Effective moisture control is essential for extending the service life and maintaining the performance of low-slope commercial roofing systems. While traditional vapor retarders and air barriers help reduce air leakage, we will discuss newer technologies that offer more adaptive solutions that align with today’s roof performance demands. This paper explores the next generation of moisture management, permeable vapor retarders and air barriers, and their role in mitigating moisture intrusion, improving energy efficiency, and enhancing wind uplift resistance. Readers will examine the science behind condensation and its often-overlooked consequences, including material degradation, reduced thermal performance, and premature roof failures driven by uncontrolled moisture-laden air movement. Through current research and real-world case studies, this paper highlights how strategic design and installation of these advanced materials can significantly increase roof resilience, extend system longevity, and reduce long-term operational costs—ultimately offering better protection for the entire building envelope.

Residential roofs without attics are typically inspected for leaks by installing scaffolding and probing the ceiling for water intrusion with a moisture meter. This paper discusses infrared thermography’s ability to probe the ceiling for water intrusion without physical contact with the ceiling. Water was applied to the roof in a controlled manner, starting at the lower sections, then moving to the peak of the roof. During the water application, continuous scanning of the ceiling with a FLIR E4 infrared camera allowed instant discovery of the water intrusion.

A certain class of building defects continues to plague the construction industry, despite a variety of defensive techniques put in place to prevent them.  The defects occur when a nail or screw comes into contact with a copper pipe or penetrates a plastic pipe carrying fluids.  If these defects are not caught during construction, they can turn into leaks that can go undetected for years.  The resulting leaks can result in mold growth, dry rot, or even structural damage in extreme cases. Contractors in California have a ten-year liability window for these types of defects.  Finding cost-effective ways to eliminate these defects during construction can lower builders’ overall warranty costs and improve overall customer satisfaction.

Infrared imagers have become vital diagnostic tools in building maintenance, with mold-related health issues becoming more prevalent. Although infrared imagers do not detect the presence of mold, they can be used to detect the presence of moisture by means of variances in conductive and phase change heat loss or gain. When commissioning new building envelopes or carrying out building condition inspections of existing building envelopes, it is imperative to differentiate the source of the moisture accumulation between interior or exterior sources, since remedial actions will vary considerably. Moisture detection methodologies for interior and exterior inspections vary, and equipment specifications are different for both types of inspections. The physical mechanisms that produce moisture patterning in the infrared wavelengths are different for both interior and exterior inspections. Ensuring optimal inspection ambient conditions is paramount to obtaining accurate inspection results. This paper will discuss the various types of thermal patterns created by surface penetration of water versus those patterns created by air leakage from the building interior in cold winter conditions. Moisture detection methodologies for interior inspections will be discussed, and the importance of timing will be stressed regarding the detection of moisture within assemblies by non-destructive means. Various types of exterior building envelopes will be discussed along with their performance characteristics and how these affect thermal patterns during various inspection procedures.