ᐅ Foundation incorrectly positioned – what is the recommended course of action?
Created on: 19 Apr 2022 19:47
L
lars909
Hello everyone,
Unfortunately, during our new build today, we discovered that the foundation was positioned incorrectly on the plot. The concrete slab has not been poured yet. Because an incorrect boundary marker was assumed, the foundation formwork is located 3 meters (10 feet) too far back on the property. We briefly considered accepting this and submitting a new building permit/planning permission, but ultimately decided against it due to the lack of a garden.
The site manager immediately admitted the mistake. The plan now is to move the foundation forward by 3 meters (10 feet). From what I understand, a section will be added at the front and connected to the rest. At the back, another new section will also be added and connected—the 3 meters (10 feet) of overlapping “remainder” can stay, according to the site manager, as a terrace at the level of the sliding door is planned there anyway. The wastewater pipes and other utilities will, of course, also be relocated.
I am a layperson and honestly relieved that the concrete slab hasn’t been poured yet. However, I am wondering if this is the correct approach. Or should everything actually be removed and redone? I don’t want to cause unnecessary work and am satisfied with a reasonable solution. What is structurally sound and acceptable in such a situation? How is something like this typically handled in practice?
Good luck
Unfortunately, during our new build today, we discovered that the foundation was positioned incorrectly on the plot. The concrete slab has not been poured yet. Because an incorrect boundary marker was assumed, the foundation formwork is located 3 meters (10 feet) too far back on the property. We briefly considered accepting this and submitting a new building permit/planning permission, but ultimately decided against it due to the lack of a garden.
The site manager immediately admitted the mistake. The plan now is to move the foundation forward by 3 meters (10 feet). From what I understand, a section will be added at the front and connected to the rest. At the back, another new section will also be added and connected—the 3 meters (10 feet) of overlapping “remainder” can stay, according to the site manager, as a terrace at the level of the sliding door is planned there anyway. The wastewater pipes and other utilities will, of course, also be relocated.
I am a layperson and honestly relieved that the concrete slab hasn’t been poured yet. However, I am wondering if this is the correct approach. Or should everything actually be removed and redone? I don’t want to cause unnecessary work and am satisfied with a reasonable solution. What is structurally sound and acceptable in such a situation? How is something like this typically handled in practice?
Good luck
11ant schrieb:
I find the idea, to put the strip thickening and the flat part of the slab in separate construction phases, to be, to put it mildly, "unusual".There is nothing unusual about it. I just say: frost protection strip!
ypg schrieb:
There is nothing unusual about it.
I only say: frost skirt! Well, I would definitely connect that one seamlessly!
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
11ant schrieb:
Well, I would install those seamlessly!Yes, but those are two separate tasks.However, the frost skirt will be insulated, which is questionable given the unnecessary strip footing under the future patio. My goal would be to have this excess removed. The cut reinforcement bars need to be sealed. Or at least thermally separated (with a wide cut) and compensated by pouring a slab for the patio, if ceramic tiles or similar flooring are planned.
11ant schrieb:
So by "the slab not yet poured," you mean the large surface part of the slab, but the strips already exist?
Aside from the fact that they are probably positioned incorrectly now (I assume your house layout does not follow a 3m (10 feet) structural grid), I find the idea—putting the strip reinforcements and the broad slab section in separate construction phases—, to say the least, unusual. I still have no idea what formwork blocks are doing in the whole story. Maybe you should illustrate this nonsense first before we continue discussing the mess 🙂 I thought I knew little, but what you're saying here... Just please stop, that’s enough by now ;-)
gutentag schrieb:
@lars909
Honestly, if the string line framework is set up, wouldn’t a deviation of 3 m (10 feet) be noticeable?
Are there really no pictures of this mess? That should be the minimum for documenting evidence.Absolutely right. It shouldn’t have happened, but it did.Thank you very much for all the helpful contributions (except for 11ant). Truly, you have been a great help, this is not something you do every day. We will probably have the existing foundations torn down and start over. The option calculated by the structural engineer is supposedly faster, requires less effort, and is also verified, but we just feel uneasy about it.
Frustrating, but probably the best solution.
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