Today, photogrammetry has changed radically compared to what we knew just a few years ago, thanks mainly to technological advances. The appearance of unmanned aerial vehicles (UAV) or drones in the world of topography, and therefore photogrammetry, has meant that this technique has evolved greatly.

Current demands in the construction field are increasing, with projections of achieving energy efficiency. Buildings with almost zero energy consumption are the commitment of the European Union, it is a quite ambitious task to fulfill due to the age of the buildings in Spain. All new construction buildings have to adapt to energy saving regulations and one of the fundamental parameters of this standard is insulation. In the next article we will talk about them.