Subterranean termites love wet ground, so if your house has a wet crawl space underneath it, from a plumbing leak or bad drainage, that can be a big problem! You are basically rolling out the red carpet for subterranean termite infestation. The Crawl space underneath the house should always be free of cellulose debris and dry.
Subterranean termites can be very destructive- they live in larger colonies, 20,000 to 50,000 termites than Drywood termites 5,000 to 10,000 termites, and can compromise the structure of a building over time. One easy way to identify subterranean termites is to look at the termite damaged wood. If there are muddy streaks or what looks like dirt all over the damaged wood, that tells you that you have subterraine termites and not drywood. Subterraine termites live in the ground and travel back and forth so they bring up dirt and mud, whereas drywood termites live in the wood and their damage is much cleaner with no dirt or mud.