[header] How to stop ants from coming into your home [title] Seal off all entrance areas. [step] Since ants are tiny, they can find thousands of tiny doorways into your residence. Some of them of are easy to identify; others will only be discovered when there's a parade of ants marching through them. 
First, figure out where the ants are entering the house: follow the trail of ants to see where they're entering and leaving your home. Seal all the entrance holes that you can find using silicone caulk, putty, glue or plaster.