Browse Forums Building A New House 1 Jul 14, 2019 7:50 pm Hi all. Might widen my questions to a more broader community. My husband and I have bought a block of land in the Brentwood Forest Estate in Brisbane. We are going through a private builder who has included all slab works required for a soil rating up to a H1. We received a level 1 compaction certificate from the developers. Oh speaking with them, they also said the most common soil type in the area is a H1. Iām just after some information on how soil ratings work/ what the compaction certification is about and how much roughly we could be looking at for site works. Any information will be highly regarded. Thank you! A very stressed and frazzled FH builder! Re: Soil testing 2Jul 15, 2019 9:06 am Hi Hira94, A Level 1 Compaction Report generally summarises the results of the supervision and testing provided by the engineer for the bulk earthworks activities undertaken by the developer to level the sites. This is done to ensure the suitability of the filled land to support structures of various types without excessive deflection and potential for differential settlements due to differential thicknesses of filling. Soil classifications are rated on the soils level of reactiveness and some other conditions. Ranging from least reactive soil to highly reactive soil the classifications are as follows: A, S, M, H1, H2 & E. There is also an additional classification "P" which stands for Problem and will always have a sub rating as listed above. Problem sites generally have soils associated with uncontrolled fill (site without Level 1 Compaction Report), abnormal moisture conditions (trees & roots), soft or collapsing soils & landslip etc. Generally the less reactive the site the less it costs to build a suitable foundation. Since you have already had discussions with the developer and they have alluded to H1 being the most common, it would be beneficial to ensure your builder allows for H1 as a minimum and include a provisional allowance for piering. Hope this helps! We were lucky in that our old house was so small (86 square metres) compared to the new house, they were able to take enough readings around the old backyard house before… 8 38507 DIY, Home Maintenance & Repair I'm in WA and our sandy soils make drainage a bit easier but this is what I'd be doing. Dig down to your footings and let the wall dry out. Clean it all well by brushing… 1 5437 Three options 1 Ask the liquidator 2 Find another PD customer and ask the source of their report 3 Pay for new report 3 13890 |