Structure and health
Most tree damage can be avoided by pro-active tree pruning. Removal of weak, overextended, conflicting, dead and diseased branches typically increases the lifespan of a tree by reducing vulnerability to storm events and premature failure. It's much better to remove small branches before they become problematic. The removal of large limbs is not ideal for tree health and structure since large wounds are much more vulnerable to decay.
Storm damage repair
Broken branches should be correctly removed to encourage healthy closure over exposed wood, ensuring sound tree structure in the future.
Dead and diseased branches should be removed promptly to reduce infection potential and improve air circulation. This is important to minimize conditions that encourage fungus development.
Integration with buildings and infrastructure
Trees in the urban environment need to be pro-actively pruned to clear manmade structure while maintaining their useful purpose in the landscape. Delaying this process ends up compromising the structure and health of the tree over the long term. It's much better to remove a small branch before it becomes a problem. This helps to avoid imbalancing the structure of a tree, and large wounds are much more vulnerable to decay.
Trees are often pruned to satisfy landscape objectives such as important views, shade and light penetration.