Out in the wild, ants will build their colonies just about anywhere, but when they can take advantage of the structures of our homes, many kinds of ants like to live indoors. Lots of people in the North & East Bay have noticed that ants enter their homes through cracks and crevices every winter, looking for food, water, and shelter. Once they’ve made it into your walls, ants can cause damage and fire hazards by chewing through electrical wiring.