Reference Documents - MCU23 0070

7. Trees and shrubs
The roots of trees and shrubs can         Height of Tree(h)
affect footings by removing moisture      Distance from house (d)
from clay soils immediately underneath    d = 1 h for class H and M sites.
the building causing subsidence as the
                                          d = 1.5 h for class E sites.
clays shrink.
                                          d = 2 h for rows or groups of trees.
In its search for water, a tree root
system can spread a lateral distance       10 to 20      20 to 30        30 to 60
equal to the height of the tree. If in     metres        metres          metres
rows or grouped with other trees the         Acacias     But-But         Blue Gum
roots may spread up to twice the
                                               Ash       Cedars          Cypress
height of the tree.
                                            Athel Tree   English Oak     English Elm
Care should be taken when selecting
trees and, as a guide, the trees listed     Candlebark   Lemon Gum       Figs
should not be planted within the           Manna Gum     Palms           Karri
distance of their mature height from       Pepper tree   Planes          Pines
the house depending on the site
                                             Willows     Sheoaks         Poplars
classification and whether they are to
be planted in a line or in a group.            Yate      Silky Oak       River Gum
                                           Yellow Gum    Spotted         Sugar
                                                         Gum
                                                         Casuarina



  TREES AND SHRUBS