A 900 square foot flat roof in the san francisco area made of concrete tiles costs.
													
																	Pitched roof with flat section. 
									
		
	
	
		
	
	
		
	
	
		
	
																	The flexibility of a pitched roof is unmatched with that of a flat roof. 
																	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. 
																	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. 
															
													
									
		
	
	
		
	
	
		
	
	
		
	
																	Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape. 
																	A flat roof v s pitched roof extension is a topic to ponder as both roofs are in trend. 
																	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. 
																	A pitched roof is in contrast to a flat roof which technically is any roof with a slope less than 10. 
															
													
									
		
	
	
		
	
	
		
	
	
		
	
																	A pitched roof is more durable and weather resistant. 
																	The pitched roof helps to create an additional space at the home. 
																	Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. 
																	Roof shapes vary from almost flat to steeply pitched. 
															
													
									
		
	
	
		
	
	
		
	
	
		
	
																	A single flat sheet or a complex arrangement of slopes gables and hips. 
																	They can be arched or domed.