DYWI® Mat is a cuspated, randomly extruded 3D matrix of polypropylene fibres. The fibres are extruded over a light weight biaxial geogrid which provides additional tensile strength, allowing the matting to be applied to steeper slopes. The aim of the product is to provide an artificial root structure to the layer of soil on the surface of a slope. DYWI® Mat products provide resistance to the removal of the upper layer of soil from pluvial and wind erosion.
DYWI® Mat is designed to be installed on slopes of up to 50°; however, when combined with DELTAX® slope protection mesh, it can be installed on faces of up to 70°. When used alone, DYWI® Mat is secured to the slope surface using pins driven in at regular spacings. Pin spacing will increase as the slope height or length increases. If intermediate pinning cannot be accommodated, anchor trenches at the top and bottom of the slopes can be used due to the increased tensile strength of the DYWI® Mat.
If possible, the DYWI® Mat will be dressed with topsoil and seeded following installation; however, on steep slopes this may not be possible. Where DYWI® Mat will be left exposed, the green colour reduces the visual impact on the surrounding environment compared to traditional black erosion mats. DYWI® Mat provides an ideal surface to accept hydro seeding following the installation if hand seeding is not practicable. Green erosion matting maintains a low temperature at the surface layer, protecting germinating vegetation.