What is the least likely point of entry for subterranean termites in a house?

The fascia, which is typically the board that runs along the edge of the roofline, is the least likely point of entry for subterranean termites because these pests primarily thrive underground. Subterranean termites usually enter a structure from the ground level, making access through areas like basements, crawl spaces, and foundation cracks far more common. They prefer moist environments conducive to their survival and reproduction, which are often found in lower levels of buildings.

Additionally, while the fascia is above ground and does not provide direct access to the soil where these termites live, the other options involve areas that either are underground or have easy access to the ground where subterranean termites can establish colonies. Therefore, the fascia is not a typical entry point for them, as their primary behavior is to tunnel through soil or wood that is in contact with the ground.