reprinted courtesy of ServiceMagic.com
ProblemDry rot on wooden fences.
Dry rot is a living fungus that penetrates damp wood and consumes the cellulose, leaving a structurally unsound skeleton that reduces to powder. The name comes from a powdery residue that often grows on the surface. Look for powdery, flaky, wet or discolored wood. Wood fence posts frequently rot at ground level due to the moisture in the soil. Installing metal, masonry, or treated wood posts is the most effective way to prevent this deterioration. Keeping dirt and shrubbery away from other wood parts can also help extend the life of your fence.
-- Tips courtesy of Service Magic