Browse Forums Building A New House 1 May 27, 2020 9:29 pm Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Looking for guidance $/m for split in slab on ground Site is M class but pricing as H class Split level is approx 7m long the first is 1.0m high the second is 0.5m high Note: - the additional cost of walls due to increase ceiling height is a separate issue - the cut is being used for fill under garage and leveling off some of the backyard Re: Concrete Split level Slab costs 2May 28, 2020 3:40 am 1 m fill under the garage would have to be controlled and properly compacted but also you are likely to use a number of piers here. It is not only slab itself but also footings details which will be important but a lot will also depend on the weight of your house - will it be lightweight framed house or you are planning to have bricks? Rafted slab will be more suitable for sloped split level on M class soil. You would need to do retaining walls between your slab layers with agg drainage, gravel backfill and waterproofing - have you decided which material you will be using? Dincel probably would the be the most cost effective option here which will cost around $220-230+GST per sqm in NSW supply and install but without backfill and drainage, so roughly $2.5K will be just on walls. You would also need to set up and connect perimeter drainage to prevent water pooling under the slab as your first step after excavation is done. I estimate $300+/sqm all in if you want to do it right, but would be really interested to know what your builder comes back with. Re: Concrete Split level Slab costs 3May 28, 2020 7:34 am Hey mansfieldqld Thanks for the rough sketch Here's an example using 3D Bim Engineering, Class A,3 split level, 2 Storey hose, Slab and Formwork Cost, the footing dimensions are 500w x 300d I recommend you have it properly Independently engineered/modelled and the Building information costed The step up in concrete ( excuse the pun) from Class A to Class M roughly doubles, eg say 20 to 40m3 In a nut shell you need your Build Quantities...Tip, start asking questions from that point Cheers Chris Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Concrete Split level Slab costs 5May 28, 2020 12:41 pm gogo65 It’s the drop edge beams that cost and also depends on span of the split. We have a 30m split 600mm drop. It will be impossible to achieve waterproofing for drop edge beams unless they use concrete which is already waterproof, e.g. with RadMyx in it. But then agg drainage/back fill issue will arise. Drop edge beams are pretty common option though when they are facing outside, not inside. For inside you would need proper retaining wall. Re: Concrete Split level Slab costs 6May 30, 2020 9:05 pm Thanks for the feed back. Most likely would be brick construction. Hasn't really considered light weight. I always associated that with painting. The long side faces West so thought brick face with enhanced cavity ventilation would minimise maintenance. I'll certainly will ask more specific questions with regards to waterproofing etc. Lots to learn and sort through. Re: Concrete Split level Slab costs 7May 30, 2020 9:19 pm alexp79 1 m fill under the garage would have to be controlled and properly compacted but also you are likely to use a number of piers here. It is not only slab itself but also footings details which will be important but a lot will also depend on the weight of your house - will it be lightweight framed house or you are planning to have bricks? Rafted slab will be more suitable for sloped split level on M class soil. You would need to do retaining walls between your slab layers with agg drainage, gravel backfill and waterproofing - have you decided which material you will be using? Dincel probably would the be the most cost effective option here which will cost around $220-230+GST per sqm in NSW supply and install but without backfill and drainage, so roughly $2.5K will be just on walls. You would also need to set up and connect perimeter drainage to prevent water pooling under the slab as your first step after excavation is done. I estimate $300+/sqm all in if you want to do it right, but would be really interested to know what your builder comes back with. I'll look at Dincel. Seems a good idea. I've had figures of $1000/m thrown at me for the 1m step. I'll have to clarify if that relates to additional compacting or not but that's 3x your estimate. And a machine onsite for an extra hour or 2 so wouldn't cost that much as it's already onsite. You can tell when a Builder isn't confident... Say of building on a slope... And therefore budget for their unknown costs.... And builders who see $$$ and see if you're gullible. Re: Concrete Split level Slab costs 8Aug 08, 2020 2:21 pm Every block (i.e. fall/slope) will be different and require different structural piers and beams to support the structure on challenging building platforms. In my eperience (whether it helps or not) building a split level on a block with a 1.5 meter fall front to back, ended up costing me around $16K for the split (i.e. higher ceilings at the back half of the house 3.2m versus 2.7m at the front of the house) giving me a 500mm step down (3 step)... Additional slab costs were around $26K which included around 50 piers/screw piles and some cut and fill activity and the inclusion of deepend edge beam . Again this will differ for every build. Move your linen into laundry and access laundry from your present linen space 1 8503 The concreter will take and reuse. In my case I bought structural LVLs and scraped them back and used them as joists. 1 5859 yep, clearly mark where the infloor heating pipes are before drilling or nailing 1 6375 |