Hello,
Our screed has now been heated for 6 weeks. I am planning to lay the tiles soon with my father, but before that, I need to check the residual moisture in the screed.
What is the current state of technology? Is it best to borrow a CM meter somewhere, or are other methods like impedance or conductivity now reliable as well? For example, Conrad offers a device that supposedly measures moisture in screed with a tolerance of only ±0.5%, which would be sufficient for me.
Best regards
M.
Our screed has now been heated for 6 weeks. I am planning to lay the tiles soon with my father, but before that, I need to check the residual moisture in the screed.
What is the current state of technology? Is it best to borrow a CM meter somewhere, or are other methods like impedance or conductivity now reliable as well? For example, Conrad offers a device that supposedly measures moisture in screed with a tolerance of only ±0.5%, which would be sufficient for me.
Best regards
M.
@ "Nordlys":
At first, "bvlgari" did not mention a screed from PCT-Chemie. So it is likely that a standard cement-based screed is installed in their building.
Screeds with additives are not standardized screeds and must therefore be considered special solutions. This also applies to RETANOL(®) screed.
This means that not only the type and method of moisture measurement but also the limit values differ from what we know and must adhere to for standard screeds.
For example, CM (calcium chloride) residual moisture measurement on RETANOL(®) screeds is only possible following the special CM measurement instructions for this screed type.
Who knows these? No one! So: consult the screed installer, who would be the contact person here (unless the screed was installed separately).
According to PCT-Chemie as the manufacturer, moisture measurements of Retanol screeds with electronic measuring devices also lead to unreliable results, partly due to the use of electrical indicator testing devices. This is at least understandable to me!
You see: the topic is not that simple!
-----------------------------------
Regards: KlaRa
At first, "bvlgari" did not mention a screed from PCT-Chemie. So it is likely that a standard cement-based screed is installed in their building.
Screeds with additives are not standardized screeds and must therefore be considered special solutions. This also applies to RETANOL(®) screed.
This means that not only the type and method of moisture measurement but also the limit values differ from what we know and must adhere to for standard screeds.
For example, CM (calcium chloride) residual moisture measurement on RETANOL(®) screeds is only possible following the special CM measurement instructions for this screed type.
Who knows these? No one! So: consult the screed installer, who would be the contact person here (unless the screed was installed separately).
According to PCT-Chemie as the manufacturer, moisture measurements of Retanol screeds with electronic measuring devices also lead to unreliable results, partly due to the use of electrical indicator testing devices. This is at least understandable to me!
You see: the topic is not that simple!
-----------------------------------
Regards: KlaRa
Thank you. Conclusion. It’s not that simple. A retanole screed does not fall under common standards. So, what shall I do, Sir? Nothing. Rely on the contractor and trust that they know what they’re doing because they always pour this type of screed. I let them lay the tiles without protest. Karsten
@ "Nordlys":
A screed that does not meet the standard requirements is always a special case. However, special solutions in construction must be agreed upon with the client, who should be informed that such screeds lack long-term experience. This allows the client to decide whether to accept the order as a special solution or not.
If everything is carried out quietly by the contractor, the work is considered defective, regardless of whether it functions or not.
However, if the client closes their eyes, relies on luck, and takes responsibility for the tiling work, they implicitly confirm the correctness of the (screed) installation, along with any disadvantages that may arise later. By doing so, they also assume the risk—especially in cases of excessive residual moisture in the screed—of total damage to the screed. I have seen such screeds frequently in my professional experience.
"I’ll just tile over it" is an understandable reaction of defiance, but you should be fully aware of the associated risks!!
--------------------------------
Best regards, KlaRa
A screed that does not meet the standard requirements is always a special case. However, special solutions in construction must be agreed upon with the client, who should be informed that such screeds lack long-term experience. This allows the client to decide whether to accept the order as a special solution or not.
If everything is carried out quietly by the contractor, the work is considered defective, regardless of whether it functions or not.
However, if the client closes their eyes, relies on luck, and takes responsibility for the tiling work, they implicitly confirm the correctness of the (screed) installation, along with any disadvantages that may arise later. By doing so, they also assume the risk—especially in cases of excessive residual moisture in the screed—of total damage to the screed. I have seen such screeds frequently in my professional experience.
"I’ll just tile over it" is an understandable reaction of defiance, but you should be fully aware of the associated risks!!
--------------------------------
Best regards, KlaRa
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