Expert Investigations
Fire Origin & Cause Investigation
Certified fire investigators determining the origin, cause, and circumstances of fires across every setting. Defensible findings for insurance, legal, and corporate clients.
What We Do
Determining How and Why Fires Start
ClearLine Forensics provides fire origin and cause investigations across residential, commercial, vehicle, and industrial settings. Our certified investigators apply NFPA 921 methodology to deliver clear, defensible findings.
We work with insurance carriers, attorneys, property owners, and manufacturers to answer the critical questions: where did the fire start, what caused it, and what factors contributed to its spread.
Specializations
Types of Fire Investigations
Most Common
Residential Fire Investigation
Single-family homes, apartments, and condominiums. Our most frequently requested service, covering electrical failures, appliance fires, cooking incidents, and heating equipment malfunctions.
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Commercial
Office buildings, retail, warehouses, and restaurants.
Industrial
Manufacturing facilities, plants, and processing centers.
Vehicle
Cars, trucks, fleet vehicles, and electric vehicles.
Heavy Equipment
Construction, mining, agricultural, and industrial machinery.
Aviation & Marine
Aircraft, helicopters, boats, and commercial vessels.
Solar Installation
Rooftop systems, ground-mounted arrays, and inverters.
Standards-Based Approach
NFPA 921: The Scientific Method Applied to Fire Investigation
Every ClearLine fire investigation follows NFPA 921, the nationally recognized guide for fire and explosion investigations published by the National Fire Protection Association. This standard requires investigators to apply the scientific method: collecting data, developing hypotheses, and testing those hypotheses against the physical evidence before reaching a conclusion.
This methodology is critical because fire investigation conclusions must withstand cross-examination in depositions and trial testimony. Opinions not grounded in NFPA 921 are increasingly challenged and excluded by courts. Our adherence to this standard protects the reliability and admissibility of our findings.
Origin Determination
Systematic analysis of fire patterns, witness accounts, and physical evidence to identify where the fire started.
Cause Analysis
Evaluation of ignition sources, first fuels, and circumstances to determine what caused the fire.
Fire Spread Modeling
Assessment of ventilation, fuel loads, and compartment dynamics that influenced fire behavior.
Evidence Collection
Documentation and preservation of physical evidence following chain-of-custody protocols.
Methodology
Our Investigation Process
Initial Assessment
Review available information, coordinate with stakeholders, and develop an investigation plan.
Scene Examination
Conduct thorough on-site examination following NFPA 921 methodology, documenting evidence and fire patterns.
Analysis & Testing
Analyze collected data using forensic methodologies. Conduct laboratory testing of evidence as needed.
Reporting
Deliver a clear, defensible report with findings and conclusions for legal, insurance, and technical audiences.
Industries & Clients
Who Needs a Fire Investigator?
Fire origin and cause investigations are retained when the cause of a fire is disputed, unclear, or when a third party may be responsible. Our clients need independent findings they can rely on for claims decisions, litigation strategy, or regulatory compliance.
- Insurance carriers investigating fire loss claims
- Attorneys pursuing or defending subrogation actions
- Property owners seeking independent cause determination
- Product manufacturers responding to fire-related claims
- Government agencies and fire marshals needing expert support
- Fleet operators and equipment owners after vehicle or machinery fires
Real Results
Case Studies
Residential Fire Investigation
Determined the origin and cause of a residential garage fire, ruling out recently serviced appliances and identifying an improperly routed extension cord as the ignition source.
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Roof Deterioration Damage
Distinguished storm-related impacts from pre-existing deterioration using material analysis, satellite imagery, and weather data correlation.
Read Case Study →Common Questions
FAQ
What is fire origin and cause investigation?
It is a systematic examination of a fire scene to determine where the fire started (origin) and what ignited it (cause). Investigators apply scientific methodology to analyze fire patterns, physical evidence, and witness information to reach defensible conclusions.
How soon after a fire should an investigator be retained?
As soon as possible. Fire scenes are altered quickly by weather, demolition, and cleanup activities. Early engagement allows the investigator to examine the scene while evidence is still intact and accessible.
What is NFPA 921?
NFPA 921 is the Guide for Fire and Explosion Investigations, published by the National Fire Protection Association. It is the recognized standard of care for fire investigation methodology in the United States, and courts increasingly require that expert opinions be consistent with its principles.
Can you determine if a fire was intentionally set?
Yes. Our investigators classify fire causes as accidental, natural, incendiary (intentional), or undetermined. When evidence indicates an intentional fire, we document our findings and coordinate with our client. We do not conduct criminal investigations, but our findings may support law enforcement efforts.
Do you provide expert witness testimony?
Yes. Our engineers and certified fire investigators regularly provide deposition and trial testimony. Our reports are prepared with litigation support in mind, using clear language and visual documentation that communicates effectively to non-technical audiences.
Get in Touch for Origin & Cause
Our certified fire investigators provide independent, defensible findings for legal, insurance, and corporate clients.