There are two different types of window frames for garage door windows. One type is a screw together design and the other is a snap together design. The screw together windows are usually easy to deal with when replacing broken glass. Simply remove the screws from the inside of the frame and the inside portion of the frame comes off and the glass sandwiched between it and the front portion. You will need someone to hold the outside portion of the frame from falling out when you’re working on the inside. Just pop in a new piece of glass and you are done. The other type is a snap together design. It’s pretty obvious because there aren’t any screws on the inside of the frame. This is a little more difficult for glass repairs. You will need to take the window section off of the door and lay it flat on the garage floor or any other perfectly flat surface. You need to lay some cardboard flat on the floor to cushion from the concrete.
Take a razor knife and cut the back portion of the frame off. Each side of the square piece is separate so you will have to cut off all four sides.
After you get those off and take the broken glass out you should probably replace the front portion of the frame. The back portion will need to be replaced because it was cut.
Install a new piece of glass while the section is still on the floor. The new frame will snap together. This is pretty tricky because you have to use a hammer to snap the four pieces onto the back to lock them and the glass in place.
It’s hard not to hit and crack the new glass. Get a couple extra pieces of glass just in case. After you get them installed you can put the section back on the door. Done deal.
