Termites put your home at risk for serious and expensive damage that could turn your biggest investment into your biggest expense. Whats worse, termites may have been quietly eating your house from the inside out without your knowledge. Termites live in soil and forage for food and water. If they encounter your homes foundation while foraging, theyll follow any crack, crevice or plumbing line into your house. (They only need an opening 1/32-inch wide.) They may enter through wood in direct contact with soil or by building pencil-sized mud tunnels from ground level to where the houses wood frame begins. Termites also can enter through expansion joints in the foundation and utility and plumbing openings.