Answer
Feb 25, 2013 - 07:35 PM
If the cement has been treated previously, and I am assuming we are talking about applying a termite chemical "below" the cement and not on top, and there are already drill holes, then the only way to remove any plug is to "redrill" the hole. But be careful, there could be any number of hazards under the cement - namely water pipes.
I always prefer drilling new holes. Reason being is that if the termites are active and the area has been previously drilled, either the holes did not go through to the soil below the cement, the chemical has long since degraded, or the termites are not entering from that area. Drilling new holes sometimes solves problems that the previous treatment did not stop.
We always prefer drilling 1/2" holes with a hammer drill. Also be sure to use a "GFI" electrical plug, if the drill bit hits metal, hopefully it will ground out and shut off.
After treatment, if you need help on this, here is our page -http://www.epestsupply.com/termite_treatment_methods.php, use the trebor plug and a small bit of cement to patch the hole.
Trebor plugs - http://www.epestsupply.com/product/TR...
Hope this helps.
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