Tools you will need:
- Spirit level
- Tape measure
- String line
- Post hole digger or long handled shovel
- Measuring jug
- Hose or bucket
- Spray marker paint
- Rod for tamping
Using stirrups or uprights to support a post out of the ground is a great way to provide longevity for your fence or structure as the wooden post is less likely to suffer any rot.
If you are setting uprights or stirrups to install a pergola post or posts to support a roof structure please refer to the pergola manufacturer to ensure bagged concrete mix is appropriate. If a defined strength of concrete is required then its time to have pre-mixed concrete delivered from a ready mixed concrete company.
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Tools you will need:
Materials you will need:
Although you can use any product from the Cement Australia concrete range, we recommend Cement Australia's Concrete Mix.
For increased strength & durability we recommend using Cement Australia's Extra Strength.
Before you begin any project, please ensure you protect yourself with the following:
Use a tape measure, stakes, a string line and some spray marker paint to work out the correct locations for your holes.
Use a post hole digger or long handled shovel to dig your hole(s).
Refer to our simple Calculator to work out how much concrete product you will need.
Pre-soak the hole thoroughly with clean water and allow the water to drain into the soil.
In a non-porous vessel, such as a wheelbarrow, add the Concrete Mix no more than 2 bags at a time. Add exactly the amount of clean water instructed on the back of the packaging per bag of Concrete Mix and mix thoroughly remembering that excess water ruins good concrete.
Ensure you check the back of the packaging for correct water quantity. Using Extra Strength Concrete Mix will have a different water mix ratio.
see how to mix concrete to the right consistency
Fill your hole to approximately 25% depth with concrete. Position your upright in the centre of the hole pushing it into the concrete very slightly, ensuring that it is set to the correct depth based on the required height of the timber you will be attaching to the upright. Add the remaining amount of the mixed concrete to the hole, filling the hole to just above ground level. Tamp the product around the upright using a rod to remove any air pockets. Should you need more concrete for the hole, immediately repeat the process with another bag.
Tamping is essential to remove air pockets and achieve a solidly set upright every time.
Heap the surface of the concrete to create a rounded crown around the upright so any surface water flows away from the upright.
Allow the concrete to harden for a minimum of 7 days before attaching any posts to the upright.
If using Extra Strength Concrete Mix, posts can be attached to uprights in 5 hours.