I used the bead board from Lowes/HD on my screened-in sun porch. I used it for the knee walls and the ceiling. First I cut all the panels to fit, then (before nailing them on) I put a coat of really good exterior primer/sealer on all sides (even the edges and back side), then 2 coats of good exterior white paint. Then I nailed it up with stainless steel nails. After 2 years it looks good. The key is getting all the edges sealed up so moisture cannot get in and rot the wood.

Phanthom screens can make and install large roll down screen walls. The large ones are motorized. Here are some of the specs. for the large roll down screens: * * * (cut and pasted from http://www.phantomscreens.com/products/execspecs.html) Executive features Fits most oversized applications Retracts out of sight when not in use Adaptable and versatile Remote controlled at the touch of a button Optional manual retraction system Complete ventilation Keeps pests at bay Enhances privacy Popular, designer colors Variety of screening and shading options to suit your needs Professional service and installation Limited Lifetime Warranty Adaptable to your needs Executive Motorized Screen Sizes Width ......... Pull Length 40" to 25' ..... 2' to 16' Executive Manual Screen Sizes* Width ......... Pull Length 18" to 19' ..... 2' to 11' *Not all mesh options are available in all sizes. A choice of colors Executive Screens are currently available in White, Brown, Almond, Bronze, Sandal Wood and Driftwood Beige. Classic White Rideau Brown Slivered Almond Bronze Sandal Wood Driftwood Beige A variety of options The Executive Screen has a variety of screening and shading options to enhance your home's unique features: Insect screen: Reduces up to 55% of UV rays and is recommended for large openings and to keep bugs out. Solar Screen: Blocks the sun's heat and glare by up to 75% while keeping pesky insects out. Premium Solar Screen: Offers substantial shading and reduces fading by blocking up to 80% of UV rays. Privacy Screen: A complete block-out material that provides up to 100% blockage of UV rays. Ideal for home theatre rooms. * * * Katy Here is a link that might be useful: Phanthom screens

An interesting product...some of you may not know what I'm talking about but we have no see ums in Illinois. Especially on a lake. Nasty little biting bugs. Here is a product that has a smaller size to keep out those pesky critters! I wonder how much the visibility is actually reduced. http://www.wholesalescreensandglass.com/Phifer-NoSeeUm-Aluminum-Insect-Screen.html

We had somewhat of the same problem. We decided just to put siding inside and out on that section. Besides it gave us a little privacy from the neighbors. Sorry my pictures aren’t very good, but it might give you some idea.