Hi all hopefully some  one can help? Doing my kitchen out all the plaster is off the walls .The internal wall were the radiator is going had the old pipes running down the the wall which looked naff.so my question is can I chase out some of the brick out to allow the 15mm copper to run internally behind green plaster board?.If so is it best to lag the  pipe so to reduce possible condensation causing issues ? Many thanks in advance Jason.

 

Condensation won’t form but chasing them would be preferable. 

Chase them in, PVC tape the pipe, and then use expanding foam to fully encapsulate the pipe. If you don't then the heat from the pipes will be forever heating a cold wall.

Thanks guys when you say pvc tape is that the same as electrical tape? Regards jason.

23 minutes ago, Jase said:

Thanks guys when you say pvc tape is that the same as electrical tape? Regards jason.

yup  

Thanks nick.