Unfortunately termites have very small eyes and so cannot read posted signs saying termites are not welcome here. Sadly they have been known to return occasionally very soon after a building has been treated. Wood can be treated before construction and certain lumber is specially treated ……………… But eaves and rafters, fascia boards and starter boards are usually made of soft wood which is particularly appealing to termites. Termites are above ground cave dwellers by which I mean they live above ground inside caves made of wood that they bore out like warrens. Subterranean termites are different and the subject of a different article. Many companies promote their new and improved method of getting rid of termites. There are essentially six different ways. Spot treatment where the wood is accessible and is injected with a fungicide that kills the termites in that local area; Very effective and inexpensive on say eaves or fascia board.