If you want to keep your neighbors from looking at you and your family while your out on your deck, then you should consider building a plywood privacy fence. These are lightweight and inexpensive. They also provide more privacy than a lattice fence. It's relatively straightforward to build as long as you have the right materials. Below is a guide to help you get started planning out your fence.
Pressure Treated 2x4's
These pressure treated lengths of wood will be used as the posts. You will attach the posts to your deck's railing. The plywood will then be attached to the posts. You should space the posts 12 inches apart. So measure the length of space on your deck where you want to have the fence and then divide by twelve. This will tell you how many 2x4s you will need.
A pre-cut 2x4 stud will be about 8 feet high. Determine how high you want your privacy wall. If you only want it 6 or 7 feet high, then you should have the salesperson at the home improvement store trim the 2x4's for you.
You will attach the 2x4 to your railing posts with these weatherproof screws. If you use regular screws they will rust out and your fence will fall apart.
Pressure Treated Plywood Fence Panels
You should look for specially designed plywood fence panels. These are made of plywood, but they have a nicer appearance than regular plywood. You can choose ones that have a stockade design with beveled edges at the top, or ones that are have a lattice style transom design at the top.
These looks much nicer than sticking a plain, square sheet of plywood up on your posts.
The panels should be attached using galvanized screws. If you want to hide the screws, make sure that your drill has a countersink attachment. This will drill the screw slightly below the surface of the wood. You can then fill the top with wood putty and then cover it with paint or stain. This is done to hide the appearance of any of the metal joinery.
Exterior Paint or Stain
Even though the panels will be pressure treated it's a good idea to paint or stain them. This covering will help protect the wood from the sun's UV rays, as well as make the fence more attractive. The downside to paint is that it flakes and needs to be touched up quite often. The downside to stain is that it fades after a few years in the sun and needs to be reapplied. You can paint over paint and change the color, but if you want to change the stain you will have to strip it completely off. So, if you're the type of person who likes to change colors frequently, then exterior paint might be the easier and a better choice.