Pre Construction Treatment
Pre constructional anti-termite treatment is a process in which the soil around the building is treated at a very beginning stage of construction, ie, during the construction stages of the substructure up to plinth level. It basically involves treatments in very prime and exposed areas like trenches for columns, plinth beams, plinth filling, at junction of walls and floor, in expansion joints etc. Before that, a thorough site inspection is required to properly assess the quantity and dosage of chemicals.
Post Construction Treatment
Now this occurs as a maintenance process for those buildings which are already infested by termites. Proper termite inspection is carried out to get to know the spread of termites in the building, and to detect the points of entry of termites in the building. Any shelter tubes detected are immediately dismantled by injecting anti-termite emulsion through them. If the attack is severe, the soil around the building, and soil under the floor may be injected with anti-termite emulsion. This treatment may be applied upto a depth of 30 cm below ground level. To prevent the entry of termites through voids in masonry, 12 mm dia. Holes are drilled at 30 cm c/c at downward angle of 45 from both the sides of walls at plinth level and chemical emulsion is pumped into these under pressure. These holes are then sealed.