19. Typically the glass is installed with a strip of butyl that needs to be purchased from your local glass shop. As things sometimes go, we forgot to pick some up before the day of the shoot. Our glass shops were closed, so we need to pull out our best MacGyver impersonation and use some black gaffers tape. If you have the correct butyl strip the process will be the same except you will only need one layer. We had to apply four layers of tape to the edge of the glass to get it to the correct thickness to take up the slack between the glass and the frame.