There is a section of drainpipe I am struggling to attach to a wall of a house.
The problem is that underneath a layer of render of about half an inch, the wall seems to be extremely hard so I cannot drill far enough in to insert a rawl plugs & screws to keep drainpipe clips in a sturdy position.
I have even tried drilling with a diamond tipped drill bit, but after wasting a lot of time trying, it proved to be a futile exercise. I am puzzled as to what material behind the render is so strong, it looks like some kind of whitish coloured cement/stone like material
Any ideas for a solution to the problem?
The problem is that underneath a layer of render of about half an inch, the wall seems to be extremely hard so I cannot drill far enough in to insert a rawl plugs & screws to keep drainpipe clips in a sturdy position.
I have even tried drilling with a diamond tipped drill bit, but after wasting a lot of time trying, it proved to be a futile exercise. I am puzzled as to what material behind the render is so strong, it looks like some kind of whitish coloured cement/stone like material
Any ideas for a solution to the problem?