Syd from Phila., Pa. writes
When drilling through a slab you should use a 1/2 sized drill bit 18in long and the holes should be no more than 12 inches apart. Just like outside, you should apply 4 gallons of Termidor per 10 lineal feet inside. So if you have 10 holes over 10 feet and need to apply 4 gallons over those 10 holes, it works out to be just a little bit under 1/2 gallon per hole.
Answer last updated on: 05/22/2013