What is infill?
The infilling of turf is the addition of material into the turf to give it a cushion, add weight, and protect the yarn. This is done after the turf is placed, seamed and tied into the surrounds. There are two basic materials used for this purpose. The most common material is crumb rubber. This is a material made by grinding up old car and truck tires. The other less frequently used material is silica sand. Some turf installers mix sand and rubber. Some fields that have a sand and rubber mix have seen a premature degradation of the yarn, which could be due to the hardness of the sand wearing against the yarn. The addition of the infill material gives your field softness and the ability to absorb the shock of someone falling on it, which lessens the chances of injury. The shock absorption ability of the field is measured using a special machine and presented as a G-Max rating. Essentially, the lower the G-max rating, the softer the field. There are two basic kinds of crumb rubber used in
