MOLDED FIBERGLASS GRATING IS MADE BY HAND. IT’S MANUFACTURED IN AN UPSIDE-DOWN WAFFLE IRON AND IT CONSISTS OF 65% FIBERGLASS AND 35% RESIN. SO, WHAT THAT MEANS IS THAT YOU HAVE A HIGHLY CORROSIVE-RESISTANT PRODUCT. CONVERSELY, WITH PULTRUDED GRATING, IT’S 65% GLASS AND 35% RESIN SO IT’S A VERY HIGH-STRENGTH PRODUCT FOR LONG.
Here we make a chart to tell the differences: