Termites are a kind of insect that primarily consume dead plant materials and can break down cellulose. Subterranean termites, the most harmful wooden pest on Earth, create their colonies in the ground and frequently emerge above ground to reach cellulose or other sources of cellulose. Subterranean termites forage for food beneath the ground level to the highest point of a home’s roof peak. Door frames, kitchen cabinets, stairwells, and hardwood floors can all be susceptible to termite damage over time.