Short answer: Yes, weatherstripping is a necessary part of any dog door.
A properly installed dog door will include strips of rubber or plastic that act as an insulation barrier between your home’s warm air and the outdoors. The problem is that this barrier can come undone if the door isn’t well sealed when it’s not in use. That pesky warm air can escape, leading to drafts and costing you even more money on your energy bill!
Weatherstripping helps keep that warm air trapped inside your home, so make sure to get a quality product for your pup’s safety and comfort.