity below design levels over time.
Construction Defects
Missing fasteners, inadequate deck thickness, insufficient connections, or deviation from engineered plans during installation.
Design Deficiency
Undersized structural members, inadequate wind uplift resistance, or failure to account for ponding loads in the original design.
Site survey and photographic documentation of roof damage, including aerial or drone inspection when needed.
Wind damage analysis — evaluating damage patterns, fastener failure modes, and correlation with recorded wind speeds.
Structural evaluation — assessing roof framing, decking, and connections for capacity and code compliance.
Drainage assessment — evaluating roof slope, drain capacity, scupper sizing, and ponding potential.
Material inspection — evaluating roofing membrane, decking, fasteners, and structural members.
Construction document review — comparing as-built conditions to engineered plans and code requirements.
Weather data correlation — comparing observed damage to recorded wind, rain, and snow events.
PE-stamped report with causation, significance, and repair recommendations.
Damage Pattern
Progressive peeling from edges, fastener pull-out patterns, and directional damage indicate wind uplift forces.
Ponding Evidence
Water staining, deflected decking, and drain blockage evidence indicate drainage failure and ponding overload.
Connection Failures
Fractured clips, pulled fasteners, and separated deck-to-structure connections reveal the failure mechanism and load path.
Material Deterioration
Corroded fasteners, rotted decking, and degraded membrane indicate pre-existing conditions that reduced capacity.
Structural Distress
Deflected or fractured rafters, joists, or beams indicate loading beyond capacity — requiring structural analysis.
✗ If the roof leaked during a storm, the storm caused the damage.
✓ Storms can reveal pre-existing deficiencies — inadequate flashing, deteriorated membrane, or poor installation. Investigation determines whether the storm caused the damage or exposed existing conditions.
✗ Roof collapses are always caused by snow or wind.
✓ Collapses can result from ponding water, structural deterioration, construction defects, design deficiencies, or overloading — in addition to snow and wind. Investigation determines the actual cause.
✗ A new roof won't fail.
✓ Even new roofs can fail if improperly designed or installed — inadequate fastening, insufficient slope, or poor detailing. Investigation compares as-built conditions to code requirements and manufacturer specifications.
PE-stamped forensic report with roof failure causation
Wind damage analysis with weather data correlation
Structural evaluation of roof framing and connections
Drainage and ponding assessment
Material condition assessment
Repair scope and methodology recommendations
Differentiation of storm damage vs. pre-existing conditions
Roof failures cause business interruption, inventory damage, and tenant displacement. For commercial property owners, an independent investigation provides the documentation needed for insurance claims, construction defect litigation, and capital planning. PE-stamped reports carry the authority contractors' estimates cannot.
Roof failure cases involve claims against designers, contractors, manufacturers, and insurers. Key considerations: differentiating design deficiency, construction defect, material failure, and storm damage. Wind analysis, structural evaluation, and as-built comparison provide the evidence for responsibility allocation.
Roof claims require distinguishing storm-caused damage (typically covered) from deterioration, wear, and construction defect (typically excluded). Our PE-stamped reports provide the causation analysis carriers and policyholders need — supported by damage pattern analysis and weather data correlation.
Independent engineering answers about roof failure
Yes, through damage pattern analysis, weather data correlation, and material condition evaluation. Fresh damage with sharp edges and clean fractures is distinguishable from weathered, pre-existing deterioration.
Inadequate drainage on low-slope roofs allows water accumulation. The water weight deflects the structure, creating deeper ponds — a progressive cycle that can lead to collapse. Investigation evaluates drain capacity, slope, and structural stiffness.
Yes, by evaluating fastener patterns, deck type and thickness, membrane attachment, and connection details against ASCE 7 wind load requirements for the building's exposure and wind zone.
Discuss your commercial, industrial, insurance, or litigation-related engineering matter with an independent forensic engineer. All consultations are confidential.