Can gas pipes be ran on warm side of cold roof?

[jayc89]

My gas boiler will eventually move into the loft space. I want to run all the pipework in readiness for that (gas, water, flow, return), before I re-insulate the loft but leave it all disconnected ready for my gas engineer to connect to when I do move the boiler. 

 

I plan to run all 4x pipes under the loft insulation, so on the warm side, is there any problem with running gas pipes within wool roll insulation?

[JohnMo]

No, it doesn't care, mine was run through insulation space by the gas engineer.

[TonyT]

Don’t you need ventilated spaces incase of a leak?

 

[TomoD]

Their fine in the roof providing their not in a cavity