I've had two quotes for tiling a kitchen and hallway. The kitchen is to have underfloor heating, just enough heat to warm the tiles as have radiator in the kitchen already. One tiler said single wire would be fine for my circumstances, the other said the matt system would be best. The area is approx 2m sq.Which would you install and what are the snags with either of them?Also do I need to have a switched spur connected to the underfloor heating system. The tiler is proposing the single wire system has said 150W is enough, could I get away with 100W system as this is just to warm the tiles? Tile on top are to be 0.9cm thick porcelain. The property is a new build, do I need insulation boards under the wire, can you get a liquid screed that works as insulation in place of insulation board? Tiler has also mentioned that tile insulation boards I could probably get away with, as won't have much heat loss downwards from the wire and also that it means I wont need to worry about insulation boards costs and getting all the hallway to match the kitchen level.