Green Roof Systems For Trees

Ferns such as polypodium vulgare and asplenium trichomanes could be used in dry shady conditions.

Green roof systems for trees.

Trees are an. A green roof or living roof is a roof of a building that is partially or completely covered with vegetation and a growing medium planted over a waterproofing membrane it may also include additional layers such as a root barrier and drainage and irrigation systems. Trees are dominant elements in any landscape and on a green roof trees will generally be stunted in height and spread when compared to those planted at ground level. The venny green roof has shallow substrates on two types of roof the first roof is on shipping containers and is designed for a dead load of 250kg m 2 and live load of 100kg m 2.

We serve homeowners in and around st. Size 1 trees can be used in some situations but do require special provisions. Album delosperma could be tried in a sunny frost free area. Container gardens on roofs where plants are maintained in pots are not generally considered to be true green roofs although.

In some situations you may be able to connect tie downs to surrounding planter side walls or container edges but the best method is to stabilize trees with anchors at the bottom of the soil system. Green roofs are a worldwide megatrend in architecture. Try dry habitat perennials and. As the green roof industry has matured green roof designs are changing from rather simple extensive green roof systems to very complex urban landscapes on structure.

Intensive systems allow the designer to create a park like setting so they are the best option for roof gardens that will be occupied. Intensive green roofs require the deepest soil and have the greatest impact on the structural design but they also accommodate all types of plantings including large shrubs and trees. The depth of vegetation support medium is also deeper and varied to support a diverse range of vegetation species from groundcovers shrubs to small trees. The greater the roof exposure and overall site hostility the more important tree selection becomes.

Mat forming species of sedum sempervivum and moss are good choices. Size 2 or 3 trees which do not have too much foliage and which have a compact root system are best suited for roofs. On green roofs you can consider other options for stabilizing trees which aren t common in traditional landscaping. Common sedum species used include sedum acre s.

The smallest trees can be secured with counterweights and the larger trees will have to be attached to an underground reinforced netting. Leading designers and landscape architects are envisioning and creating ever more sophisticated green roofs on top of buildings. The second trussed roof is designed for a dead load of 160kg m 2 and a live load of 40kg m 2.