In most cases and if you purchase a prefabricated garage door window the window will come with screws which are used to screw the front and back sides together.
Making garage door window.
If not simply follow the instructions your manufacturer provided for securing both sides of the window together.
Make faux window garage door windows.
It s ok you want a clean line and it s.
If your garage is finished remove the drywall or paneling in the spot where the new window will go.
Mark your frame width.
With the door in the 90 degrees open position start sliding scrap under the outside bottom of the door until your hinges are aligned.
Determine the measurements of the window you want to install.
Add 1 2 inch around for shims and insulation i e.
How to build a window frame for a garage step 1.
Find a 1 2 inch or whatever you decided for the bottom gap piece of scrap and place it under the door near the post.