Our rooftop planters are selfwatering modular planters uses for roof gardens on different types of roofs, the advantage of these kind of planters is to convert roof areas to green areas faster than the engineering green roof systems we have, also the cost of rooftop planters cheaper than engineering green roof systems. But comparing to ZinCo green roof systems, the disadvantage of this system including the limited desigin options as you cannot do unlimited landscape garden designs such az ZinCo systems, also the roof gardens with modular planters cannot be used as walkways or seating areas such as ZinCo green roof systems.