LJB’s experienced forensic professionals perform building components failure analysis, root cause assessment, and assessment of damages in accordance with the standards set forth by all code and standards agencies*. If a building has been constructed with faulty components, water intrusion begins, eventually causing permanent damage.

Forensic testing is the most accurate method of assessing a building’s potential deficiencies. Our extensive list of services offers a comprehensive approach to assessing the root cause of failing buildings’ system components. Our research culminates in a comprehensive report, list of repair recommendations, and budget summaries.

If your dispute cannot be settled out of court, LJB’s forensics professionals can be available to join your legal team as expert witnesses should you require representation in a courtroom appearance or in depositions.

LJB has extensive experience addressing leaks, cracking walls and foundations, mold growth, dry rot, all types of water damage, efflorescence deposits, and all construction and design defects.

Our forensic expertise includes, but is not limited to:

  • Wind Uplift Testing
  • Moisture Surveys (infrared and capacitance)
  • Withdrawal Resistance of Roofing Fasteners
  • Adhesion Pull Tests
  • Laboratory Analysis of Roof Samples

LJB’s forensics team is fully prepared to execute rigorous test procedures at each step of the analytical process. All test procedures are precisely documented at each stage of execution and are performed in strict accordance with ASTM Standards, UL and ULC Standards, FM Global Standards, and any other applicable code or standard agencies.


*Our Forensic Testing includes, but is not limited to:

  • AAMA

Field Testing of Fenestration Products, AAMA 502-08


Withdrawal Resistance of Roofing Fasteners, ANSI-SPRI FX-1

  • ASTM International
  • Standard Practice for Location of Wet Insulation in Roofing Systems Using Infrared Imaging, ASTM Standard C-1153-97 (2003)
  • Standard Test Method for Softening Point of Bitumen (Ring and Ball Apparatus), ASTM Standard D36-06
  • Standard Practice for Sampling and Analysis of Existing Built-Up Roof Systems, ASTM Standard D2829-07
  • Standard Test Method for Total Energy Impact of Plastic Films by Dart Drop, ASTM Standard D4272-03
  • Standard Test Method for Dynamic Puncture Resistance of Roofing Membrane Specimens, ASTM Standard 5635M-11
  • Standard Practice for Quality Assurance Observation of Roof Construction and Repair, ASTM Standard D7186-05
  • Standard Test Method for Field Testing Uplift Resistance of Adhered Membrane Roofing Systems, ASTM Standard E907-97 (2004)
  • FM Global Property Loss Prevention

Field Verification of Roof Wind Uplift Resistance, Data Sheet 1-52