Installing on a house or garage door
The Heavy Duty Dog Door® and Big Dog Door™ are installed on the outside of a house door.Determine Height To find correct height of the hole for your dog, measure the belly height of your pet. (Average installation is six to twelve inches.)
Mark the height in pencil on one side of your door.
Drilling and cutting hole
Drill half inch in each corner. Insert jigsaw into drill hole and cut out hole. See photo 1.
If installing on a steel door, cut hole 6/8″ (3/4″) larger, glue 3/8″ pine, cedar, or plywood strips to inside of the opening.
See photo 2.
Need pre-cut wood? Order our Pet Door Trim Kit.If installed on a raised panel door, cut hole in center of door 6/8″ (3/4″). glue 3/8″ pine, cedar, or plywood strips to inside of the opening to cover styrofoam and install trim to inside/outside of door surface.
(See our Pet Door Trim Kit)
If installing in a hollow