Carpets have been used for many years to cover floors all over the world and have also been used to celebrate all types of special occasions. Carpet dealers define the "face weight" of a carpet as the ounces of fiber attached to the backing material per square yard. Large Objects. Face-weight is the actual weight of the fiber used to manufacture the carpet pile, but does not include the weight of the carpet backing. Fiber Face-weight is not the same as Total Carpet Weight, which includes the weight of the carpet backing and the fiber face-weight. This number has nothing to do with the density of the carpet, because a long, sparse pile can have the same weight as a short, thickly stitched pile. Fitted to make a home comfortable and warm, carpets also add to the appearance of a home or other type of building. Weight Of Carpet.