By guiding a climbing plant upwards and then horizontally on cables or steel mesh, you can create a garland of leaves, a delicate green canopy, or a denser 'roof' of greenery. While individual tension cables are sufficient for garlands, multiple cables are needed when you want to create a green roof.
Grapevines are particularly suitable for green garlands, roofings, pergolas, balconies/canopies, etc.. This type of roof greening needs to be pruned regularly and should always remain airy/well ventilated to avoid mildew formation. For denser, opaque green roofs, go with Dutchman's pipe or wild (grapeless) grapevines.
In the Baroque era of garden art, people began experimenting with hanging vine garlands, or "festoons." Later, after electrification, electric cables in rural areas were often routed through a courtyard and the associated strong tension rope was also used as a holding rope for a vineyard garland. (Farmers have always been enthusiastic about such practical things!) Whether cable and anchoring are suitable for such additional loads must be clarified in each individual case.
Ropes were also often tensioned solely for climbing plants. FassadenGrün designed the system 0040 specifically for tensioning a cable between two buildings as a garland (through that link you can also find information about unusual structural features, etc..).
With several parallel cables, the garlands can provide green canopies, even green roofs, between the walls. You can, of course, combine this suspended greenery with wire rope climbing fields on a facade.
In southern Europe, you'll find ample examples of green garlands hanging in the streets and alleys (in Freiburg / Germany, for example.) Unlike a courtyard greening, permits may be necessary with this type of greening, because it usually includes public road space. The liability for possible damage (for example: torn out tension ropes) should be clarified with the authorities; then nothing stands in the way of a road greening. The greenings will then usually be limited to narrow streets, alleys, and pedestrian zones. They can radically improve the ambience in these pedestrian areas.
Modifcations to system 7060, such that intersecting rope compartments are created, can provide a load-bearing structure for the green roof. Plan the canopy (so, the cables) as high as possible to compensate for the inevitable sagging of the ropes from the weight of the plants. With the highest possible placement, the leaves and shoots will also be able to grow (often in their hanging habit) without disturbing the passageway or the heads underneath.
Points of distribution for the ropes can be placed on separate wooden supports (posts, pillars) as with wire frameworks; these posts must be sufficiently supported- for example, by tensioning cables anchored in the ground (as with cable system 0050) or by a support triangle when needed. If necessary, the posts can be anchored in a nearby wall with short tensioning ropes or stainless steel threaded rods (see photo). Installation in the upper part of the wall is only permitted if the upper bricks are held by a peripheral tie (ring) beam or an overlying heavy concrete roof slab; otherwise, they must be anchored more deeply. A separate permit may be required at property boundaries if customary fence heights are exceeded. If many ropes run from one point, then add rings with screw joints/links. Use cable with a maximum thickness of 3mm so that they can absorb peak loads rather than the support post.
Here, the ropes for grapevines were arranged like the spokes of a wheel to form a green arbour. Sanssouci Palace Park in Potsdam / Brandenburg
Fassadengrün is a commercial supplier of stainless steel wire rope systems in Germany, Europe and overseas. Information about: Which plants are suitable, are climbing aids necessary, should they be made of wood or metal? Here at FassadenGrün you will find all the information you need from a single source.
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