 | | Figure 1: With slab exposed, termite tubes are visible. |
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 | | Figure 2: If the slab is covered up, the termite tubes are not visible. |
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 | | Figure 3:Plant growth hiding slab. |
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Soil or concrete, above the level of the slab, can be one of the worst things that a homeowner can do to attract subterranean termites. Like with many things, early detection is critical when dealing with Formosan termites. If the termites are discovered early enough, they can easily be eliminated before they can cause major damage. In addition to facilitating termite infestation, above-grade soil can lead to very costly water damage.
To enter a house, the termites build shelter tubes to protect themselves. If you leave at least 4 inches of clearance between the brick or siding and the soil, then you will be able to see these tubes during casual inspections. (see figure 1)
If the soil level is too high, the termites can move straight into the house without being detected. In this case, the homeowner will not know termites are present until parts of the house have been eaten away. (see figure 2 )
Anything that covers the slab and inhibits inspection could be hiding a devastating Formosan termite infestation. Here the homeowner has allowed the ground cover to run wild. (see figure 3 )