The application of fibre reinforced polymer (FRP) materials, to retrofit or rehabilitate concrete structures, is dependent on bond strength and integrity. Bond strength is defined by the composition of the epoxy formulation, the condition of the concrete surface, and the bond area. Defects at the concrete surface and poor installation methods have the potential to negatively impact the overall bond strength of the externally applied FRP material. Current inspection methods largely rely on destructive tests and have proven to be inconsistent, overly localized, costly, and require follow-up repair. In contrast, Infrared Thermography (IRT) is a promising technique for non-destructive inspection of FRP when externally bonded to reinforced concrete [1–3]. Previously used IRT methods have largely relied on external heating sources in the form of halogen lights, both steady state and pulsing [3–5]. Halogen lamps produce radiant heat in the form of infrared radiation, which can lack uniformity in heating and may be limited in depth of penetration. In contrast, convective heating methods heat the subsurface to a greater depth with more uniformity. Additionally, measuring the heat loss rather than gain of the top surface materials after heating, can provide advantages in post-analysis techniques. In this study, two new convective heating methods are presented and compared to halogen lights. Thin, polytetrafluoroethylene (i.e., Teflon) defects were intentionally placed within the bond layer during wet layup of carbon fiber reinforced polymer (CFRP) composites to notched concrete prisms and investigated using IRT during the cooling phase after heating prior to mechanical testing.