I'll be laying a 10mm Kronos laminate onto perfectly dry Victorian quarry tiles on the ground floor of my hovel. Its a cold room that has a new radiator and, in time for Christmas, a log burner, so the room will be heated. What's the best type of laminate underlay to keep the warmth above the floor and the cold well and truly below it? I've recently come across something called Depron which bigs itself up quite nicely? Any thoughts?