ᐅ Laminate Flooring on a Flexible Subfloor

Created on: 27 Aug 2022 22:26
S
SabineW
Hello, during the renovation of our house, the following issue came up today: after removing the carpet in the attic room, we noticed that the floor is uneven and flexes. We would like to install laminate flooring there. Does anyone have experience with whether laminate can be installed in such conditions, or is there a risk that it will crack? We were planning to level the unevenness with self-leveling screed. Any advice would be greatly appreciated! Many thanks in advance and best regards
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guckuck2
8 Dec 2022 13:58
I feel somewhat addressed 🙂

There are suitable leveling compounds for wooden floors, such as Baumit Extrem. I neglected to mention that these must be applied on a solid, non-flexible subfloor, but this is also stated in the application instructions. I assume that when Sabine was at the specialist store, she got something appropriate in hand that is not self-leveling screed – which was the original plan.

Therefore, I would like to assume that Sabine has successfully completed the renovation in the meantime.
KlaRa8 Dec 2022 16:31
guckuck2 schrieb:

I feel somewhat addressed 🙂

There are suitable leveling compounds for wooden floors, such as Baumit Extrem. That these need to be applied on a solid, non-flexing subfloor, I regretfully did not mention, but this is also clear from the application instructions. I think if Sabine visited a specialty store, she must have received something appropriate that is not self-leveling screed – which was the original plan.

Since unintentional incorrect recommendations of a private nature due to technical ignorance are not subject to legal prosecution anyway, there can be no criminal relevance in this area of the forum. This related remark was therefore unnecessary.
However, Sabine mentioned that the wooden subfloor is uneven and flexible.
For a professionally useful recommendation, all known aspects must be considered.
It should be beyond doubt that the user must also follow the manufacturer’s application instructions.
Only with some “technical foresight” can one recognize that movements in a wooden subfloor will always continue.
Therefore, it is not enough to simply level the unevenness; a durable, functioning system must be recommended.
This means: loose, moving floorboards or panels must be fixed securely!
If this is not possible at all, one must accept the unpleasant task of completely removing the floorboards so that, after leveling the upper surface of the joists, a flat usable surface (or subfloor, as it is also called) can be created.
Simply leveling with highly polymer-modified leveling compounds should and cannot be used to correct subfloors that are not ready for installation.
But I admit that, due to my professional experience, I tend to assess such situations with broader insight than someone not specifically familiar with the matter might. In this respect, this time addressed to “guckuck2”: “No hard feelings”!
Questioners in this forum should just avoid falling into traps – even those unintentionally set.
Greetings to all: KlaRa