Damp where chimney removed, and behind K Rended wall

The problems with old houses are they are built with lime mortar. This allows them to breathe, the internal walls are usually lime plaster this again allows the walls to breathe. Modern materials and older materials do not generally work to well together, anything that stops the walls breathing like cement based products tend to keep the water in the wall rather than allow it to escape naturally. If the outside walls have been repointed with cement, this can allow water to get trapped in the wall, as there is no cavity, it will allow water transfer from the external to the internal walls. Would have re-pointed it with a lime mortar rather than a render or if render was a must, would have used a lime render as any water getting in behind the render will now be trapped in the wall and must come out somewhere. Most older materials are still available although more expensive, getting someone who knows how to apply them might be a tad harder to find. Lime mortar is 3.5 or above hydralic lime with no additives or cement, it is not hydrated lime which can be purchased at any builder/diy merchants. Without looking at the issues it is not really possible to say if you actually did have rising damp as it is misdiagnoised in over 70% of cases and seldom works in solid brick buildings. Good luck Alex

Im sorry to say but the krend will just make it worst, you must use a lime based render to allow the walls to breathe