Browse Forums Building A New House Re: Concrete estimate was too low for slab 5Apr 12, 2020 9:46 pm Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Concrete estimate was too low for slab 7Apr 13, 2020 8:28 am random101 My architect has told me to pay the extra concrete in protest. From what he told me they should quote with a 10% margin of error (they quoted 76m3 in the contract) though charged for 108m3 + Margin. When I first read the contract I mentioned this as an issue as it was off on my estimate, but they said it was about right. I spoke to 2-3 previous builds and they were all under quoted for concrete. That's is why Battlers and Punters Don't use Architects nor trust builders estimates... LOL in a nut shell they cant afford mistakes. Seriously, how can the concrete estimate be 50% under? The builder would have picked up the mistake..and an unscrupulous person would have taken advantage with a lower bid.. I would make the Architect pay as he is the professional not you? REASON OT, They use 3D BIM Model renderings to sell you the project, virtually build it ? ... could'nt they have also checked the key element material quantities ie, Concrete, bricks, Roof, gyprock? Here i use the same 3D Software that architects/Builders use the difference is no body gives a sh!t on site about the renderings as we are more concerned about the engineering and what gets built on site,eg Slab and formwork Costs please excuse the rant, 3D bim tools exist to avoid costly on site mistakes, next time find an architect that knows what they are doing and never sign a cost plus contract without Engineering 3D BIM Cheers Chris Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Concrete estimate was too low for slab 8Apr 13, 2020 9:07 am StructuralBIMGuy random101 My architect has told me to pay the extra concrete in protest. From what he told me they should quote with a 10% margin of error (they quoted 76m3 in the contract) though charged for 108m3 + Margin. When I first read the contract I mentioned this as an issue as it was off on my estimate, but they said it was about right. I spoke to 2-3 previous builds and they were all under quoted for concrete. That's is why Battlers and Punters Don't use Architects nor trust builders estimates... LOL in a nut shell they cant afford mistakes. Seriously, how can the concrete estimate be 50% under? The builder would have picked up the mistake..and an unscrupulous person would have taken advantage with a lower bid.. I would make the Architect pay as he is the professional not you? REASON OT, They use 3D BIM Model renderings to sell you the project, virtually build it ? ... could'nt they have also checked the key element material quantities ie, Concrete, bricks, Roof, gyprock? Here i use the same 3D Software that architects/Builders use the difference is no body gives a sh!t on site about the renderings as we are more concerned about the engineering and what gets built on site,eg Slab and formwork Costs please excuse the rant, 3D bim tools exist to avoid costly on site mistakes, next time find an architect that knows what they are doing and never sign a cost plus contract without Engineering 3D BIM Cheers Chris Sorry I think there is a miss understanding. The builder made the quote and the contract. The architect simply notifies me I shouldn’t pay more then 10% of what they quoted. There is no contract admin. It’s a builders HIA contract. Re: Concrete estimate was too low for slab 9Apr 13, 2020 9:31 am Is it a Cost Plus or Lump sum contract HIA Online products ? As BE has mentioned building documents are a mine field to navigate without profession advice and the HIA favour Builders...not consumers Cheers Chris Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Concrete estimate was too low for slab 10Apr 13, 2020 11:34 am That’s correct. On both accounts. The HIA contract is all in the builders favour... It’s cost plus... $245m3 + 20% The going over the contract length by 5weeks which they won’t pay is another issue in itself. (Excuse is CWW changed the water connection points so they lost 3 weeks before they could do concrete drive ways). So that’s $3750 in itself. The concrete is the big one as is the LPD... Re: Concrete estimate was too low for slab 11Apr 13, 2020 2:01 pm It will save u money by getting a building inspector who understands building contracts ,I would get one yesterday,but u have to make sure the inspector u choose is highly qualified such as this forums building expert who's a Victorian. Darbbeca maybe if not in Victoria. Re: Concrete estimate was too low for slab 12Apr 13, 2020 7:40 pm If its cost plus, well then its costs plus??? Make sure he gives you delivery dockets showing the m3 used, match that with the invoice and move on. I'm very sure the builder didn't want to put more concrete in or dig up rock or excavate longer. If there is an agreed rate that you are clearly contracted to then job done. Registered Building - Always happy to help where I can and simply loves the game. DM me if you need help in VIC. Re: Concrete estimate was too low for slab 13Apr 13, 2020 9:07 pm Normally quantity of concrete used is never an issue unless there is a provisional sum adjustment Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Concrete estimate was too low for slab 14Apr 13, 2020 9:57 pm building-expert Normally quantity of concrete used is never an issue unless there is a provisional sum adjustment I've had blow outs in excavation with rock that has really thrown the estimate of the final concrete. Conventionally you can get it spot on or within reason. Registered Building - Always happy to help where I can and simply loves the game. DM me if you need help in VIC. Re: Concrete estimate was too low for slab 15Apr 14, 2020 10:57 am The matter is between owner and the builder. If builder has used more concrete than estimated that's builders risk unless it is a provisional sum and subject of adjustment. Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Concrete estimate was too low for slab 16Apr 14, 2020 3:23 pm “provisional sum and subject of adjustment.“ Which it is what it was estimated for, that amount... They removed two large rocks (which they charged for 15m3 (really about 5m3 max). So even that doesn’t translate into almost 30m3 difference. It was funny that the concreter ordered the exact right amount with almost no waste to the 1/2 truck.... From what I’m learning there doesn’t appear to be a hard and fast rule that they should’ve quoted within 10%. As they use the provisional cost to make up some cash. Rightly or wrongly. Probably has merit to argue... The LPD on the other hand is a big issue... That may or may not see the light of day. Re: Concrete estimate was too low for slab 17Apr 15, 2020 7:40 am There is a lot more to building contract adjustment (provisional sums) than you know and no one can give you the right answer until there is a proper review of your contract and the builder's claim. It seems you have not engaged your architect for contract administration The chances are you will save hundreds by DIY but drop thousands instead I have seen it so many times Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Concrete estimate was too low for slab 18Apr 15, 2020 5:07 pm building-expert There is a lot more to building contract adjustment (provisional sums) than you know and no one can give you the right answer until there is a proper review of your contract and the builder's claim. It seems you have not engaged your architect for contract administration The chances are you will save hundreds by DIY but drop thousands instead I have seen it so many times This is true, though they were charging $8k for contract admin (so a bit more then a few hundred). But would come out even if I opt to use a building inspector I'd say. I'll look at giving you a call tomorrow in any regard. Cheers Re: Concrete estimate was too low for slab 19Apr 17, 2020 8:49 am MClark building-expert Normally quantity of concrete used is never an issue unless there is a provisional sum adjustment I've had blow outs in excavation with rock that has really thrown the estimate of the final concrete. Conventionally you can get it spot on or within reason. Excavation blow out is not measured, it's builders risk. Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Thanks! I'm spoke to the builder I'm not sure if this is all true but basically went along the lines of they considered all options and if I was to compact and fill it… 2 7299 4 6201 Hi, I'd like some advice on the best option please on the estimate options we've been provided from our builder. This is for the… 0 4066 |