Hello,

My downstairs radiator pipes go into the concrete floor and run
along three of the four walls in the room. This means that they must
be running back and forth the length and width of the house. I am
concerned that these unlagged pipes must be losing a lot of heat into
the concrete floor.

Since we are decorating, I wondered about re-doing the plumbing at the
same time. The only way I could see was to drop pipes from upstairs.
However this would mean that each drop would require its own drain and
I worried that lagged pipes would be too thick to chase into a wall.

I read some old posts (2006) that were still on the newsserver in
which someone was recommended to bury his pipes in a concrete floor
after lagging them. Is this the best approach?

Would lagged pipes loose more heat when surrounded by concrete
compared to air? Is it best to keep them above the floor?

What other options are there? Hid the pipes behind the skirting board,
or aren't I allowed to do that in case someone puts a nail through?

Thanks,
Stephen.