The answer to 'why is my carpenter ant invasion' is that carpenter ants are a common pest that can infest homes, especially in areas with damp or rotting wood. Carpenter ants don't actually eat the wood, but they tunnel through it to build their nests, which can cause structural damage over time.
Some common signs of a carpenter ant infestation include seeing the large black ants themselves, finding piles of wood shavings or debris, and noticing damage to wooden structures like walls, floors, or roof beams. Carpenter ants are attracted to moisture and often nest in areas with leaks, poor ventilation, or other sources of dampness.