How do you keep a dog door from freezing?
You may want to add foam weather seal on the back of the pet door frame, to get a barrier between the frame and the door or wall where it’s installed. If the door still freezes shut, you can use heat tape on the frame. Your local hardware store will know which products are safe to use.
Do dog doors let heat?
Leaky windows, chimneys, roofs, cracks in the wall, and yes, doggie doors can cause heat to leak out of the home into the outside. This is why you may feel very cold even when your heat is cranked all the way up. With the best insulated dog door for extreme cold weather, you will no longer have those headaches.