PRE CONSTRUCTION SOIL TREATMENT
Pre Construction Soil Treatment implies laying down a chemical barrier to prevent termites from getting back and forth between wood and soil. Termites need wood for food and soil for moisture, so they constantly travel back and forth between wood and soil. Where this situation does not exist, termites build the “shelter tubes” (Mud tubes) to span foundation walls and other parts of the building that separate wood from the soil. Besides building the tubes in and over foundation walls, termites may also build them inside the walls if constructed of concrete blocks or other porous material. In the case of slab buildings, termites enter through expansion joints, cracks, opening for utility and service connections.
1.0 SCOPE OF WORK
Anti termite treatment which will be covered ground covered by Ground floor slabs.
2.0 EXECUTION & SEQUENCE OF WORK.
ü Once the backfilling is completed and prior to lay the leveling screed of ground floor slab, 350mm-400mm depth holes will be done along the edge of beams and on entire slab area at 750mm-900mm intervals.
ü Then the termiticide will be injected by means of pressure injection treatment under high pressure (approximately PSI 250-290) at the rate of 1.5ℓ to 2ℓ per hole
ü In addition to the above treatment blanket spraying will be carried out on soil surface covered by the leveling screed of ground slab. For this a pressure gun will be used to ensure the penetration of the termiticide solution to the soil and thereby to soak the soil the termiticide will be sprayed at the rate of 2ℓ to 2.5ℓ of the adequate solution per square meter.
ü Anti-termite treatment will not be done under the base slab of sump, lifts and etc. which are in below the water table.
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3.0 CHEMICAL USED.
The chemical used will be BIFENTHRIN based termiticide (bifenthrin emulsifyable EC-10) which is an environmentally friendly which is approved by the Registrar of Pesticide who is the authority of regulating the pesticide usage in Sri Lanka.
4.0 SAFETY & QUALITY ASSURANCE
ü Safety Shoes/ Boots, Safety Helmet, Gloves, and masks will be used by the workers. Workers who are working in treated areas for tailing works will wear foot protections and hand gloves.
ü Technical officers from specialist contractor will supervise the work and approval for chemical treatment will be taken from the engineer in area by area. Treated area will be covered with polytheen till lay the leveling screed.
ü Once the Contractors’ Engineer and the QA/QC Engineer carried out the inspection, Consultant’s representative will carry out his inspection along with the Contractors’ QA/QC Engineer and make the final approval to precede the work
5.0 WARRANTY (From specialist contractor)
ü Pre Construction Termite proofing treatment is backed by a 10 years warranty. In the unlikely event of appearance of termites during the warranty period, we will carry out the necessary treatment to free your premises of termites without extra charges.
ü A warranty certificate will be issued for treated building units in the premises.
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