That works out to about nine degrees if that works better for you.
													
																	Shingle roof slope. 
									
	
		
	
																	Why is 2 12 the minimum. 
																	Asphalt shingles continue to be the most widely installed roof covering option in north america. 
																	The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. 
																	The minimum requirement is 2 12. 
															
													
									
	
		
	
																	The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. 
																	The roof shingle calculator is a free estimator that serves a useful purpose during any roof repair or replacement project. 
																	Considering the roof slope requirement is important. 
																	Shingles of all types need to have a slope to function properly. 
															
													
									
	
		
	
																	This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. 
																	Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope. 
																	The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. 
																	For example if it is a very low slope water including snowmelt or rainwater drains slowly and this increases the chances of. 
															
													
									
	
		
	
																	The roof pitch between 2 12 and 4 12 is considered as a low pitch roof so shingles can be installed in the roof slope between 2 12 and 4 12. 
																	What is the minimum slope for an asphalt shingle roof.