Damp Proofing

Lime render or Sand and Cement

Anonymous user 14/03/2024 - 2.31 PM

Hi there. I have a 1890's terraced house which has had a chemical damp proof course injected twice (once in 1985 and then redone in 1997). I purchased the property and hacked off the damp plaster (which I believe was Carlite and Gypsum) back in May. I was advised by a historical building surveyor to open the chimneys up, lower the patio and ventilate the property which I have done. He also advised to put lime render back on, and I have had conflicting advice as what to do next. My walls have dried a bit, and it doesn't smell of damp (although it never did). I was advised by the historic building surveyor to not bother with chemical damp proof again as it doesn't work and to put a lime render back onto the walls to allow the bricks to breathe, but I have also been advised to put sand and cement on with a damp proofing chemical mixed in with it. The damp is on the external walls in the back dining room (where there is a concrete floor which has a plastic membrane underneath) but also on an internal wall in the living room between the hallway - the living room has a wooden floor but the hallway has a concrete floor (which is also lined with a plastic membrane). Any advice would be really appreciated? Thank you