Go one - say it a few more times... it might sink in .
i very much doubt it
What does that mean? Jesus.. Have I anywhere in this thread mentioned that I am going to ignore the advice and do it my way anyhow?
I have been a sparky and chippie on sites since I left school - 26+ years.
If I could find a plumber who wasn't a bodging rip-off merchant, then I would not have to do this myself in the first place.
Can't remember the last time I saw a yellow PVC coated gas pipe installed on a domestic installation.
If a plumber had done it, I bet it would have likely to have been standard copper and no-one would have said anything.
Checked with building inspector. Sleeved Speedfit hot and cold run under the Celotex and PVC coated Gas with soldered joints which are then taped over, also run under the Celotex away from the heating.
Put felt insulation over the PVC coating as a bit of extra protection anyway.
Underfloor heating on top of the Celotex as usual.
Pressure tested the Gas pipe. Job done.