You will need to have the materials and tools below to produce your own concrete kerb..
- Flexible timber for the form work. (In Australia, Jarrah timber strips are easily obtained.)
- Coarse sand.
- Bags of Cement.
- Pegs, either timber or steel to hold form work in place.
- Wheel barrow.
- Shovel and spade.
- Cement Edge Trowel (or similar)
(For Kerbing, the Sand Cement ratio is, 1 bag cement to 16 shovels of coarse sand. this will produce approximately 10 linear metres at 90mm x 150mm
NOTE: 10 bags builders cement and I cubic metre of sand, will produce approximately 50 linear metres of concrete kerb at 150 x 90mm.
IMPORTANT: Wash hands if you come into contact with wet cement. (The lime in cement it will eat away any skin that comes in contact with it)
You will need to remove the grass under the area you intend to lay your kerbing.
A sand or crushed rock base is then laid. (Its important to get your levels correct at this stage.)
Set your timber form work in place, and hold it in position with the pegs hammered into the ground. 150 x 90mm.
- You can use a string line to get your lines and levels set.
- For curves a Stake driven into the ground with a string attached will suffice for any circles or arcs you may need.
NOTE: To get your timber to bend easily, cut a series of vertical lines in it, this will weaken the timber strip in this area and make it easy to bend without breaking.
Set you timber in place with pegs at your desired width.
- example: 90 x 150mm
Mix your concrete with a concrete mixer or in a wheelbarrow. and shovel it into your timber form work.
Allow a few minutes for the concrete to harden, then use a Cement Edge Trowel to give the kerb a smooth finish.
P.S. You can throw colour hardener on top of your concrete kerb, then trowel it into your concrete surface to produce a nice coloured kerb.
You can also colour the garden kerb with Concrete Colour Sealer or a Concrete Paint.
Allow 1 day before removing form work.
IMPORTANT: Cut expansion joints approximately 1 metre apart to control cracking.