Dirt Dogs Excavating is your erosion control specialist! Matting, erosion control logs, silt fence and check dams all work in conjunction to stabilize loose soils and help reduce overall erosion. The only erosion matting used a Dirt Dogs Excavating is a 1 year or a 2 year biodegradable material. This matting goes over areas where seeding has been installed. Matting helps heal the seed in, prevents birds and wind from removing the seed and holds moisture in the soil while the seed takes root. After the grass has penetrated the matting, the mat will decompose and dissolve into the soil.