Crown Clean / Dead wooding.
Many deciduous trees are prone to dead or rotting branches as part of their natural cycle, inevitably these branches pose a danger to property and people within the immediate area. "Crown Clean" involves the removal of all dead wood, crossed or hazardous branches in order to make the tree safe.
As a mature tree can often exceed a height that is safe in relation to the proximity of buildings, overhead services and premises it may be necessary to reduce the canopy thus reducing the sail area and overall height. This can be carried out in various ways. Depending on the species of tree, these methods could include Pollarding, Coppicing, or cutting out selected growth with in the crown.