Hi there
please see attached photo. A hole has developed in the (I believe) sand and cement mortar o my external steps. Using drain dye I have been able to determine that rain entering through this hole is running down behind the sandstone cladding and along under the steps below causing algae to develop in the damp and obviously over the longer term will damage the wall and stairs and cladding. I believe water accumulates in that corner a bit as it gets stuck behind the return on the right hand side. I can’t change the drainage without major building work.
What kind of product could I use to fill this hole to prevent further water going in? I imagine I would need to clean in and around the hole before using product. What would you suggest for cleaning? Thanks in advance
thanks I. Advance
