Crown reduction involves the removal of branches to achieve a height reduction in a tree, and reducing the overall tree ‘crown’. This work is sometimes undertaken to reduce the wind sail effect of exposed trees or trees which may have suffered root shear or damage. Construction can often be a contributing factor to this.
Crown Thinning is a pruning technique that involves removing a number of secondary branches in such a way that it produces a balanced crown structure, without altering the overall size or shape of the tree. This is a good way to preserve the natural shape of your tree(s), and reduce the chances of wind-throw by allowing the wind to pass through the crown with less resistance.
Crown Lifting is simply removing specific lower branches, this allows more space and better access at the base of the tree. This work is often taken to improve access, whether to ease vehicle access or branches obstructing a walk way or to allow for light requirements.
A big deal in keeping a healthy tree. This is the removal of major (greater than 5cm diameter) deadwood, decaying and dying branches which can become just another starting point for decay entering the main stem. This does not include deadwood on branch tips or areas of green foliage.