Landscaping over the upper floors of buildings or underground parking garages can be an attractive architectural feature. However, the weight of soil, especially where a variety grades are required, can add major load on the structure beneath.

GeoSpec® lightweight fill material meeting the requirements of ASTM D6817 (see Plasti-Fab® Product Information Bulletin 218 for product types and material properties) provides landscape architects the option to vary finished soil grade. Sufficient soil covering can be added over the GeoSpec lightweight fill material to permit the growth of trees, shrubs or grass.