[Ohiogirl]

we have the Andersen storm door - got at Home Depot, think Lowe's carries them too. Had Home Depot install but they did it our last day on a trip here, installer was still working on it when we had to take guests somewhere, came home and found he didn't finish (still don't know why), maybe missing a part? Said it was his first one (oh, goody). Had to have them return because it didn't open far enough.

The top part rolls up and down/screen or glass (probably not glass, probably acrylic). Love it. Creates a nice cross breeze. also feels more secure when you are on the lanai or backyard and want to leave the door open for the breeze, can just lock it. I think someone could just stick their hand thru the other one.

If you have a dog, I would not advise the whole door retractable - one of our neighbors has to use a baby gate or her dog will go thru. Another neighbor finally took it off, dog kept going thru.