Forensic Engineers and Consultants

Blog Posts by: Roger Davis

Author Roger Davis


Expertise Includes:

  • Engine Failures
  • Heavy Equipment Fires
  • Industrial Accident Reconstruction
  • Machine Safeguarding
  • Water and Sewer Utilities

Water Damage from Leaking Shower Stalls


Have you ever had to have a leaking shower pan for a tiled shower stall replaced, only to have a recurrence a few years later? If so, it is likely that it was not properly built and/or repaired. In most installations, the shower stall is constructed with an underlying one-piece flexible membrane of PVC that is attached to the wall studs before the backer board and wall tile is installed. No nails or screws should penetrate the membrane below the level of the curb of the shower stall. The only opening in the membrane below the curb must be the hole for the shower drain to connect to the house plumbing. The shower drain is designed to allow water on top of the membrane to flow into the drain via weep holes for that purpose. Read More

nail gun

Should I Trust My Nail Gun?


Can you imagine framing a house with the tools of our forefathers, using hand saws and hammers, rather than power saws and pneumatic nail guns? Power tools have made the job much easier and faster, that even the amateur is well equipped for this kind of work. Read More


Evolution of Narrow-Aisle Stock Picker Forklifts


As the cost of warehousing has increased over time, material handling equipment has evolved to allow higher density storage capacities. Narrow aisle and order picker forklifts are among the innovations that have evolved over the past 50 years to accommodate this trend. Read More


Are You Prepared for Emergencies? Your Generator Set Should Be!


Emergency generators are often called into service during catastrophic events like hurricanes, floods, tornadoes or fires, but also during more mundane events like thunderstorms and other things that may temporarily interrupt the public power grid. Can you rely on your generator to perform at those critical times? Read More

Corrosion on treated wood deck.

Why Should I be Concerned About Galvanic Corrosion?


It is fairly common knowledge that the use of dissimilar metals in plumbing systems can quickly result in a leak due to a corroded pipe or fitting. Read More


Uninvited House Guests: Mold and Other Fungal Growths


The wet, relatively warm weather recently experienced in the southeast has caused a high incidence of mold and other fungal growth complaints in homes and other structures.  Engineers at Warren Group are often called upon to investigate the cause(s) of these problems. Read More

Fractured Fitting

A pipe burst in a heated building: FREEZE Damage??


Have you ever wondered about the cause of a ruptured pipe inside a structure in the dead of winter, and been puzzled because the pipe burst occurred in a heated area? It may seem counter-intuitive, but the cause may have been due to frozen piping. Read More


Workers Compensation Subrogation Potential: Top 4 Data Needs for Experts


Oftentimes, an insurance adjuster may suspect that the potential exists for a workers compensation claim to be subrogated, but would like a second opinion from an expert before launching a full-blown investigation; alternately, the adjuster may hold the opinion that the subrogation potential is not great, but would like a second opinion for confirmation of his view. Read More

A power buggy fitted with an outrigger for tip-over testing.

Injury on Power Buggy


When an operator is thrown from a ride-on vehicle when it tips over, such as a mud buggy, serious injury or death can result. In one such case I investigated, the issue centered on the maintenance of the vehicle, specifically whether a maladjusted hydrostatic drive caused the braking mechanism to malfunction. Read More

One of the fractured Grade 5 bolts used to secure a concrete truck mixer drum to a drive flange.

Bolted Connection Failures


One of the most common features of machinery, consumer products, and assemblies of any type is the bolted joint. Sometimes the joint fails, with results ranging from inconsequential to catastrophic. The design of a joint is in the purview of an engineer, who must consider the material to be joined, the geometry of the joint, the loads imposed on the joint, the strength of the connectors (i.e., bolts, screws) environmental effects (i.e., temperatures, corrosion) and perhaps other factors. Read More

Type ofLoss

Not sure what you're looking for?
Browse All

Select Loss Category