Landscapers across southeast Queensland are realising that recycling existing site soil to make AS4419, MRTS16 or custom blend topsoil is significantly cheaper than purchasing imported topsoils. It also offers environmental benefits to their clients.

The rotating action of our trommel screen means we can screen and ameliorate (add mix-ins) at the same time, avoiding double handling. We also deal with clay soils, wet and bulky materials.

Our expert soil scientists (or your own, if preferred) can recommend ameliorants and ratios to improve site soil to AS4419 standard, or create a superior custom blend suitable for the plantings on your site.

Cost Effective & Environmentally Friendly

Recycled topsoil generally costs less than half the cost of imported topsoil, especially when you factor in the cost of purchasing and transporting the imported topsoil to your site.

Reusing existing soil means fewer trucks on local roads carting away waste and bringing back imported topsoils, resulting in less change to the eco-system on your site. This video has more information on amelioration using a trommel screen:

Soil Testing

The first step in this process is soil testing in which a sample of your soil is sent away for evaluation. Our soil scientists will ask you about your budget and what you are trying to achieve with the soil.

For example, planting native grasses on a batter beside a highway requires different soil than growing grass on a sports field or a vertical garden on a highrise building.

You can achieve almost anything with ameliorated topsoil, but if you want to turn a hessian bag into a silk purse you need to be prepared to pay for ameliorants.

Soil testing and amelioration recommendations usually cost less than $500, giving you the option to pursue or think it over.

The soil scientist provides you with test results and amelioration recommendations around 7-10 days after testing. There is no obligation to proceed past this point. If we can’t achieve your vision within your budget, we won’t proceed with the job.

Proceeding With The Job

After reviewing the soil report, we decide if screening and ameliorating existing site soil is a viable option for your job. If it is, we prepare a proposal including our screening recommendations and the cost of ameliorants.

Screening generally costs between $4 and $8 per m3 depending on the materials being screened, the complexity of the custom blend, the screen size and the quantity required.

We are cost effective for quantities anywhere between 300m3 and 300,000m3 and supply ameliorants for an additional cost if desired.

Final Steps

When it comes to being environmentally friendly and cost-effective, amelioration of existing site soils is your best option. Our advice is free, so give us a call on 1300 748 388 for more information.

Our lead-time could be as little as two days or two months depending on the time of year, so the more notice you give us, the better.


Their vast knowledge in their field means that they have have been able to save our projects money by offering quality information and producing more yield than other contractors. Continue Reading

Dave Miller Senior Estimator, Topgun Landscaping

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