HORT 15 Lecture Notes - Lecture 12: Vermiculite, Perlite, Urban Heat Island
Document Summary
Green roof a contained green space on top of a human made structure below, partly or wholly covered by plants. Extensive - inaccessible, not designed to be walked on, low maintenance, less expensive to establish. Intensive - accessible, whole roof is modi ed but only part of the roof os covered by plants, more costly to establish because of materials involved. Ability to prevent rotational movement, shrinkage and compaction. Inorganic materia - vermiculite, perlite, expanded slate and clay. Organic material - straw, saw dust, wood, grass, leaves.
