Pre-shaped stair coverings consisting of stair nosing, riser and tread all in one piece for straight steps with right-angled edge. For extremely heavy-traffic stair-well areas. Improves footfall sound absorption by 12 dB. Easy to install, suitable for the vast majority of new construction or renovation projects. norament® stairtread has four products: norament® 926、norament® 926 grano、norament® 926 satura、norament® 926 arago.