what about porcelain tile? 16 x 16 is not a true 16 x 16 this is going mess everything up, now packaging will have to be changed and precise measurements will have to be printed on boxes. The added cost will be passed on....
Not only that, but with the way tile is sized, the grout lines are pretty much worked out in the calculations just by calculating the tile alone. Now I’m going to have to calculate the tile AND the stupid grout lines.