Carpet tile construction varies greatly in materials and sustainability. Because of the high performance expectations, commercial wearing layers have traditionally been made using nylon, and only lately have alternatives begun to emerge. Though the most obvious, the wearing layer is usually surpassed by the backing layer in terms of environmental impact.
Some manufacturers continue to use the earliest type bitumen formulas for backing materials, but most will use PVC which was developed to replace it – providing reduced weight, improved stability and ease of laying. PVC itself is becoming eclipsed by some manufacturers eager to reduce PVC’s impact – replacing it with arguably superior materials include PET and polyolefins.