No Building Is Safe From Termite Regardless of how your building is constructed or the type of foundation it has, termites can find a way in, concealing themselves from exposure by building special "shelter tubes." Because they work from the inside out, it's likely that you won't see signs of infestation until the damage is done. Concrete Slabs Termites can infest your business through expansion joints where the floor adjoins the foundation, around plumbing and electrical penetrations, through stress cracks, and on the exterior surface of the slab or behind stucco and veneer coverings. Basement Termites can enter your business through voids in the foundation wall, expansion joints where the floor meets the wall, around plumbing and electrical penetrations, through stress cracks, and on the exterior surface of the foundation or behind stucco and veneer coverings. Conventional Foundation Termites can invade your business through foundation voids, plumbing pipes and pier supports; on the surfaces of the foundation walls (exterior and interior); and through any wood-to-ground contacts.