Measurements in fire resistance tests of materials face two main difficulties: the harsh environment and the lack of spatial resolution of thermocouples (TCs). This paper presents a way to overcome these problems by using an infrared (IR) camera to study the exposed side of composite plates exposed to fire. A method to minimize the flame effect was developed, resulting in surface temperature maps. Errors in temperatures were studied, and results were compared to those of TC. It was found that the IR method provides better results, not only due to spatial resolution but also because of the non-intrusive nature of IR thermography, as opposed to the local effects caused by TCs.