The answer to 'why is my carpenter ant swarms' is that carpenter ants are swarming to establish new colonies. Carpenter ants are one of the most common household pests, and swarming is a natural part of their life cycle. Swarming typically occurs in the spring or early summer when winged male and female ants emerge from the nest to mate and find new nesting sites.
Carpenter ant swarms can be a sign of an active infestation in your home, as the ants are looking to establish new nests. The presence of swarming ants often indicates a larger colony is already present somewhere in your home's structure. Carpenter ants can cause significant damage to wood as they tunnel and build their nests, so it's important to address the issue promptly.