A garage door window isn't really intended to serve as a window as such. It's primarily a decorative addition to the door. While it does allow some light into the garage, the main purpose is to increase your home's curb appeal. Adding the garage door window is a fairly simple project and can usually be completed in only a couple of hours. If you install your new garage door window properly, it can last for many years to come.
What You Will Need
Garage Door Window Kit
Step 1. Choose windows that are correctly sized for your specific garage door. They must fit into one of the panels in the door. While it can be the same size as the panel, it cannot be larger than this. Use a measuring tape to take careful measurements of your garage door panels before you purchase your garage door window kit.
Step 2. Take measurements of the back of the window you will be using. Then use a pencil to mark the opening where you want the window positioned on the panel. The prefabricated garage door window you will be purchasing will have been designed so that the rear section of the front part of the window inserts through the door when you install the window. You should mark out an opening large enough that you can slide the window through. Apply masking tape to these markings to create a rectangular guide for where you need to make your cuts.
Step 3. Use a jigsaw to cut out the section you have marked out with the tape.
Step 4. Insert a tube of waterproof caulk into a caulking gun and apply a bead of this around the window you will be installing. Try to do this in one smooth continuous line along each side. Then push the window into the hole. If any caulk squeezes out around the edges, use a cloth to wipe it away.
Step 5. Go inside the garage and connect the back section of the window to the front section that you have pushed through. You might want to have an assistant standing outside to hold the outside section in place while you are doing this. Follow your manufacturer's instructions to connect the two sections, since how the two parts are connected will vary from one model to the next. Usually, you will simply insert screws that came with the kit.