Chasing pipes in to wall for bar shower

[Fredstudio]

Hi, I need to chase two 15mm copper pipes in to the wall to feed a bath shower above a bath. The wall is an external wall, with this in mine will they need lagging?

 

[Robiow70]

Wrap the pipe in some duck tape or electrical tape, and nail clip in. Try and use soldered fittings. Regards robiow

 

[Fredstudio]

Thanks so no need for insulating the pipes? with it being chased in to the plaster on an external wall?

 

[Nicksun]

I used expanding foam around my pipes. Wet the surfaces with a water spray as it helps with curing and adhesion. When dry, I cut it back to below the wall surface, primed with pva and plastered. I'd guess you'll be tiling over the chases anyway.

HTH

Nick.