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Hi folks, I am interested in fixing the holes and aberrations in my concrete subflooring, but I do not wish to level it. Finding any info on how to go about this is proving frustrating because literally everything out there assumes levelling.
The original concrete pour from the 70s is very uneven (~70mm over five or six metres), but this is still not enough to perceive or to cause me any problems. My far bigger priority is maintaining every possible mm of ceiling height in all cases. For this reason I would rather smooth the floor as is (ie fill the holes but not worry about the gradient), and therefore happily forego the warranty of the vinyl planks I put down, and avoid spending thousands of dollars on leveller I don’t want.
As you can see in the photo there are some very large holes that need smoothing over. Is some sort of leveller still the best product for this (ie can it be manipulated to stay just in the regions I want it) or would it slowly make its way to the lowest point of the floor when I leave it to set? Would another product be better?
Hi @OneMansFool,
You'd prbably be looking for a repair mortar rather than a self-leveller if you just want to do a skimcoat to fill the depressions. I'd recommend using something along the lines of Dunlop 5kg Ardit Rapidset Repair Mortar.
The issue with patching areas and not doing a self-leveller over the entire floor is that it will be quite lumpy and uneven. This unevenness will be transferred through your vinyl planks. You might like to go for Hybrid Vinyl planks instead of adhesive-back planks, as they have an additional thickness, which will help mask the floor discrepancy.
Please let me know if you have any questions.
Mitchell
That's great to hear @OneMansFool. Keep us updated, and reach out if you need further assistance; we're here to help.
Mitchell
