Free-standing walls, wall panels, non load-bearing walls, retaining walls, etc.. do lend themselves to wall greening! The approach to greening will be slightly different than for the classic 'building/facade greening' as such. This begins with the question of whether or not you want to cover the entire wall up to the wall coping, and whether the greenery shall be overhanging, etc.. In this section, we give examples of wall greening, from historical garden walls to modern retaining walls and noise barriers. You can find supplementary information under supporting/retaining walls, rubble (rough stone) masonry, and gabions.
'Self climbers' -- like wild vine and ivy (Boston ivy and English ivy)-- for which climbing aids are unnecessary, are often set on walls. When using these plants, however, it is particularly important that the wall is intact. The cope of the wall must be able to repel and drain all precipitation so that no water can penetrate from above, and all gaps should be closed so that the shoots of the plants mentioned cannot climb their way in. Climbing hydrangea and climbing spindle (winter creeper) are also suitable and less 'aggressive.'
This is the classic type of wall greening! Many plants love the stored warmth of a protective wall in cooler areas of Central Europe. Already in the Baroque era, wall gardens with "talut walls" (free-standing roofed walls) were specially laid out to produce trellis fruits. Alongside wooden trellises, horizontal wires were used; our system 8010 arose out of such arrangements.
Climbing structures are required for almost all plants except for ivy and Boston ivy. The cable systems from FassadenGrün also cover applications on walls, e.g. with the band-like basic forms 8010 and 8020. When necessary, several cable systems (such as 4010, 4020, or those from the 6000 category) are grouped next to each other.
When mounting into natural stone masonry or brick, keep a 20 cm distance from the edges to prevent cracking. For more information, refer to the manual on 'drilling work for climbing aids'. Even in the scope of 25 – 40 cm on such walls, mounting should be done 'expansion-pressure free'-- so, no rawl plugs/dowels. Use mortar instead.
Such walls - most made of concrete or precast concrete elements - are ideal for greening. The installation of cable systems into modern walls is easier than with older walls. The risk of cracking the wall at the cope and edges is reduced, as is the risk of climbing plant tendrils crawling into the masonry.
High noise barrier walls on the edges of motorways are a prime target for greening. Climbing plants make the unsightly presence of these walls more bearable in the urban landscape. Here it is important to find an optimum combination of requirements. When all factors-- a rapid wall growth coverage, evergreen vegetation growth, minimal maintenance, low water requirement, inexpensive or no climbing aid-- cannot be reconciled, priorities must be set. The planting then complies with these factors. There are even scientific studies and long-term experiments on the greening of sound barriers. Please note the information under supporting walls, as well as dry stone walls and gabion.