Most homeowners think fence installation is simple. Dig holes, drop posts, attach panels. Done. Then the fence starts leaning after six months. Here's what goes wrong and how to avoid it. Mistake Number One: Ignoring Property Lines You'd be surprised how many people guess where their property ends. Then the survey comes back and the fence is two feet into the neighbor's yard. Always get a survey before you dig. Save yourself the legal headache and the cost of moving everythin