A frame having a slope for supporting tiles of a shower floor, having: a plurality of slats in a grid formation; a higher portion and a lower portion creating the slope; a plurality of guide rails configured to hold the tiles in place at a uniform level with each other and following the slope when placed onto the frame; a drain hole at the lower portion, the drain hole aligning with a drain of the shower floor; the slope of the frame and the tiles allowing water to flow from the higher portion to the lower portion towards the drain and quickly drain the water into the drain, thus preventing accumulation of the water on the shower floor.