Producing concrete that mimics natural stones is art in a cementatious medium and overlapping texture skins is one of the crucial techniques. Completely counter to the precise alignment of stamps, skins must be placed randomly so their impressions imitate the irregular looks of natural stone materials.
Bob Harris, director of product training for the Scofield Institute, suggests overlapping skins some four to twelve inches. “I hold a skin up and when it overlaps the one I am standing on, I step on the one I am holding to keep it from moving when I am laying it down. Then I walk out on it.”
He recommends rotating a mat 45 to 90 degrees each time it is picked up and relaid. “If you don’t rotate a mat, you will see the repetitive pattern which customers don’t like.”
Mats cannot be dragged across the wet concrete. To make crisp, professional impressions, the mats must be pulled directly up and placed straight down.
Many crews will use mats in sets of three. They stand on the first, lay the second and tamp it. While standing on the first and second mats, they lay the third. Then, picking up the first mat, they repeat the process.