Most ant species are only a nuisance to have around, but Carpenter Ants can pose a serious threat to a building. Carpenter Ants are the most common and efficient wood-destroying organism in Western Washington. They are capable of hollowing out large portions of wood during the development of their nest.
Contrary to common belief, Carpenter Ants cannot digest the wood they burrow into; they are simply tunneling through it. This behavior helps to decompose fallen trees in the forest, but it is not welcome in our homes. It is not uncommon to find large mounds of sawdust-like material (called frass) near the wood they are tunneling through. Carpenter Ant frass is usually easy to identify, due to the small bits and pieces of insects you will find mixed into it.