How to install fence palings
You will need someone to help you sink the posts. Put the post in the hole and use the spirit level to make sure it's centred, straight and flush with the string line.
Have someone hold the posts in the ground so that they're centred, straight and flush with the string line. Follow the instructions on the bag and pour the concrete into the hole, so that it's just below the surface of the soil. Add the water. Backfill the hole with soil and compress it.