fiberglass stair tread. Unlike materials such as carpet or hardwood, which require regular cleaning and upkeep, fiberglass requires only occasional wiping with a damp cloth to keep it looking pristine. This low-maintenance aspect is particularly appealing to busy households or those looking for a hassle-free addition to their living space.molded frp gratings are manufactured in a one piece construction which results in a bi-directionally strong product. This allows openings for piping or cables in the grating of up to 10” without any additional support required (may vary depending on grating depth and location of opening). During the molded manufacturing process, the continuous fiberglass rovings are completely covered in a high percentage of resin, 65% by volume. With this high resin content, molded gratings are the most chemically resistant gratings offered and are often used in caustic chemical environments without hesitation.