Moulding Interlocking Bricks – Learning the Techniques

The construction industry has used traditional bricks for a long time, but now the interlocking blocks are replacing them. Built with a unique design, these blocks can be used during the construction of houses, walls, soakaways, sheds, ponds etc. You can buy these blocks, or you can make these with the help of specialised moulds. Brick moulds made of plastic are used to mould the interlocking blocks. You can buy these moulds from local companies in Cape Town. (Information Credit –

It is easy to make interlocking blocks with the help of plastic moulds. With practice, four men can produce 1100 blocks in 5 days. You can make a 36m2 cottage with this number of blocks. Follow these simple steps to mould and build the blocks –

  1. Oil the moulds

It is essential to oil the moulds before using them. You can use 90% cooking oil to 10% diesel for oiling the moulds. Be careful not to use any other oil or it can damage the moulds. Coat the moulds with the oil by using a brush or spray gun. You can also dip the moulds in the cooking oil. Oil the moulds properly without missing a spot. After oiling, assemble the yellow moulds with red ones.

  1. Cast the moulds

You need sand, stones and cement to cast the moulds. It needs to shake for casting which may require a vibrating table, but you can also shake them using your hands. The moulds should not be filled with the mixture to the top; make sure to leave a gap.

  1. Cure the moulds

Once the moulds are filled with the mixture, they need to be left for two nights for the blocks to form. Keep in mind that the moulds must not be moved during this time or microscopic cracks may form. These cracks will decrease the strength of the blocks. So, keep them protected on an even surface. Another important aspect is preventing the evaporation of the blocks. To do it, apply oil on top of the blocks after half an hour of casting and keep it covered with a plastic seal.

  1. Release the blocks

Removing the blocks from the moulds must be done very delicately so that you do not damage your blocks or the moulds. The strips must not be hit directly while unzipping blocks. What you should do is use a small washer first and then a bigger washer and then roll down both sides of the strips. After that, a mallet can be used to tap gently for removing the blocks.

  1. Store the blocks

After you remove the blocks from the moulds, they can be used. However, you cannot use them immediately. Store them for 28 days with care after demoulding.

Contact the brick moulds suppliers of Cape Town to start building your own blocks for using in the construction of buildings.

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