what is the purple-grey stuff on wall!???

t45

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27 Dec 2013
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Surrey
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United Kingdom
Hello,
I would be grateful for any advice.
I am working on the walls in one of my rooms, removing wallpaper that seems to have been on the walls for many years.
The wallpaper is white with a brown backing – I have stripped this off using a combination of steaming and scraping.
I was wondering was, having removed the white paper and the brown backing paper (is this what it is called?), what is the purple/greyish stuff underneath this? I don’t think it is plaster because I can actually take strips of this off very easily. Some is stuck to the walls and other bits just come off in large strips. Is this a type of paper that has to be used on certain walls – the property is quite old – around about 1910, is this purple/greyish paper something that I could replace?......it doesn’t feel like wallpaper and doesn’t look like wallpaper – to me it resembles a mixture of strong paper/thin card-like stuff....but it comes off quite easy.
Is this a covering that is put over plaster or a sealant or some kind?
I have not had to remove any adhesive or glue – I did quite a bit of scraping.
Also, is it a good idea to re-plaster old walls, having removed all paper and if I should also remove this purple-grey stuff?
What would be the process having removed everything. Do I wash the walls, sand them to make smooth and fill or do i just leave the old plaster for the plasterer to remove? I would love to be able to do the job myself but being a novice i don’t think to would be a good idea!
Thank you,
:)
 
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No idea what it is, but yes, it would be a good idea to have the walls re-skimmed. But get all the loose stuff off first.
 

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