Heat-based methods are techniques used in various fields, including material science and engineering, to manipulate materials through the application of heat. These methods can involve processes like annealing, where materials are heated to alter their properties, or soldering, which uses heat to join metals. The controlled application of heat can lead to changes in structure, strength, and other physical properties of materials. In the context of thermography, heat-based methods are also employed for non-destructive testing. This technique uses infrared cameras to detect temperature variations on surfaces, helping identify issues like insulation failures or moisture intrusion. By analyzing heat patterns, professionals can assess the condition of structures without causing damage.