water supply and green roofs
All buildings have a sedum tile roof that forms
part of the climate and surface water management
systems. With its plants the sedum tile roof also
contributes to biological diversity by serving as
a habitat for birds and insects.
The sedum tile roof collects approximately 50 percent
of all rainwater that falls there while the balance
is lead to the area's "water garden". It is also
part of the cooling system because as the rainwater
evaporates the roof temperature drops causing the
indoor temperature to fall. Furthermore, the service
life of the underlying roofing paper is doubled
because of the protection provided by the sedum
GRASS INSTEAD OF ASPHALT
Asphalt, which is commonly used in facilities of
this type, has essentially been replaced by gravel,
concrete pavement tiles or reinforced grass, i.e.
flagstones with openings where grass can grow. This
means that rainwater drains in a natural way and
does not affect the balance of water in the area.
GARDEN" RESERV O I R
Surrounding the entire facility are creeks that
collect and purify surface water. The streams lead
to the facility's "water garden" which levels out
the water flow and allows natural purification to
occur. The design of the surface water handling
system means that run-off is the same as before
development and that no water is drained via the
public surface water network.