Vertical Greenery Systems (VGS) are promising contemporary Green Infrastructure which contribute to
the provision of several ecosystem services both at building and urban scales Among others, the building
acoustic insulation and the urban noise reduction could be considered Traditionally vegetation has been
used to acoustically insulate urban areas, especially from the traffic noise Now, with the introduction of
vegetation in buildings, through the VGS, it is necessary to provide experimental data on its operation as
acoustic insulation tool in the built environment. In this study the acoustic insulation capacity of two VGS
was conducted through in situ measurements according to the UNE-EN ISO 140-5 standard. From the
results, it was observed that a thin layer of vegetation (20–30 cm) was able to provide an increase in
the sound insulation of 1 dB for traffic noise (in both cases, Green Wall and Green Facade), and an insulation
increase between 2 dB (Green Wall) and 3 dB (Green Facade) for a pink noise. In addition to the
vegetation contribution to sound insulation, the influence of other factors such as the mass factor (thickness,
density and composition of the substrate layer) and type of modular unit of cultivation, the impenetrability
(sealing joints between modules) and structural insulation (support structure) must be taken
into account for further studies.