These are the mainstays of any green roof and should form the bulk of the planting unless provisions are made for the roof to support soil deeper than the 3 to 4 inches that is typical.
													
																	Planters on a flat roof. 
									
	
		
	
																	Here s what you need to know to start one of your own. 
																	A roof garden usually exists on a mostly flat roof surface due to the weight of the materials and the way the space is going to be used. 
																	A roof garden usually consists of larger planters filled with a mix of evergreens flowers shrubs and grasses. 
																	Rooflite soil will not lose volume which is essential for this system where root space is limited. 
															
													
									
	
		
	
																	A roof garden might also include outdoor furnishings and can be thought of as an outdoor room. 
																	A well planned rooftop garden can also provide habitat for local wildlife and mitigate storm water runoff. 
																	Be very careful if it s not up to strength for a roof terrace planters can easily damage and crack a flat roof. 
																	Water may pour in next time there is a downpour. 
															
													
									
	
		
	
																	Planters containers are essentially miniature rooftop gardens that have a total depth of 14 to 18 inches or fall within the deep intensive category. 
																	They require high performance growth media to ensure plant growth health and longevity. 
																	I would have thought planning permission building regs were required to use the roof as a terrace and it rather sounds as if that s not the situation. 
																	These flat roofs are also commonly known as.