Sidewalks

• The roots of cottonwood trees lie just beneath the soil surface. If the tree is planted near sidewalks or patios, the roots may grow underneath the concrete, eventually causing the surface to crack or buckle. In older neighborhoods, sections of the sidewalk may raise, becoming uneven. Repairs to damaged sidewalks generally are the responsibility of a municipality, although private sidewalks and patios are the responsibility of homeowners. Options include removing the tree, installing tree root barriers or cutting the roots and replacing the damaged concrete. Consult an arborist before attempting to remove or cut the tree on your own.
  
  

Septic Systems and Water Pipes

• Cottonwood tree roots are notorious for burrowing into septic systems, water pipes and even underground sprinkler systems. In time, these roots clog the pipes or systems, requiring expensive repairs. Several products available at hardware and home stores slow the growth of roots when placed in a toilet bowl. Have a plumber clean your pipes every fall and use a root-slowing product to prevent costly plumbing repairs.
  
  

Foundation

• Home foundations generally are safe from cottonwood root damage unless water is present. Check for and repair any cracks or leaks in your basement and install gutters so that rain water flows away from the foundation. Establish a dry zone 3 feet out from the foundation of the house and avoid watering or fertilizing in that zone. Cottonwood trees seek out water. By keeping the foundation dry, you'll eliminate root problems.
  
  

Lawn Hazards

• Over time, cottonwood tree roots may grow along the surface of the soil, creating hazards in the lawn that can cause injury or break the lawn mower blade. The roots also might send up suckers, or small trees, all over the lawn. Although some homeowners successfully cover exposed roots with soil, the tree becomes more susceptible to disease problems. A better option is to remove the tree and grind the stump completely so suckers don't return.