Safe clearance consists of pruning trees so as to prevent damage to structures by contact with tree limbs. Where possible, live oak limbs are pruned to 3′ from any structure, and other species will be pruned as far back as 4′. This allows enough space between trees and structures that, with normal growth, the procedure should not need repeating for at least three years. We recommend removing dangerous limbs above your roof, and clearing your roof from limbs 2-6 feet back to remove the highway for rodents, to prevent damage of shingles & scratching in wind, & to increase the longevity of your roof.