So what would this 3m of filled soil mean to us? I'm assuming a lot more $$, but what extra work would it involve? More/rediculously deep pillars under the slab? Excessive earthwork? Something I want no business in whatsoever?
Browse Forums Building A New House 1 Oct 27, 2012 4:01 pm We're looking at buying a lot that is in an awesome location but has quite a bit of rise to it. Obviously this will put our site costs up so we've asked our builders to work out the costs for us. They've just emailed back saying: Quote: (the developer) has already made you aware of the excessive amount of fall on this block. Based on the engineering plan, I see that there is also about 3m of filled soil of the lot as well. I really will need to send it into our drafting department to have them assess and price your site costs for you. So what would this 3m of filled soil mean to us? I'm assuming a lot more $$, but what extra work would it involve? More/rediculously deep pillars under the slab? Excessive earthwork? Something I want no business in whatsoever? - MrsT Brought first house in 2008. Renovated...a LOT. Built in 2013. Our thread: viewtopic.php?f=31&t=67954 Re: Filled soil? 2Oct 27, 2012 5:29 pm Ask the developer if they provide and engineering or certificate of compaction report. This can potentially lower your site costs. how steep is the block? what is the natural soil out there? By and large, language is a tool for concealing the truth Re: Filled soil? 3Oct 27, 2012 6:58 pm Yeah, definitely ask the developer if it's been compacted, and if so, can they provide you with a report. Our block has fill on it too, but it's got a compaction report so the builder is only charging us for the standard H class soil for site costs. If it hasn't been compacted, you will need to pay extra for piering; how much this is depends on the soil class (we were quoted about $1,500 extra for piering on an H class lot). Settlement: 10.02.13 Slab: 06.03.13 Frame: 08.03.13 Lock-up: 05.04.13 Handover: 03.06.13 Build thread: https://forum.homeone.com.au/viewtopic.php?f=31&t=59555 Brisbane Photography Re: Filled soil? 5Oct 27, 2012 7:41 pm Lex I wonder if anyone has been watching them doing the compaction process ?? Maybe MalinViktoria ?? What's that supposed to mean..? I know for a fact that developers provide compaction certificates. Settlement: 10.02.13 Slab: 06.03.13 Frame: 08.03.13 Lock-up: 05.04.13 Handover: 03.06.13 Build thread: https://forum.homeone.com.au/viewtopic.php?f=31&t=59555 Brisbane Photography Re: Filled soil? 6Oct 27, 2012 8:16 pm Geez, was my question that unclear?! OK, let me rephrase it. Has anyone ever watched the earthmoving guys (or whoever) actually physically doing the compaction of their building site? My signature is distracting people from my wise posts ... Re: Filled soil? 7Oct 27, 2012 8:28 pm No... Why? Is there some kind of importance to knowing how it's done? It's something developers normally do when they prepare the land for sale, I'm not sure there is an option to having it done by builders after buying a block, hence the piering. Just my guess. ETA: http://en.wikipedia.org/wiki/Soil_compaction#In_construction Settlement: 10.02.13 Slab: 06.03.13 Frame: 08.03.13 Lock-up: 05.04.13 Handover: 03.06.13 Build thread: https://forum.homeone.com.au/viewtopic.php?f=31&t=59555 Brisbane Photography Re: Filled soil? 8Oct 27, 2012 8:38 pm An engineering firm would sign off on the compaction report. Why would you want to watch them compact the land? How much time do you have on your hands? There would be a requirement on how it would be performed By and large, language is a tool for concealing the truth Re: Filled soil? 9Oct 27, 2012 9:36 pm We have over 1·2m fill on our house pad in places with a 0.85m plus cut in the opposite corner Our earthworker rolled over it with the 20 tonne machine once every 150mm... nothing too special or technical about it, just alot of weight. Our slab drawing has heaps of piers all going down to rock, so I cant imagine the fill compaction has alot of impact on the stability anyway. I think all up our site costs for rock removal, earthworks, piering, material handling, concrete pump etc. have added $20-25k to the contract price... lots of that is still provisional though. Tender /1/12 Contract 14/6/12 Planning 12/10/12 Site 23/10/12 Piers 27/11/12 Slab 12/12/12 Frame 15/12/12 Trusses 17/1/13 Roof 24/1/13 Bricks 13/2/13 Plaster 1/3/13 Re: Filled soil? 10Oct 28, 2012 8:38 am Ribbon Our slab drawing has heaps of piers all going down to rock, so I cant imagine the fill