Flooring underlayment is the layer of material that sits in between the subfloor and the flooring material. As tempting as it may be to skip the underlayment – don’t. The underlayment layer is what keeps your floor tile from shifting and cracking over time.
And trust me, after the killer backache preparing and tiling this floor gave me, it is NOT something I want to completely redo if I don’t have to!
Fortunately, preparing a floor for tile by installing underlayment isn’t difficult to do and once you finish the job you can immediately go into tiling the floor.