Termites are incredibly destructive. There are certain steps that can be taken prior to the construction of a building to help prevent a future infestation. A treatment should be applied to the soil in the earliest stages to pave the way for later work that occurs in various stages. Stage 1: Before the ground slab is constructed, the base layer of soil will be treated with a chemical emulsion at a rate of 1-2 liters per square meter before any concrete is poured or sub-grade is laid. This concentration of the chemical is lethal to termites.