non-metallic building materials namely, fly ash, sand, gravel, stone, aggregate material composed of fly ash, composite panels and blocks composed primarily of non-metallic materials, and concrete building materials in the form of blocks, bricks, posts, slates and panels; light weight aggregate building materials composed of fly ash, cement, sand, stones and gravel

Non-metallic building materials, namely, fly ash, composite panels composed primarily of non-metallic materials; concrete building materials in the form of blocks, bricks, posts, slates and panels; light weight aggregate building materials composed of fly ash, cement, sand, stones and gravel

NON-METALLIC BUILDING MATERIALS AND COMPONENTS-NAMELY, CONCRETE, SCREEDS, AGGREGATE, BUILDING BLOCKS, INSULATING BLOCKS, PANELS, BEAMS AND PRECAST FLOORS AND BUILDING COMPONENTS MADE OF CONCRETE