Anti-termite treatment procedure

Anti-termite treatment (IS 6313, Part 2) creates a chemical barrier of poisoned soil between the ground and the building. Common chemicals are chlorpyrifos 20% EC, imidacloprid and similar emulsions diluted in water.

Pre-construction treatment

1. Excavation of foundation: After excavation, treat the bottom and the sides (up to about 300 mm height) of the trench at 5 litres of emulsion per $m^2$ of surface.
2. Backfilling: Treat the backfill earth in contact with the foundation at 7.5 litres per $m^2$ of the vertical surface of the substructure on each side, in stages as the earth is returned in layers.
3. Plinth filling: Treat the top surface of the filled earth before the soil-bearing floor is laid, at 5 litres per $m^2$.
4. Junctions: Treat the junction of wall and floor with 7.5 litres per running metre; make holes in the soil along the wall with a rod and pour the emulsion into them.
5. Surroundings: Treat the soil along the external wall perimeter, usually up to 300 mm wide and 300 mm deep, at 2.25 litres per running metre.

During construction

• Use treated timber for frames, remove stumps and roots from the site, and avoid wood scraps in the filling.
• Do not disturb the treated soil; if it is disturbed, re-treat it.
• Provide a damp-proof course and keep wood out of direct contact with the ground.

Post-construction

Drill holes in floors and walls along the plinth and inject the emulsion into them; treat the outside soil through trenches.