Crown thinning involves the thinning out of branches within the structure of the tree itself, so that the overall outline size and shape of the tree remains the same. Typically, dead and diseased branches are removed first followed by crossing and rubbing branches and then if necessary further branches are removed to achieve the maximum desired effect. The extent to which a tree can be thinned is determined in part by the species and also by the nature of the branch structure.
Crown thinning is usually carried out to:
Improve light conditions
Reduce wind resistance strain on the tree
Improve the health of a tree
Improve the form and balance of the tree
Overhanging branches are removed where the growth of the tree has resulted in branches causing an obstruction and where it is not acceptable or possible to fell a tree.
Overhanging is removed where:
Branches obstruct or overhang buildings
Branches overhang neighbouring properties