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Damp in a rubble built cottage wall.

  • 05-06-2019 10:09pm
    #1
    ando2891
    Registered Users, Registered Users 2 Posts: 14 ✭


    I have a damp problem in a rubble built cottage wall that I’m looking for opinions on how to sort out. The cottage was renovated in the last 6 years and During this the old floor was removed and re-screeded and also lowered by 3 to 4 inches. This left a gap in the plaster around the bottom of the walls right around the room, someone in they’re infinite wisdom filled this with a gypsum based plaster, which has soaked moisture from the wall.
    I’ve removed the gypsum plaster as you can see in the pics which has exposed the stone in the wall but also large cavities under the stones can be seen, I’m looking suggestions as to where to go from here? Pour sand and cement with waterproofer into the wall now to stabilise it then plaster with a sand and cement? There’s places I can get my hand into and touch the subsoil the wall is built on!

    All suggestions welcome!!! Thanks!


Comments

  • #2
    Calahonda52
    Registered Users, Registered Users 2 Posts: 13,155 ✭✭✭✭Calahonda52


    What is the external finish on the wall?
    how do you know u are down at the wall foundation?
    Is this problem right throughout the house?
    Have u a french drain around the house?
    where is outside ground level relative to the FFL inside?

    “I can’t pay my staff or mortgage with instagram likes”.



  • #3
    mickdw
    Registered Users, Registered Users 2 Posts: 23,795 ✭✭✭✭mickdw


    It sounds mad that someone would lower the floor level in that way. It was asking for trouble but seeing what they put in there, it was a cowboy effort anyway.


  • #4
    Lumen
    Registered Users, Registered Users 2 Posts: 31,232 ✭✭✭✭Lumen


    Adding more sand and cement to fix a problem partly caused by sand and cement seems like a bad idea. Even if you manage to effectively tank the paddling pool that's been created, you might still get penetrating damp through and under the base of the wall and then it has nowhere to go. So then you might try to stop penetrating damp on the outside, but if you're not careful you'll have completely ruined the performance of the building.

    The obvious but expensive answer is to restore the building fabric to the original design and then improve the energy performance using appropriately vapour-open materials.

    I'd get professional advice from someone qualified in the repair of old buildings.


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