I'd add a ceiling fan or two if they can be kept out of the weather. Makes the place more useful for longer periods of time.
Two of my neighbors have done this and say that they are very pleased with the results.
One even has a TV up there, too.
What about asking at the local lumber yards for ideas, maybe bring pictures? You can get them to cut strips of lumber to use to make a "frame" around the opening, and you can buy screening to go over the area (use a staple gun to staple in place) and then one more layer of a lumber strip. It would be like making a "sandwich".... 2" wide strip of wood, screen that is stapled to the wood and then another strip of wood. You could get the lumber yard to make the wood in a special molding or shape for you since this is hopefully permanent and then paint it to match the house.
This is what we had to do at our place... Just before last winter (fall of 2003) we custom built a large sunroom that had 10 windows all around it, 6' wide by about 6' high each. We had plastic over the openings (where the window would be installed) in the winter for the first year. In the summer we put screening on the openings and reinstalled the plastic once it turned cold again. A few months ago we had the windows installed, no more screen and plastic.
Try this web site...does it help?
http://diynetwork.com/diy/so_patio_ ... cle/0,2029,DIY_14358_2270668,00.html
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