Christian McArdle wrote:
I have a solid concrete floor which we are ripping up and going to
re-lay.

You could try something like a Continental Solution 10 kit. Make sure,
whatever you choose, that the floor construction is appropriate before
laying any concrete.

http://www.discountedheating.co.uk/s...lution_10.html
http://www.continental-ufh.com

Christian.
If you really want to be warm, forget about underfloor heating.
Whenever I look at a these systems they invariably are used in
conjunction with other heaters and the owners just wont admit that they
are useless because they spent so much money putting them in.

Put a decent layer of insulation under the floor and leave it at that.