Cob Floors Over Existing Flooring

We have some pretty nasty vinal floor tiles I half expect might contain asbestoses. We have already decided removing it would probably be worse for us then just encapsulating it. Under the tiles there's the original 120 year old wood flooring but it would need some heavy work even if we scraped off all the tiles. I tiled over the entryway of the house with reclaimed slate where the most water would get tracked in but was wondering if I could grout the tiles with cob and just coat the rest of the  floor in cob. Im not worried about weight, the place is built like a brick. But I don't know how thick to make the cob layer and if cobbing over the old flooring would cause any unforeseen problems. Do I just seal it with oil and reapply when it looks likes it needs it?

Sam, do a search of this site, I remember reading abour a similar topic in the past. Good luck with it.
It may not be too hard to remove the vinyl anyway with appropriate protection or help.

How cob would stick to vinyl? It would peel off perfectly after drying.
It's the best to use compatible materials, so if you have wooden floor under the vinyl, I would do everything to expose it, sand it and oil it or use some other finish. Old wood almost always looks great when properly finished.

chritobel, there is a possible problem with asbestos

I took a look without much luck to see if there was any similar post but I am not always great at navigating the site so it is probably around somewhere.

If just stripping it to the original floor was a easy option I would. If we were planning on staying here forever I think it would be worth it to! Luckily the hallway and bedrooms were spared and there is still some gorgeous wood that just needs to be uncovered and loved!  

I figure the floor is going to be covered either way so Il run a few test patches and see if it works. The mortar stuck to the vinyl, it might have a good shot! lol The cob is free as well and if it needs patched like twice a year what's the harm? Using it as grout for the tiles should be more then safe to try.

Should I go thicker if I'm worried about cracking? Or dose it matter much?