Termites consume and live off of cellulose, which is found in wood, leaves, and organic debris. Consequently, these wood-destroying pests infest materials containing cellulose, making your lawn and garden equally as attractive as your home. Subterranean termites need contact with soil to survive, making wood materials in your garden or wooden furniture on your deck vulnerable to termite damage. Preventing termites from infesting the exterior of your home requires similar methods to preventing termites indoors. Eliminating excess moisture, cleaning up piles of wood and debris that attract termites, and properly applying a preventative treatment.