Create your own pass-through window. If your kitchen window opens onto a deck or patio, why not turn it into your own private bar? A counter and stools tucked right up to the window make it easy to pass drinks and snacks right from the kitchen.
A clear plastic roof may be just what you need. You can get clear corrugated roofing at your local building supply store or try something a little different. The material in this photo is inch thick honey comb plastic from Tap Plastic.