ᐅ Newly installed patio with concrete paving slabs – is this normal?
Created on: 3 Aug 2018 00:22
G
Gatho
Hi!
Our builder has finally started work on the terrace. Completion is imminent.
Now, with the middle slabs, the following situation has appeared (see photos).
According to the installer, this can happen occasionally... it is a chemical reaction and the appearance issue should fade after a few months. Unfortunately, I don’t have any knowledge about this.
What is your assessment? Is this normal? Will it go away, or is this clearly a defect and the slabs need to be replaced?
The stain in the close-up photo was treated by me with water and a sponge – but it didn’t help.
I would appreciate a prompt response.
Good luck & thanks!
Our builder has finally started work on the terrace. Completion is imminent.
Now, with the middle slabs, the following situation has appeared (see photos).
According to the installer, this can happen occasionally... it is a chemical reaction and the appearance issue should fade after a few months. Unfortunately, I don’t have any knowledge about this.
What is your assessment? Is this normal? Will it go away, or is this clearly a defect and the slabs need to be replaced?
The stain in the close-up photo was treated by me with water and a sponge – but it didn’t help.
I would appreciate a prompt response.
Good luck & thanks!
Hello Gatho
This is (unfortunately) quite normal and not a reason to complain :-(
Concrete is cast in molds at the factory and, after hardening, usually not fully dried (not the full 28 days) before being packaged in plastic wrap. Excess water then accumulates and causes these efflorescence marks. I have the same issue on some of the concrete slabs of our newly installed terrace. It almost always occurs on the first layer of the pallet. It should gradually wash away over time (rain). If needed, you can try a special stone cleaner. You might want to contact the supplier or manufacturer of the concrete stones to see if they offer such a product.
Best regards
This is (unfortunately) quite normal and not a reason to complain :-(
Concrete is cast in molds at the factory and, after hardening, usually not fully dried (not the full 28 days) before being packaged in plastic wrap. Excess water then accumulates and causes these efflorescence marks. I have the same issue on some of the concrete slabs of our newly installed terrace. It almost always occurs on the first layer of the pallet. It should gradually wash away over time (rain). If needed, you can try a special stone cleaner. You might want to contact the supplier or manufacturer of the concrete stones to see if they offer such a product.
Best regards
Zaba12 schrieb:
What can the patio builder do about it? You chose the stones and their quality yourselves. The patio builder doesn’t have to take responsibility. Maybe he could have warned you that something like this can happen, since as a homeowner, you’re not expected to know everything. It can happen. I’ve seen it several times and have read about it here.
Our patio will probably look similar. We’re planning a dark stone for the driveway, like Alex. The patio will be tiled to prevent this kind of issue.First of all, I’m not blaming the patio builder directly. He is contracted to do the work and acts as the executing party. He is also in direct communication with the site management. My concern is why this particular batch was installed in the first place. In our case, there is an entire separate pallet of concrete slabs as well. I believe it should have been possible to exclude that batch.
If it were just a few individual slabs, it might be easier to accept. But since over 30 slabs are affected, and they run neatly in a strip across the patio, I hope you can understand the frustration.
Gatho schrieb:
First of all, I don’t really blame the terrace builder. He receives the contract and acts as the executing party. He is also in direct communication with the site management. My concern is more about why this particular batch was installed in the first place. In our case, there is still an entire additional pallet of concrete slabs. I believe it would have been possible to sort them out.
If it were just a few individual slabs, you could probably manage it. But since over 30 slabs are affected and they form a neat strip across the terrace, I hope the dissatisfaction is understandable.The dissatisfaction is understandable. But who’s to say that after rain and strong sunlight the slabs that currently look fine won’t end up looking like that too?
H
HilfeHilfe3 Aug 2018 19:13Perfect, you have good craftsmen. Next time, put out a crate of beer.
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