We'd like to put underfloor heating in the barn we are converting into a house. The solid concrete floors are already down (they were there when we bought it), and we've already put in an oil fired boiler to heat the water for the system. We'd like to know - Best products to buy? Where to buy, UK or France? Is it a DIY job or should it be professionally fitted, and if so any recommendations for installation companies in south of Vienne department (86), or Deux-Sevres (79), or north Charente (16). Does anyone have any hints, tips or advice - please ! :) SueP