Step 2: Setting the posts
Your first job is to mark the line of the fence. Drive a stake into the ground at one end post position, and run a string line along the boundary the full distance; stake out the opposite end post. Then measure and stake all intermediate posts at equal distances. Posts are usually set 2m to 2.7m apart for a fence up to 1.8m high.
To make sure all the posts will be in a straight line, set both corner posts first. Dig holes 600mm deep x 300mm square. For fences higher than 1.8m, set your post about 1m into the ground. To make your job easier, consider hiring or buying an auger-type post hole digger.
Before setting the posts in the holes, place a timber sole plate in the bottom of each hole. Or a 50mm layer of concrete can be used instead of the timber sole plate. Stand the post on the sole plate. You’ll need to brace the post temporarily so it stays upright and straight. Where posts are to be set in sandy soil, special post struts may be required.
Fill the hole completely with a 50/50 mixture of soil and dry cement. Check the post with your spirit level and adjust the braces if necessary to hold it square in place. Then firm the mixture by tamping down hard. Add water to the mixture in the ground to set the cement in the soil. Above ground, slope the mixture away from the post to allow rain water to run off.
Then stretch two string lines between the two end posts to align the ones that come between. They should be set flush with the string line. Dig the holes and set each post in a mixture of soil and dry cement as you did for the corner posts.