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For this project, Unitura delivered both a green facade and bat roost features for the Leystromen office building. The green facades were installed on the external elevations as well as within the courtyard, creating a connected network of greenery around the building. The bat roost feature (VMPM) was integrated into the facade, providing a functional roosting opportunity for bats. The bat box mounted on the pole shown in the image was not supplied by Unitura.
Two climbing flowering plants were chosen for the facade planting at the Leystromen biodiverse green facade: Lonicera periclymenum (wild honeysuckle) and Wisteria sinensis (wisteria). Both species are guided in their climbing behavior through the Climbers stainless steel climbing aid system, which consists of a grid of vertical and horizontal tension wires. This system enables controlled and sustainable greening of different facade surfaces.
The diversity of facade orientations plays a key role in the ecological value of this green facade project. South-facing facades receive the greatest amount of sunlight and act as thermal hotspots for insects such as wild bees and butterflies. These facades warm up more quickly in spring, encouraging early-season foraging activity. On the south-facing elevations, the wisteria performs particularly well, producing abundant flowering displays that significantly increase nectar availability and pollinator visits.
North-facing facades, by contrast, create a cool and moisture-rich microclimate. Here, shade-tolerant honeysuckle thrives, while providing habitat opportunities for beetles, woodlice, mosses and moths. This variation in environmental conditions creates a range of ecological niches for different species groups, contributing to the functional biodiversity of the site.
When sufficiently dense and structurally diverse, green facades can provide surprisingly valuable habitat for shrub-nesting birds. Facade orientation plays an important role in this regard. East- and north-facing facades offer greater shelter from wind exposure and excessive heat, creating favourable conditions during the breeding season. In addition, shaded facades often retain their foliage cover and moisture levels for longer periods, resulting in a denser vegetation structure, exactly the type of habitat preferred by many shrub-nesting bird species.
At Unitura, we work together with Vogelbescherming Nederland to improve habitat opportunities for these species through the use of our green infrastructure solutions. By carefully considering plant selection, facade orientation and vegetation structure, we help restore breeding habitats in locations where they are under the greatest pressure. In this way, green facades can contribute not only to biodiversity enhancement, but also to the long-term recovery of bird populations in the built environment.
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