This is my favorite thing about my coop - its a thin piece of plexiglass, very easy to look through, lets light in and in the mornings the chickens are all looking out that window. I have it rigged up with a temporary arrangement but I want to screw some sort of trim (or something) around it to attach it securely and keep rain out. Is there any sort of thing I can buy at a hardware store that has a lip or channel (I've looked at moldings, weatherstripping supplies, hardware things) but haven't found anything so far. I'm not sure what exactly to look for. I don't have the type of saw that could cut a lip into a piece of wood - I wish I could!