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The roofing library · 11 documents · newest first
Field references for reading a roof after severe weather — hail sizing, damage identification and the public weather records behind a date of loss.
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The Effects of Hail on Metal Roofing Systems — 29th RCI International Convention and Trade Show (March 20–25, 2014) — Jim D. Koontz, RRC, PE and Troy L. White, PE, Jim D. Koontz & Associates, Inc., 2014.
29th RCI29th RCI International Convention and Trade Show (March 20–25, 2014) — Jim D. Koontz, RRC, PE and Troy L. White, PE, Jim D. Koontz & Associates, Inc. · 2014
Hail: Sizing It Up! — Vickie Crenshaw and Jim D. Koontz; publication venue [NF] — RCI Interface c. 2002 [inference], 2002.
Vickie Crenshaw andVickie Crenshaw and Jim D. Koontz; publication venue [NF] — RCI Interface c. 2002 [inference] · 2002
A 2025 forensic engineering paper on separating genuine wind damage on residential roofs from installation defects, mechanical damage and age-related deterioration, aimed at making wind assessments repeatable rather than impressionistic.
NAFEJournal of the National Academy of Forensic Engineers — Azzi · 2025
The full 118-page workbook for Haag's residential roof inspector certification: hail formation and indications, wind characteristics, impact and wind testing, weather data sources, and repair-versus-replacement cost analysis. This is the training most carrier inspectors carry.
HaagHaag Education · 2023
Forensic engineers' methods for dating hail damage on a building that has seen several storms — weathering of the impact site, oxidation, surrounding surfaces and storm data — which is exactly the question behind a carrier's "this predates your policy" denial.
NelsonASCE Forensic Engineering 9th Congress (2022) — Verhulst, Bosley and Donaldson, Nelson Forensics · 2022
A forensic laboratory paper arguing that examining interply bitumen in built-up and modified-bitumen membrane samples reveals hail impact distress that surface inspection and standard delamination testing miss. Relevant to commercial low-slope hail disputes.
NelsonASCE Forensic Engineering 9th Congress (2022) — Donaldson, DeLeon and Simpson, Nelson Forensics · 2022
State Farm's public-facing brochure showing homeowners what hail damage to composition shingles looks like versus weathering, blistering, foot traffic and manufacturing defects. It is also what a State Farm adjuster's damage vocabulary is built on.
State FarmState Farm Mutual Automobile Insurance Company · 2014
A roof consultant's field guide to spotting deliberately fabricated hail damage — hammer strikes, dime-spinning, mandrel punctures — by what real ice cannot do to mineral granules, and by checking the peripheral surfaces a genuine storm always marks.
RCIInterface (RCI, Inc.) — Lyle D. Hogan, PE, RRC, FRCI · 2013
Reports the second RICOWI hailstorm investigation, in which seven teams inspected more than 100 roof systems after the May 24, 2011 Dallas/Fort Worth storm to document how different roofing products — including impact-resistant products — performed against substantiated hail sizes.
RCIInterface (RCI, Inc.), excerpted with permission from RICOWI — Herzog · 2012
A six-year field study of 729 residential hail-strike inspections by EES Group, correlating bruise counts against hailstone size, roof pitch and the elevation's orientation to the incoming storm. Useful when arguing why one slope shows damage and another does not.
RCIInterface (RCI, Inc.) — Petty and Kasberg, EES Group, Inc. · 2009
Engineers from Nelson Architectural Engineers set out a repeatable method for assessing hail damage on residential and commercial shingle roofs, covering the parameters that drive severity — age, material, hail size, impact angle — and how to document them.
NelsonNelson Architectural Engineers, Inc. (ASCE) — East, Lozos, Verhulst, DeLeon and Ahuja
