Hi I am a novice and after reading the above, it is a great help.
I have recently done a small area of rendering and I believe I had the mix right - 3 plastering sand to 1 cement with a mixing agent got from Mitre 10( I am applying it over some bluesheet and fibresheet - typical style of place at Goolwa). I have done this before at another palce but my problem is that it has dried and but is very soft. I can scratch it off with my fingernail. Is there a simple thing I've done wrong or a multiple of errors beyond a novice such as myself.
thanks Waxa