High tensile fence is a good idea to overlap the fence boards to compensate for the natural contraction of wood. A fence with boards placed tightly together can look firm when it is new, but as wood ages, the doors open and become easy to see through. You can counter this by hanging boards on both sides of the rails. Overlapping all boards about one-third of the board’s width is cheaper than barbed them, but it will be more expensive on a two-layer fence. However, it will remain peep-proof.
Mark the circumference of the high tensile fence. Dig holes in the corners and at 2.4 meters (8 feet) intervals between corners. The depth of the holes should be one third of their above ground height. Place the posts in the holes, and backfill with concrete mix, using a level to make sure each post is solder while lying concrete. The height of each post should be 2.10 meters (7 feet). Let the concrete set. Mount the upper rail at the top of the posts. Cut 5 out of 10 cm (2-by-4 inch) rails with a circular saw so that they go to the midpoints of the posts, and screw them in with 7.5 cm (3 inch) nails. On sloping ground, you need to level the fence, so start installing the rail on top of the post at the lowest point.
Mount the next rail on top of that insert and continue upwards, installing rails in the same way. Mount the bottom rails between the posts, cut them with a circular saw so that they lie between the posts. The lower rail should be 20 to 30 cm (8 to 12 inches) above the ground. If the ground is sloping, tier the bottom rail in the same way as you did the upper rail in step 3. Use a level to make sure each board is straight, and allows a gap between the cards that is one third of the board width. The discs should be as close to the ground as possible without touching. They will extend about 30 cm (12 inches) across the upper railing.
Use screws to attach tensile fence boards to the other side of the rail, with the same gap, and place the boards so that they are in the middle of the gaps between the boards on the other side. Cut two 5 by 10 cm (2-by-4 inch) railings to fit into the door entrance. Place these rails on a flat surface so that their spacing is the same as the distance between the upper and lower rails of the fence. Join them by screwing on two fence boards so the ends of the rails are flush with the edges of the fence boards. Add 10 cm (2-by-4 inch) struts extending from one end of the upper rail to the diagonal end of the lower rail.