What kind of walls can Cinside sensors see through?

All types of building materials have different properties, and they all effect the signal in different ways. In general, a dense and thick wall damps the signal more, and the range decreases.
A homogeneous metal plate, eg a white board or metal roof is impossible to penetrate with the energies we are using. Metal reinforcements in concrete walls degrade performance, but as long there are gaps in between bars it is possible.