A reinforced seam/inlay and method for forming such seam/inlay to join pieces of synthetic turf material together are disclosed. The reinforced seam/inlay structure comprises abutted edges of first and second synthetic turf pieces having a backing joined together; a seaming cloth/tape material coated with an adhesive/glue, volatile solvent or heat activated material applied is positioned beneath the abutted edges of synthetic turf pieces wherein said abutted edges are adhered to said seaming cloth/tape material; and reinforcement fastener elements inserted through both the backing of the synthetic turf material, through the adhesive and the seaming cloth/tape material; or seam/inlay structure comprises of overlapping edges of first and second synthetic turf pieces having a backing joined together; the backing without seaming cloth/tape material can be coated with an adhesive/glue, volatile solvent or heat activated material or not and reinforcement fastener elements inserted through both the backing of the synthetic turf material.