iving your dog free access to an enclosed backyard or garden can make life easier for you and more interesting for your pet. You won't have to listen to anymore whining at the back door for play time or toilet time. Learning how to install dog doors at home is easy when you have the right tools, a checklist of things to do and know-how.
Doggy run inside garage with dog door to go inside or outside
Plastic: This is a very traditional model which allows you, and your pet, to see through the door. Although it's convenient to see outside so easily, it may be a security problem: if you can see out, then others can also see in. You can have it tinted for added protection.
Metal/Aluminum: These doors are heavier which makes them more durable and protective. But they are also loud when opening and closing, which may be good for security reasons: this natural alarm system scares away unwanted pests or intruders and allows you to keep track of your pets' activities.
Glass Doors/French Doors: Yes, dog doors can be put into sliding glass doors with special products and installation, allowing you to keep the view and beauty of your home.
Walls: Yes, these units can also be put into walls if a door in not available, or if you want an entryway/exit between areas that normally stay closed (garage, laundry room).
Electronic Dog Doors: Electronic dog doors will keep your pet door to stay permanently locked for surefire security. They automatically unlock when your dog or cat approaches through an infrared or magnetic signal that is transmitted through a key attached to your pet's collar.
Garage fire door question. - InterNACHI Inspection Forum
I do have a small question, why a dog door to the garage? Do you really want your dog to do his business in your garage? I've seen dog doors from the garage to the outside, in fact I have one, but from the inside to the garage?
Pet Door cut into Garage door - InterNACHI Inspection Forum