Hello,

I am new to this group and have seen some posts in the past
relating to putting central heating into flats with concrete floors. I
have a couple of questions relating to this topic which I hope you can
help me with.
I have recently bought a ground floor maisonette with two
bedrooms. The floor is concrete and at the moment I am not sure if it
belongs to the leaseholder? There is a 20 year old warm air (Johnson
and Starley) heating system but the ducts only go into the living room
and hallway. The two bedrooms and bathroom come off the hallway.
I was thinking of a couple of solutions.

(1) I have seen that these warm air systems work well (maybe
with an upgrade) but there are no vents into the bedrooms. I am
guessing it is a pretty big job to run good size vents into these rooms
as I would need to cross the hallway in some way? Is this a solution
worth considering?
(2) Going for a more traditional wet heating solution would
still require pipes to be taken around the house. I was not too
enthusiastic about digging channels in the floor and was wondering
whether anyone had any comments on the use of small bore high level
pipes with vertical feeds to radiators. Presumably the pipes could be
hidden either in a false ceiling or in coving around the edge of the
wall. I have also seen that some modern heating solutiions utilise
plastic pipes, is this a bad idea?

Thank you very much for your time in looking at this query,

regards, Giles