I saw this snap edge tile at a local home center, the one with the blue triangle out front,and wanted to know if anybody has it and what the drawbacks might be. It's around $4.00sqft and looks pretty good from what I saw. It is REAL tile on top of pressboard, just laydown a rubberized underlayment and place the tile boards on top of that and snap it together, there are 2 tiles per board. Including the underlayment $15 roll and their $10.00 a bottle grout product it could get a lil pricey. But i think i can use my own sanded grout and roof felt for an underlayment. Final thought, Can roof felt be used "indoors" as a "SAFE" moisture barrier underlayment for a floor? My concern, is anything toxic given off from roof felt?