Construction Defect Expert Witnesses: CPVC, Piping & Building Materials

A common misconception is that it is best to use lots of solvent cement to ensure that joints are strong. What is not well-known is that solvent cement contains chemicals that are not compatible with CPVC and that excessive application of solvent cement actually weakens the pipe and shortens the service life of the piping system. This why it is critical to use only enough cement to form a good joint without adding excessive amounts that form puddles of cement inside the joints and cement drips running down the inside of pipes. We have proven using ASTM chemical compatibility testing that excess cement weakens pipe and can cause ESC failure of a piping system. In reality, the most common cause of CPVC failures is environmental stress cracking (ESC) from chemical incompatibility with other building materials. Excessive overuse of cement weakens the piping making the pipe more susceptible to ESC failure.

Predicting remaining useful life after chemical exposure involves many variables — the type and concentration of the chemical, the intimacy of contact, the stress level in the pipe, ambient temperature, and exposure duration. Our experts use laboratory testing and field assessment data to provide evidence-based estimates, but each case requires individual analysis.

This is one of the most common dynamics in construction defect litigation. Our forensic methodology can differentiate between manufacturing defects (knit lines, dimensional non-conformance, etc), design deficiencies (stress concentrations, material selection errors), and installation errors (improper joint assembly, over-tightened hangers). SEM fracture analysis and FTIR chemical fingerprinting provide objective, scientific evidence which stands up to scientific scrutiny.

Plastics forensic science is a specialized discipline. General construction experts and metallurgists lack the polymer science training to interpret SEM fracture surfaces, understand ESC mechanisms, or identify antioxidant depletion in PEX pipe. Courts increasingly recognize that plastic failure analysis requires experts with specific credentials in polymer science and materials engineering.

An upper-floor pipe break that floods multiple floors below — causing cascading water damage to units, common areas, and building systems. In high-rise condominiums, a single CPVC failure can result in millions of dollars in property damage and displacement of dozens of residents. When the first failure occurs, it often indicates systemic vulnerability throughout the building. We routinely perform statistical sampling of piping systems in large highrise condominiums to develop the most cost effective remediation plan to restore the building to a reliable condition.

Many building owners address only the immediate leak without investigating whether the root cause affects other pipes in the system. A comprehensive piping system assessment using borescope cameras and non-destructive testing can identify at-risk areas before they fail, preventing far more costly emergency repairs.