Epoxy coatings provide excellent physical barrier to the steel reinforcing bars that are embedded in reinforced concrete and prevent chloride ions from reaching the bar surface under corrosive environment. Such protection primarily depends on the integrity of the coatings, which can often be damaged during construction. Repair of epoxy coatings can be time consuming and expensive. Therefore, it is important to determine a critical amount of damage that can be tolerated without compromising the capacity of the coatings to provide corrosion protection.
For decades, waterproofing has been a major concern and a widely researched topic by building scientists and forensic engineers. Elastomeric coatings have been broadly used in different applications since the early 1950s. Manufacturer’s recommendations for the proper application of elastomeric coatings are often based on laboratory conditions (75oF and 50% RH) rather than extreme conditions posed by the real world. This study examines the failure of elastomeric roof coating exposed to conditions of high temperature (150°F) and water pooling caused by precipitation.