Note that the time to install a garage door is when your pet is fully grown, to ensure that the entrance space accommodates his full capacity.
Installing a pet door is a great idea and handy when you can’t get out of the office in time to let the pets "take care of business". I installed a pet door for my wife’s cats, in the basement door so the litter box would not be in the house. I am going to assume that we are installing this pet door in a metal entry door with a kick plate and not an actual garage door.
For those who prefer not to cut into their main doors, a pet entrance set into your garage door can make a great deal of sense and allow your furry friend to maintain his independent lifestyle. Can this be done without undermining the integrity of your ? Yes! We’ll show you how.
Pet Door cut into Garage door - InterNACHI Inspection Forum
Installing a Pet Door for your Garage | A+ Garage Doors
A pet door can be installed in the wall, storm or screen door, garage door or sliding glass door. Cost of installation and complexity of the project varies with each option, storm door installation being the most cost-effective.Step 1 Placement
Determine where to locate the pet door. Consider the construction of the garage door. Avoid areas where the pet door would interfere with supports or braces. A sectional garage door will not accommodate a pet door taller than the lowest section. Also consider the height of the pet. Ideally, the top of the pet door should be located approximately two inches above the shoulder of the tallest pet to use it. Do not try to place the pet door even with the bottom of the garage door. The bottom of the pet door should be at least two inches above the bottom of the garage door.
Step 2 Measure
Measure where the top of the pet door opening will be. Mark the spot with a pencil. Use the square to draw perpendicular lines horizontally and vertically, marking the upper corner for the pet door. Use the level to ensure the lines are accurately drawn.
Step 3 Outline
Measure and mark the opening needed. Most pet doors come with a security panel the same size as the opening. This can be used as a template to ensure accurate measurement. Verify the measurements by holding the frame of the pet door against the outline. Double-check and see that the lines are level. The pet door will not open and close well if it is not level. That can make it difficult for the pet to use and drafty in the garage as well.
Step 4 Cornering
Drill a hole just inside each corner. A ¼-inch bit should be adequate. This will form nicely rounded corners.
Step 5 Cutting
Cut the outline of the opening. Use the holes drilled as the starting point for cutting the opening with the jigsaw. Be sure to use a blade that is appropriate for the type and thickness of the material of the garage door. Sand any rough edges.
Step 6 Assembly
Line up the frame of the pet door with the opening. Mark the location of screw holes. The edges exposed in cutting the opening for the pet door should be completely covered by the frame. If any raw edges will remain exposed, seal them with weatherproof paint or sealant before continuing. Apply a bead of caulk around the edge of the opening, avoiding the places where screws will be used. Screw the frame into place. Test the door to ensure it opens and closes appropriately. Apply caulk around the edges of the frame, wiping away any excess.