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Knowing how to set a post in your backyard is a handy skill. Posts can be used for installing mailboxes, building decks and even attaching screens. With a little forward planning, a few simple tools and some practice, you’ll soon be ready to transform your backyard with a whole range of D.I.Y. projects based around the humble post.
Safety tip: Always wear the appropriate safety equipment (safety glasses, ear muffs, gloves and mask, for example) and always follow the instructions for the product or equipment.
Your post needs somewhere to go, so the first step is to dig a hole. A general rule of thumb is that the depth of the post-hole should be one-third of the height of the pole above the ground. For example, if your post is 2400mm, it should be set at 1800mm above ground. In this case, the hole should be 600mm.
If you have a wheelbarrow, you can mix up the concrete in that. If not, a bucket will do.
Before you mix anything, read the instructions on your bag of concrete powder to find out the correct ratios. Add the water first, then add the powder in the suggested ratio. Mix it well using a stick or shovel to a toothpaste consistency, with no dry powder spots.
With your post in the hole, pour the concrete in, filling it almost to the top.
Before the concrete dries, you’ll need to ensure the post is straight. To do this, brace it with two pieces of timber. Attach one to one side with a clamp and another piece opposite that one. These will support the post while the concrete dries overnight. Before you finish, check the post is plumb by using a spirit level on all sides.
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Asbestos, lead-based paints and copper chromium arsenic (CCA) treated timber are health hazards you need to look out for when renovating older homes. These substances can easily be disturbed when renovating and exposure to them can cause a range of life-threatening diseases and conditions including cancer. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page.
When following our advice in our D.I.Y. videos, make sure you use all equipment, including PPE, safely by following the manufacturer’s instructions. Check that the equipment is suitable for the task and that PPE fits properly. If you are unsure, hire an expert to do the job or talk to a Bunnings Team Member.
