Hi
I have cement render on the external walls of a downstairs kitchen bathroom. The render reaches the floor. The floor had been raised past the DPC. I'm creating my own version the zebcolm trench to lower the external floor level. My next task was to try and dry out the walls by removing the cement render. I had done this internally in another part of the house, before being lime plastered, so I knew to go slowly. I chose an area which already had cracks in the render as weak spot to start with the SDS. One short blast and the render fell off in a big lump. I expected the face of the brick to have gone, as that’s the beauty of cement. What I didn’t expect, was that someone had removed something else previously to apply the cement render. They seem to have gone quite deep (as shown in the photo). I'm unsure what to do next. Keep removing and hope I can find a lime renderer in my part of the world (South Wales)? Stop and accept that due to someone else’s work that its best to cover over this and the drop in floor levels resolves the damp in the walls? Or see if I can find a professional to do both (cost allowing)? This wall also has a gas boiler internally. The brick on the left, sticking out further than the others, is the corner of the building. Not sure why?

I have cement render on the external walls of a downstairs kitchen bathroom. The render reaches the floor. The floor had been raised past the DPC. I'm creating my own version the zebcolm trench to lower the external floor level. My next task was to try and dry out the walls by removing the cement render. I had done this internally in another part of the house, before being lime plastered, so I knew to go slowly. I chose an area which already had cracks in the render as weak spot to start with the SDS. One short blast and the render fell off in a big lump. I expected the face of the brick to have gone, as that’s the beauty of cement. What I didn’t expect, was that someone had removed something else previously to apply the cement render. They seem to have gone quite deep (as shown in the photo). I'm unsure what to do next. Keep removing and hope I can find a lime renderer in my part of the world (South Wales)? Stop and accept that due to someone else’s work that its best to cover over this and the drop in floor levels resolves the damp in the walls? Or see if I can find a professional to do both (cost allowing)? This wall also has a gas boiler internally. The brick on the left, sticking out further than the others, is the corner of the building. Not sure why?

