However in practise they tend to be much shallower commonly being expressed as a gradient and can be anywhere from 1 40 to 1 80.
													
																	Pitched roof with flat section. 
									
	
		
	
																	They can be arched or domed. 
																	Of course you don t need to live in a modern house to deal with a flat roof. 
																	A 900 square foot flat roof in the san francisco area made of concrete tiles costs. 
																	According to improve net s online roofing calculator a flat roof is significantly cheaper than a pitched roof. 
															
													
									
	
		
	
																	Definition of roofs slopes flat roof a flat roof is defined by having a roof pitch below 15 degrees or a fall of 1 in 40 and can comprise of different products pitched roof a pitched roof is defined by having a roof pitch above 15 degrees or above fall of 1 in 40. 
																	Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. 
																	A single flat sheet or a complex arrangement of slopes gables and hips. 
																	The pitched roof helps to create an additional space at the home. 
															
													
									
	
		
	
																	A flat roof v s pitched roof extension is a topic to ponder as both roofs are in trend. 
																	Or truncated terraced cut to minimize the overall height. 
																	Roof shapes vary from almost flat to steeply pitched. 
																	A pitched roof is more durable and weather resistant. 
															
													
									
	
		
	
																	The pitch of a roof is its vertical rise divided by its horizontal span and is a measure of its steepness. 
																	But a pitched roof has more advantages than a flat roof.