The Formosan subterranean termite generally invades structures from the ground. They commonly enter through expansion joints, cracks and utility conduits in slabs. Any wood-to-ground contact is an inviting entrance for Formosan subterranean termite infestations. The flat roofs of high rise buildings, because they always pool rain water, are ideal places for the Formosan subterranean termite to initiate aerial infestations if portals of entry are found.
Studies also found that Formosan subterranean termites attack many species of living plants. The Formosan subterranean termite attacks structural lumbers and living plants because they are sources of cellulose.