When installing carpet tile, why should the direction of the tile be alternated 90° degrees?

Alternating the direction of carpet tiles by 90 degrees serves to minimize wear appearance. When carpet tiles are laid in the same direction, wear patterns can become more noticeable as foot traffic creates a uniform appearance. By alternating the tiles, the way light reflects off the fiber changes, which helps conceal wear and prolongs the visual appeal of the flooring. This practice not only enhances durability but also contributes to a more varied aesthetic, as the different orientations can provide a dynamic look that adds depth to the overall design of the room.

While aesthetics can also be a consideration in this method of installation, the primary purpose is functional—reducing the visibility of wear. Other options may involve ease of installation or waste reduction, but they do not directly address the key concern of maintaining the appearance of the flooring over time in the same manner that alternating the tile direction does.