ᐅ Concrete slab poured too large – it has now been cut down – is this acceptable?
Created on: 1 Oct 2020 09:22
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Sporttasche
Hello dear experts,
We are just at the beginning of our build, and already the first issue has occurred. The concrete slab was poured too large! It’s actually surprising how something like this can happen, but it did (by the way, the slab was done by a very well-known company).
The slab is 16 cm (6.3 inches) too long on one side, and this also affects a recess for the bay window.
This was noticed during the slab inspection. We were told that it can happen (which was visibly embarrassing for the site manager) and that they would fix it. Yesterday, the slab was "cut back" by the mentioned 16 cm (6.3 inches). They used a type of cutting disc similar to those used in road construction to grind the slab. Since the slab is much thicker than the cutting depth of the disc, the rest was painstakingly removed with a pneumatic hammer. The area was then re-plastered.
Well, apparently everything is fine now, which I really hope is true. I am not an expert, so I would like to hear the opinions of professionals here.
In my view, it can’t be as good as if it had been poured correctly. Here, a component was opened up and patched. The frost protection edge (frost skirt) that was originally 50 cm (20 inches) is now only 34 cm (13 inches) high (they say a maximum of 20 cm (8 inches) is needed and that it’s always 50 cm (20 inches) because the excavator’s bucket makes 50 cm (20 inches) wide trenches).
I’m already upset that the build started like this and I really hope we won’t have problems because of it down the line.
Which expert can give me some advice on this topic? Thank you!
P.S. By the way, it’s a KFW40+ house with a matching slab.
We are just at the beginning of our build, and already the first issue has occurred. The concrete slab was poured too large! It’s actually surprising how something like this can happen, but it did (by the way, the slab was done by a very well-known company).
The slab is 16 cm (6.3 inches) too long on one side, and this also affects a recess for the bay window.
This was noticed during the slab inspection. We were told that it can happen (which was visibly embarrassing for the site manager) and that they would fix it. Yesterday, the slab was "cut back" by the mentioned 16 cm (6.3 inches). They used a type of cutting disc similar to those used in road construction to grind the slab. Since the slab is much thicker than the cutting depth of the disc, the rest was painstakingly removed with a pneumatic hammer. The area was then re-plastered.
Well, apparently everything is fine now, which I really hope is true. I am not an expert, so I would like to hear the opinions of professionals here.
In my view, it can’t be as good as if it had been poured correctly. Here, a component was opened up and patched. The frost protection edge (frost skirt) that was originally 50 cm (20 inches) is now only 34 cm (13 inches) high (they say a maximum of 20 cm (8 inches) is needed and that it’s always 50 cm (20 inches) because the excavator’s bucket makes 50 cm (20 inches) wide trenches).
I’m already upset that the build started like this and I really hope we won’t have problems because of it down the line.
Which expert can give me some advice on this topic? Thank you!
P.S. By the way, it’s a KFW40+ house with a matching slab.
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borderpuschl7 Oct 2020 11:32Sounds good.
I would still quickly double-check the important connections. It’s not complicated and you can verify them using the plan. From my experience, measurements are always taken from the shorter side to the outer edge. You wouldn’t want your drain to end up halfway inside the wall or 16cm (6 inches) in front of it.
I would still quickly double-check the important connections. It’s not complicated and you can verify them using the plan. From my experience, measurements are always taken from the shorter side to the outer edge. You wouldn’t want your drain to end up halfway inside the wall or 16cm (6 inches) in front of it.
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Sporttasche8 Oct 2020 11:08There are no pipes in the rear area, only the grounding rods. However, these should be within the tolerance range. I will double-check the measurements to be sure.
Is a "cut-off" slab actually worth the same price as if it had been done correctly from the start?
Is a "cut-off" slab actually worth the same price as if it had been done correctly from the start?
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Sporttasche8 Oct 2020 13:14FloHB123 schrieb:
You do have the written statement from the structural engineer confirming that everything is fine and no issues are expected. From what I understand, the defect has been fixed.
So why don’t you want to pay the full price now? I never said that I don’t want to pay. My question was whether the foundation slab in its current condition is worth the full price.
For example, a repainted new car is not worth the original purchase price—so please allow me this question here.
Sporttasche schrieb:
I never said I didn’t want to pay. The question was whether the foundation slab in its current condition is worth the full price.
For example, a newly painted car is also not worth the full original price – so please allow me to ask this question here.Then ask if you can get the foundation slab cut off at 16 cm (6 inches)
So, if scratches in the paint are professionally repaired before the delivery of a new car (if necessary by replacing the affected parts), you will most likely not receive a discount. Instead, the defect will simply be kept undisclosed. After all, it is still considered a new car without defects.
So, I don’t see any reason to withhold anything here.
So, I don’t see any reason to withhold anything here.
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