An overview of the damages, which can be detected by thermography in road and bridge paving, is given. Emphasis is placed on the detection of blisters in waterproofing membranes and bridge decks, as those disturb the heat flow. This system may be used both during construction and after deployment. Data collected during the construction (such as temperature of mixture during paving, temperature of the underground or temperature during flame up of waterproofing membranes) influence the quality of the building, suggesting the addition of thermograms to the building documentation. Some challenges in the analysis of thermograms due to patching on the roads are exposed and possible evaluation tools are presented. The currently utilized thermography is a passive system with seasonal and weather employment limitations; preliminary results of a test to assess the use of microwaves as heat source are presented.