What is this under the parquet? (pictures)

[PASwe]

Hello!

Today I pulled up the parquet in the living room and found some sort of leveling compound instead of step soundproofing paper or whatever I had expected.

The layer is 3-5 mm thick and has over time begun to disintegrate into a powder that feels like very fine sand. Does anyone know what they might have used? And if so, if it's dangerous. It looks like the substance is fiber-reinforced and I am naturally worried that it might be asbestos.

 

[Lehtin]

Could it be remnants from an old carpet?
Reminds me of how it looked when I tore out flooring last.

 

[PASwe]

The floor was laid in 1973.

 

[PASwe]

Could it be remnants from an old carpet?
Reminds me of what it looked like when I last tore out flooring.

No, it's clear that it's a leveling compound.

 

[13th Marine]

Also think it looks and behaves just like remnants from an old carpet. Had something similar when I tore up an old parquet floor last winter, it was yellow instead. The plastic mat remnants in my case were from '71.

 

[Liteavvarje]

Is it loose or fixed
Had something similar under a glued carpet, had to scrape the entire floor with a knife, couldn't do it mechanically,
in older days there were glued carpets with an asbestos layer underneath in woven form but the color was grayish, not black

 

[PASwe]

Thank you for your interest.
It is solid but porous, and one can easily crush it into a fine powder.

I am doubtful that it is remnants of an old rug because you can see that it was poured or spread at one time. I am also convinced that this parquet has been here since '73.

I realize that I need to send a sample for analysis.

 

[13th Marine]

The plastic mat was glued from the start, the stripes are from the glue. When the plastic mat was pulled away, it split instead of detaching completely from the surface.

I need to remove everything to be able to evenly fill the entire floor, ended up having to rent a wall sander and go over it by hand, the ABS sander I rented first couldn't handle it.

 

[Liteavvarje]

Could be some kind of filler to not see joints between boards or panels, I haven't seen anything like what you're showing, a tip, take it with you and go into a big carpet store, they probably know what it is and it doesn't cost anything.

 

[PASwe]

Thanks for the tip about consulting a carpet company!

 

[A-Man_08]

Guessing on damping material that was glued down before laying the floor.

 

[AndersS]

That's what it looked like when I removed a 70s carpet, but it was gray and not black. And as noted, you can see the strokes from the adhesives.

 

[PASwe]

I have now received the test results and fortunately, it did not contain any asbestos. I want to thank you for your commitment and I will get back to you if I figure out what it was.

 

[Prettuchaos]

Have the same powder, from what it looks like in the pictures, under a wooden floor on the upper floor of a house from '72. Leveling compound seems to be the hottest suggestion, right?