I just went through this in philadelphia. Bait traps are the most enviormentally friendly and effective. Bait traps use a poison that the termites share between their whole tribe before it turns them to zombies that forget to eat and die, all of them. If you have damage already you don't really have time for bait traps to work because this method takes time, You need to stop them now. To do this you have to drill at the perimeter of your basment and any out side walls and pump a shit load of chemicals into the ground, less enviormentally friendly but fast acting. Most chemicals used to pump for termites suck. They only kill the termites they touch, pretty weak compared to bait traps. Terminex is different, they use the same type of chemical that is in the bait traps. It makes a perimeter around your house, then any termites that touches takes it back to the nest and shares it with everyone. Luckily for me I found a terminater that used to work for terminex, but now is on his own, using the same chemicals. I'd suggest either paying the dough for terminex or find someone else that uses the same chemical. It's called Termidor, I think. Another method I heard about is these mushroom spores. They're supposed to be planted, then eaten by the termites, shared with the tribe, and finally the mushrooms keep growning and explode out the termites' heads. Effective and sadistically satisfying. The best part is that after they're all dead the mushrooms stick around and defend against future invasions. Pretty badass, but I think they're only available out west. Good Luck!