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Commonly asked questions > Base Preparation > How do I prepare a base?

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Concrete Slab
The no-compromise solution to base construction is a reinforced 100mm concrete slab.  A slab can be square or round.  The base should always be 100mm larger than the diameter of the tank. Prior to pouring the slab, ensure the ground has been 100% compacted. Your base will be compromised if soil has not been compacted and will affect your tank guarantee.

Crusher Dust/Sand
A crusher dust/sand base is considerably cheaper than a concrete slab, but may need to be augmented over time.  Heavy rain falls can erode a crusher dust base and may cost you extra if it needs to be repaired. 


It’s best to use treated pine sleepers, screwed together at the ends to create a retainer for the crusher dust/sand but many other materials are appropriate.  Ensure base is compact and sturdy prior to laying down the crusher dust/sand. Base should be anywhere from 25mm to 50mm high when compacted.  Crusher dust or sand is available from any landscape material suppliers.


Pre-Cast Concrete Slabs

A series of pre-cast concrete slabs or pavers on a sealed bed of sand makes an appropriate base for a slim cylinder tank or a tank stand.***Please note that all Wall tanks must be on a concrete base for safety.

 

  1. Prepare a flat area for your tank. Clear an area that is 300mm wider than the diameter of your tank.
  2. Make sure the ground is 100% compacted and that there are no rocks, stumps, tree roots or anything else that could affect/damage the base of your tank and void your guarantee.
  3. Place sand on base. Put in a bed of sand (packing or river sand) about 25mm to 50mm thick. Bluestone dust is also acceptable, just ensure it is well packed down.
  4. Flat & Level. Make sure your base is flat and level so that the base of the tank is fully supported.
  5. Tank delivery. Once the tank is delivered and fitted, put either sleepers, pavers or bricks around your site and box the sand in. This is important, as it keeps your base stable and prevents the sand from washing away.