Hi - any help would be appreciated...
Terraced house c1901 (central property of 3), which we moved into nearly 3 years ago - our house was originally the left hand side of a pair of semis, with the now adjoining left hand house built some years after ours (c1930s). This adjoining house is approximately 30cm higher than ours (based on comparing doorstep levels). This might be important as it would place their party wall dpc above ours.
I have posted several posts in the past about the lack of underfloor ventilation & high humidity which have been partially dealt with (extra airbricks and clearing out rubble from the underfloor), but the current problem is not directly related to this. The left hand party wall has fairly recently (4-5 years) had a chemical DPC and been replastered to ~1.2m along the party wall in the front hallway. However horizontal damp stains are appearing all along at 1.2m height (see pic for an example).
View media item 96337
I presume that the chemical DPC has failed or never actually worked, and that what I can see is rising damp being forced out of the wall above the re-plastered 1.2m?
What would be the remedy for this ? Presuming I can't do anything about next door, do I need to allow this wall to breathe or go in the opposite direction and think about tanking?
Any suggestions greatly appreciated!
Terraced house c1901 (central property of 3), which we moved into nearly 3 years ago - our house was originally the left hand side of a pair of semis, with the now adjoining left hand house built some years after ours (c1930s). This adjoining house is approximately 30cm higher than ours (based on comparing doorstep levels). This might be important as it would place their party wall dpc above ours.
I have posted several posts in the past about the lack of underfloor ventilation & high humidity which have been partially dealt with (extra airbricks and clearing out rubble from the underfloor), but the current problem is not directly related to this. The left hand party wall has fairly recently (4-5 years) had a chemical DPC and been replastered to ~1.2m along the party wall in the front hallway. However horizontal damp stains are appearing all along at 1.2m height (see pic for an example).
View media item 96337
I presume that the chemical DPC has failed or never actually worked, and that what I can see is rising damp being forced out of the wall above the re-plastered 1.2m?
What would be the remedy for this ? Presuming I can't do anything about next door, do I need to allow this wall to breathe or go in the opposite direction and think about tanking?
Any suggestions greatly appreciated!