ᐅ Could this be asbestos?

Created on: 21 Nov 2020 14:25
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Gette094
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Gette094
21 Nov 2020 14:25
Hello everyone,
the following pictures show an adhesive layer underneath carpet and vinyl flooring that was found in our renovation project.
Of course, we will have samples analyzed in a laboratory.
However, I would like to ask about your experiences with asbestos and such adhesives... Does it look like asbestos to you? The texture is extremely hard and brittle.

Thank you very much for your support!

Braunes, verkratztes Bodenmaterial mit Kreuz- und Geradenlinien, Loch links, weißem Pulverfleck.


Nahaufnahme einer Holzoberfläche mit kleinem dunklem Rundloch und deutlicher Holzmaserung.


Holzfußboden mit kleinem runden Loch, umrundet von dunklem Staub und Erde.


Beschädigte Innenwand und Boden, abgeblätterte Tapete, Feuchtigkeit im Eckbereich.
11ant21 Nov 2020 16:23
I recognize the pictograms for "sofa" and "bed" – so we are apparently looking at the back side of a carpet recommended for living rooms and bedrooms (I cannot interpret the other pictograms). This carpet was likely fully glued down with a liquid adhesive. Carpet backings contain plastics (foam materials), whose plasticizers naturally change over time. To my knowledge, asbestos is not found in any rollable materials; it consists of fibers that, apart from being much smaller, can be imagined similar to those in particle boards. Exposing asbestos on such a large area without respiratory protection would make it impossible to spend more than a few minutes without developing noticeable lung irritation.
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https://www.linkedin.com/company/bauen-jetzt/
Nida35a21 Nov 2020 17:19
Heat gun, melting the adhesive, spatula for scraping—all with the window open
11ant21 Nov 2020 23:03
Nida35a schrieb:

Hot air gun, melting the adhesive,
I'm not sure if this is a good DIY tip or maybe a guide for creating a "smoldering fire" by yourself (?)
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Nida35a21 Nov 2020 23:48
I would feel safer using hot air at 200°C (392°F) than sanding, as even respirator masks with a 10 micron filter range let smaller particles through.
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Gette094
22 Nov 2020 00:00
Thank you all for your responses!
The black material turned out to be mastic asphalt (asphalt screed). I forgot to mention that we plan to remove the screed in order to install underfloor heating afterward.

Now about a new building material:
The brown layer is fibrous and seems to be an insulation material, while I suspect the thin gray layer is asbestos board.

What do you think?

Broken concrete piece with gray surface, brown intermediate layer, and black edge.