Graysen Woods Ceramic Series (12"x24" Tiles) features a strong polymer mortar and grout, along with high density backing board for a sturdy foundation. Our products have undergone rigorous testing for ember protection under listed hearth appliances, ensuring safe and approved installations. Graysen Pads can be directly placed on carpet, without the need for additional backing. No cutting of carpet is necessary to use a Graysen Hearth Pad.