The answer to 'how to prevent carpenter ant' is to take proactive steps to make your home less attractive to these pests. Carpenter ants are attracted to moist, decaying wood, so it's important to identify and address any sources of moisture or wood damage in your home.
Start by inspecting your home for signs of carpenter ant activity, such as piles of sawdust or small holes in wood. If you find any, seal off the entry points and remove any damaged or decaying wood. You should also keep your home clean and dry, fix any leaks, and store firewood and other organic materials away from the exterior of your home.