Some trees are healthy, but just require trimming. Often, trees shade roofs, giving moss the perfect environment to grow. This can cause damage to eaves and shingling that can be costly to replace. In other circumstances, trees may have obvious storm damage or dead branches that land owners want cleaned up. With proper pruning, this will help the tree to heal to its maximum potential. Unattended, often the branch will die back into the heart, or the tree, compromising its integrity and ultimately shortening the life cycle.