This is a process in which soil treatment is applied to a building during the early stages of its construction.
The removal of trees, stumps, logs or roots from a building site reduces the hazards from subterranean
termites. Similarly, the sub floor area should be kept free from all debris in which new colonies of termites might be established. In order to ensure uniform distribution of the treating solution and to assist penetration, some site preparation, may be necessary.
The information given below is for guidance in preparing a building site for chemical treatment.
Heavy Soils and Sloping Sites
On clay and other heavy soils where penetration is likely to be slow and on sloping sites where run off of
the treating solution is likely to occur, the surface of the soil should be scarified to a depth of at least 75 mm.
Sandy or Porous Soils
On loose, sandy or porous soils where loss of treating solution through piping or excessive percolation is
likely to occur, preliminary moistening to fill the capillary spaces in the soil is recommended.
Levelling, Excavations and Filling
All sub floor levelling and grading should be completed; all cuttings, trenches and excavations should be completed with backfilling in place, borrowed fill must be free from organic debris and should be well compacted. If this is not done supplementary treatments should be made to complete the barrier.