Hi Guys,
Hoping for some advice.
Quick bit of back ground, old Bungalow 1920s with solid brick walls and what appears to be lime mortar. Extension added in 1960s block/cavity/ Cement mortar.
Internally everywhere has been S&C rendered then skimmed. Externally there is a peddle dash finish again seems to be S&C not lime.
We put a new floor in removing the old mixture of clay/concrete/timber. There is a bitumen DPC present (in all walls) and evidence that the majority of solid external walls (and some internal) have had bricks injected and tanking up the walls in the past (except bathroom).
DPC is well clear of the external ground level (6-12") but the external render does bridge it.
Problem
Our bathroom consits of an external wall, an internal wall that was previously an external (gable end) solid wall before the extension was added.
We noticed some damp developing at the junction of the existing external wall and old gable end and previously had salts growing from the external wall above the toliet.
Please excuse the temporary toilet plumbing!
Found the guttering directly outside the junction of the walls wasnt great and there was a crack in the dash behind the guttering. (Penetrating damp, easy fix happy days, i thought)
This has been fixed and plaster stripped off.
This was 2 weeks ago and ive had heating and dehumidifier running throughout. Brick looked to be drying out but given the recent rain its wet again. So im thinking it must be rising damp?
Looking advice on how best to tackle, Im thinking of injecting DPC (Dryzone) re-point and render with S&C + waterproofer (pink solution?) but read so many things about solid walls and lime mortar i dont know what is best to do. Would also consnider any options to insulate the external wall without too much depth.
End goal is to tile all the walls and have them stay there.
Cheers for any info Neil
Hoping for some advice.
Quick bit of back ground, old Bungalow 1920s with solid brick walls and what appears to be lime mortar. Extension added in 1960s block/cavity/ Cement mortar.
Internally everywhere has been S&C rendered then skimmed. Externally there is a peddle dash finish again seems to be S&C not lime.
We put a new floor in removing the old mixture of clay/concrete/timber. There is a bitumen DPC present (in all walls) and evidence that the majority of solid external walls (and some internal) have had bricks injected and tanking up the walls in the past (except bathroom).
DPC is well clear of the external ground level (6-12") but the external render does bridge it.
Problem
Our bathroom consits of an external wall, an internal wall that was previously an external (gable end) solid wall before the extension was added.
We noticed some damp developing at the junction of the existing external wall and old gable end and previously had salts growing from the external wall above the toliet.
Found the guttering directly outside the junction of the walls wasnt great and there was a crack in the dash behind the guttering. (Penetrating damp, easy fix happy days, i thought)
This has been fixed and plaster stripped off.
This was 2 weeks ago and ive had heating and dehumidifier running throughout. Brick looked to be drying out but given the recent rain its wet again. So im thinking it must be rising damp?
Looking advice on how best to tackle, Im thinking of injecting DPC (Dryzone) re-point and render with S&C + waterproofer (pink solution?) but read so many things about solid walls and lime mortar i dont know what is best to do. Would also consnider any options to insulate the external wall without too much depth.
End goal is to tile all the walls and have them stay there.
Cheers for any info Neil
