The rafter nailers spanning between the posts on the eave side of your lean to must be strong enough to support the load of multiple rafters.
													
																	How to tie in a lean to roof. 
									
	
		
	
																	When a shed roof ties into an existing roof the new roof could be a simple lean to that covers a deck or porch or it could be the shed roof of a substantial addition. 
																	Determine where the lean to will be attached to the existing building. 
																	Let s mark number one off of our 2018 homestead goals list. 
																	1 insert a nail bar beneath the bottom row of siding that lies directly above the. 
															
													
									
	
		
	
																	Attach the horizontal beam by using a nail gun. 
																	Mark the area where you want the structure. 
																	Our diy lean to is done. 
																	Measure 8 feet from the existing structure towards the outer direction and dig a deep hole to drive the post in. 
															
													
									
	
		
	
																	After that to make it flush with the roof of the existing house cut the two outer rafters. 
																	From this existing post measure 3 feet distance in the same. 
																	You have to do it thoroughly so that the rafters sit flush on it. 
																	Make a cutting on one of the sides of the horizontal roof beam on an angle. 
															
													
									
	
		
	
																	Cut the 6 inch thick lumber into blocks that run the length of the lean to. 
																	For roof spans 10 feet 3 0 m or greater 2 x 6 nominal framing or larger should be used. 
																	To tie the roof into the siding the tin roofing panels must first be installed to within 1 4 inch of the siding. 
																	How to tie a additions roof to existing roof roof additions to existing roofs how to construct a roof from an exsisting shead how to change a roof line how to attach a deck roof to existing roof how to add a roof over porch attache porch roof on house attach shed roof to house adding a roof to screened in porch adding a roof to existing. 
															
													
									
	
		
	
																	How to attach a lean to to an existing metal building. 
																	It s not perfect by a long shot but it came out about as good as i expec.