If you have Carpenter Bees coming into your home look for the places that the Carpenter Bees are coming in through and stuff those holes with steel wool.
You can also keep Carpenter Bees away by staining and/or painting any outdoor wood that the carpenter bees may be trying to destroy.
You can also keep Carpenter Bees away from your home or other wood surfaces by making a Tea Tree oil and Citrus spray and spray it around the areas where the Carpenter Bees hang out.
Kill any carpenter bees that you may have by using some bee spray and kill any carpenter bee eggs as well if you see them.