compaction has alot of impact on the stability anyway. Obviously, this was constructive info - as opposed to some weird aggresive "comments" before that My signature is distracting people from my wise posts ... Re: Filled soil? 11Oct 28, 2012 1:53 pm We had what we thought was only a 1.5m slope. After taking topsoil off we found that one corner went down just over 2.5m. As a result we had to bring in approx 1300m3 of fill. This was spread and compacted with a 20 + tonne excavator. Regardless of that the engineer still wanted piers. AND yes I did watch how the soil was compacted to make sure it was being done correctly. Not the whole day, but at the start. We ended up with 18 piers 600mm wide going down up to 3 metres ( the depth got less with the slope), sitting on rock. With all the fill brought in, plus the excavator and piering costs we ran out to approx $8K. Settlement 1/2/12 New Shed 23/3/12 Slab poured 27/3/12 Frame complete 4/5/12 Roof complete 1/6/12 LOCKUP 29/6/12 Our new build blog http://kareenhillsownerbuild.blogspot.com/ Re: Filled soil? 12Oct 28, 2012 2:39 pm Lex Ribbon Our slab drawing has heaps of piers all going down to rock, so I cant imagine the fill compaction has alot of impact on the stability anyway. Obviously, this was constructive info - as opposed to some weird aggresive "comments" before that It probably would have helped to know WHY and exactly WHAT you wanted to know, your question was rather broad. *lol* Also, they don't always do piering if it has been compacted; I know this because our lot has been filled and compacted and we won't need piering. The thicker slab that you get on H class soil is to help the stability. Settlement: 10.02.13 Slab: 06.03.13 Frame: 08.03.13 Lock-up: 05.04.13 Handover: 03.06.13 Build thread: https://forum.homeone.com.au/viewtopic.php?f=31&t=59555 Brisbane Photography Re: Filled soil? 13Oct 28, 2012 9:14 pm delatite13 We ended up with 18 piers 600mm wide going down up to 3 metres ( the depth got less with the slope), sitting on rock. With all the fill brought in, plus the excavator and piering costs we ran out to approx $8K. And lol to the other post My signature is distracting people from my wise posts ... Re: Filled soil? 14Oct 28, 2012 9:22 pm Lex delatite13 We ended up with 18 piers 600mm wide going down up to 3 metres ( the depth got less with the slope), sitting on rock. With all the fill brought in, plus the excavator and piering costs we ran out to approx $8K. And lol to the other post Thank god there are contributors like Lex giving such informative and inspirational comments on this forum. Give yourself a pat on the back By and large, language is a tool for concealing the truth Re: Filled soil? 15Oct 28, 2012 9:22 pm hurryupandbuy Lex delatite13 We ended up with 18 piers 600mm wide going down up to 3 metres ( the depth got less with the slope), sitting on rock. With all the fill brought in, plus the excavator and piering costs we ran out to approx $8K. And lol to the other post Thank god there are contributors like Lex giving such informative and inspirational comments on this forum. Give yourself a pat on the back Settlement: 10.02.13 Slab: 06.03.13 Frame: 08.03.13 Lock-up: 05.04.13 Handover: 03.06.13 Build thread: https://forum.homeone.com.au/viewtopic.php?f=31&t=59555 Brisbane Photography Re: Filled soil? 17Oct 29, 2012 10:56 am Also depends on what the fill material used is as to whether piers will be required. For instance, we have varying fill from approx 1.5m to .6m across our block from front to back, however it was all imported clay. As such even with the compaction report due to the amount of potential expansion/contraction our entire slab has piers 1.5m deep in a 2.5m grid under the entire slab. Notably the pier depth was determined based on information from the compaction report as well as results of the soil test to determine the depth of suitable holding capacity for the piers. Additional site costs were around 13k over the base inclusion for the fill and fall (1m ish)iirc. So yeah, just to echo the others request the compaction report from the developer, the extra info can only help. Our Build - Places Fairhaven 23+ - https://forum.homeone.com.au/viewtopic.php?f=31&t=28045 Our Landscaping - Belial's Backyard - https://forum.homeone.com.au/viewtopic.php?f=19&t=45375 2 5493 I am not sure whether Perth has its own way of doing things in regards to this. Most of Perth has class A (sandy soil), except for some areas near rivers or hills. 2 13091 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 37139 |