waste under insulation and screed All aspects of plumbing questions and answers, help, tips and information

[spwilko]

Hi
I am routing my 40mm waste along the edge of a room. I will have 70mm insulation and 70mm screed and wondered what's the best way to lay my waste, ie how should I support it to keep it straight and how should I protect it from the screed.

thanks for your help gurus.