Place a marking flag at each corner of the area you want fenced in. Connect the flags with a light-weight rope by tying the rope to each flag in a consecutive line.
Measure the rope lengths on each side of the designated fence area, using a tape measure. Divide each length by 52 inches. The number found is the number of fence posts needed for each length of fence. For example, if one edge of your yard is 12 feet or 144 inches, then 144 divided by 52 is 2.8 rounded to 3.
Purchase the needed number of redwood four-by-fours and one-by-sixes.
Dig a 10-inch wide, 3-foot deep hole every 52 inches along the rope line. Place the first hole at the beginning of the fence.
Insert an 8-foot long, four-by-four into the center of each hole. Fill the hole with gravel. Compact the gravel every 6 inches with a tamper.
Draw a horizontal line on each post at 2.5 inches from the top and 2.5 inches from the bottom. Between these two lines is 55 inches.
Draw 11 diagonal lines, the bottom of the diagonal facing your yard, down the two sides of each post that faces another post. Each diagonal line will be 6 inches long at a 50-degree angle. To help create the diagonals and keep them even, draw a level horizontal line from the bottom of one diagonal to the top of the next diagonal.
Attach a 48-inch long, one-by-six to each diagonal line, beginning with the bottom line. Hammer the 8-d galvanized nails at a 45-degree downward angle from the top of the board into the post. The redwood board will touch the next post at the corresponding diagonal line. Nail it into the next post using the same downward angle.
Continue to place angled louvers connecting diagonal lines. Finish the louvered fence by covering the nails with wood putty.