Repeat this on both sides of the roof.
													
																	How to install shingles on a lean to roof. 
									
	
		
	
																	Use the chalk line to snap a straight line vertically every 6 inches. 
																	The first thing i decided to stop laying. 
																	Known in the trade as vertical racking or staggering this how to lay shingles method enables the roofer to install a single column of shingles all the way to the peak without the wasted back and forth motion necessary to fill several rows of stair steps. 
																	Many pros shingle in a vertical line up the roof because it s much faster. 
															
													
									
	
		
	
																	Arrange them in neat rows to ensure that water will not fall between the shingles that are not aligned. 
																	Every 5 inches make a new mark until you get to the rop of the roof. 
																	Washers on your own a few places ive read in place. 
																	Start from the edges and move towards the house. 
															
													
									
	
		
	
																	Alternate rows by staggering the joists between the shingles.