mrs has seen some wonderful large tiles,and wants them in our bedroom floor.They do look good,and reasonable price.My question is how do i go about laying them on floorboards.Floorboards are ok,not brilliant.Do i have to put hardboard or other flat material on first,also what kind of adhesive would i need.And finally,the homer simpson question,if i get all electrics sorted out for sittingroom lights,below the bedroom,are these tiles then a permanent fixture ,never to be lifted,or is there a clever idea i can use to gain access to joint boxes.Thanks