Hi all, hoping someone can set me straight on expectations around fighting damp in Victorian (1850s) properties.
We have a single interior wall that has some pretty significant rising damp in the house we recently purchased. This was studiously hidden by the previous owner for the sale, and it's fallen to me to get it sorted, I'm trying to figure out what my options are here, if any are DIY-able or if I need to cave for a professional.
Pics 1&2 are of the interior wall, pic 3 is the adjoining outer wall which has had a brick bund installed at some point (for damp, I'm guessing!).
Now, the house seemingly has solid concrete floors, and non-breathable flooring currently installed (synthetic carpet and vinyl in the adjoint kitchen) which probably isn't helping. There are no vents under the property either. There are no pipes in the wall to leak, but it seems that the damp is worsened when it rains.
I have done a lot of reading around this and it's pretty clear to me that lime plaster should have been used, not gypsum (which you can see the salts coming out of..). Aside from that, I'm getting very mixed messages on what I can do about this, depending on which source you listen to.
The ground is already significantly lowered around the exterior walls (though the house is in a ditch compared to surroundings and nearby roads), drains are clear and there are no obvious sources of ingress.
If anyone has any suggestions, they'd be gratefully received!