Can termites eat through the foam in an ICF wall?
Expanded polystyrene (EPS) has no nutritive value to insects, including termites. If left exposed and untreated, they may attempt to nest in the EPS foam. Foam is approved for use below grade, as well as above grade, by all building codes as long as an approved method of protecting the foam plastic and structure from termite damage is provided. Deciding what constitutes an approved method, however, is left to local code officials.
