Renewing, washing, and/or recycling of used carpet tiles is provided. In accordance with one embodiment, carpet tiles are purchased or leased and installed with adjacent tiles being of a different pattern, design, color, shade, and/or the like so that no two identical tiles abut one another. This method of patterning and installing carpet tiles can eliminate the need for shade sorting and site mapping. Also, this method permits the ability to replace one or more damaged or severely stained tiles with new or renewed tiles and without worrying about tile-to-tile shading. The renewed carpet tiles are washed with a high-pressure fluid, and entangling of piles is removed and piles raised.