Hi, I believe that copper pipes cannot be laid in concrete floors anymore. Is this the case? I can see plenty of evidence of failures due to it being done in the past. Also have found plenty of messages saying it is not allowed. However, can't find anything to back up the claims. Is there a building reg or something that can be quoted? A link would be good. My builders / plumber (CORGI registered) are about to put some piping in before a new concrete floor is poured and I want to make sure it is done right. The pipes are central heating pipes to rads and a gas feed. The copper gas pipe is already in and has been covered with a sort of hessian bag.