I want to add a 2nd pane of glass (actually plan to use polycarbonate) on my garage door windows. Each door has two 16×40 windows, and I need to use some form of insulation kit between the panes, such as 1/4″x 1/4″ foam. I’ll need about 80 feet of this to do the perimeter of the window and also the perimeter of the plastic bezel that hold the panes in place. What would be the preferred product to use?
I am thinking of only 1/4″ thick since the 16 existing screws that hold the front an back plastic bezels together can be re-used – if I made it thicker, I’d have to replace the 1″ screws with larger ones. Will the 1/4″ space provide an adequate air space between the panes? My goal is to prevent condensation and icing on the inside pane.