An arborist can determine what type of pruning is necessary to maintain or improve the health, appearance, and safety of trees. These techniques include:

• Eliminating branches that rub each other.
• Removing limbs that interfere with wires, building facades, gutters, roofs, chimneys, windows, or which obstruct streets or sidewalks.
• Removing dead or weak limbs that pose a hazard or may lead to decay.
• Removing diseased or insect-infested limbs.
• Creating better structure to lessen wind resistance and reduce the potential for storm damage.
• Training young trees.
• Removing limbs damaged by adverse weather conditions.
• Thinning or removal of branches to increase light penetration.