Termites eat cellulose to survive, which they obtain by chewing through wood. Wooden items and structures that are in contact with the soil are especially likely to be infested by termites. Most homes are built mainly with wood, which is why termites are such a problem for homeowners. Inside your home, walls, drywood, ceilings, baseboards, support beams, insulation, and window frames are vulnerable. In your yard, termites will infest roof tiles, furniture, firewood, and more.