When I was in business, I drilled a hold from a basement to snake a wire into the first floor wall. I went outside instead! I saw daylight through my hole and knew I screwed up. Top it off, it was my brothers house. Then years later, I had 4 people working for me, I figured I would be smart this time, all of my people were lic. elec. contractors and 1 helper. Wouldn't you know that of my LIC.guys drilled a 4" hole through the roof on the first floor which happened to BE the floor of the second floor. Ruined the wood floor and the carpet on the floor too. So much for skilled labor.
