"Ian Middleton" wrote in message
...
"Michael Mcneil" wrote in message
news:c49813f59572b81964016cf5bbc6d096.45219@mygate .mailgate.org...
"Paul Roberts" wrote in message


I am refurbishing my utility, and want to bury some exposed 15 mm pipes
in
the concrete floor.

Tape them up to insulate them chemically if they are copper and put some
rockwool over them too if there is room.

I expect I'll need to check for other pipes first, but any other
considerations or advice, please?

Before you chop out the channels? Obvious one that.

How deep were you thinking of going? :~0

If you don't protect them the concrete eats them away.

A friend of mine when he moved into a house near me in 1994 (built 1974)
kept on getting a "damp stain" on the lounge carpet. Anyway ripped carpet
up
and there was a large damp area on concrete floor. Carefully chiselled out
and found two copper central heating pipes and one copper gas pipe that
fed/came from the back boiler. The gas pipe was wrapped in a sticky cloth
tape (Denzo tape ?) but the two copper pipes hot out and cold return to
the
radiators where just embedded in the concrete. Both these pipes had tiny
pin
prick holes all along their length very slowly leaking water causing the
damp patch. He simply replaced the runs under the floot, this time putting
the copper pipe in a plastic pipes (Hep2O ?) and problem solved.


I concur. Copper reacts when in contact with concrete