Hi, thanks for the replies so far. I mean Monocouche made by Weber and Krend. I have read that if these products crack they are difficult to fix without the repair being seen i.e lots of work. My house is pretty old (1908) and some of the areas of the wall are a little little live (cavity wall old ties). I have fixed them best I can, don't really want to take the wall down and fully rebuild it, can of worms!. My question is..........what is stronger for the wall, traditional sand and cement or one of these monocouche type renders. The mono maybe more flexible and forgiving regarding movement, but is it as strong as a well plastered sand and cement render. Also other than using SBR on the wall before sand and cement is spread can you use fibre glass mesh in your first pass inbedding in the sand and cement or is it better to use stainless steel mesh? Thanks!