Termites need only a very small space to get into your home - 1.0mm is enough.
Your biggest problem is recognising the signs that your house is under attack.
The first obvious place for termites and other pests to get in is from under or alongside the home itself. There are two vulnerable spots for a home with normal slab-on-ground construction; up through the plumbing or electrical pipe penetrations and up into the wall cavities along the perimeter of the home.
It is not easy, however, to find out where termites have entered your home as they generally enter through hidden access points. You will need a pest control expert to find and treat termites.
Home owner tips:
Put your mind at rest - Call 13 PEST (13 7378)