The preferred spot would place the lean to under the overhanging roof of the existing building.
How to add an awning to an exisiting roof.
Determine the beam size.
Install some riser brackets for more height.
You ll need to remove the existing shingles and cut back the existing eaves to make room for the shed roof then nail a two by six ledger board on the existing roof.
This method may be one of the most ubiquitous ways of attaching a.
Attach 2x6 rafters to the house with joist hangers and or supported by the ledger board.
Make the patio roof a little bit higher.
Work from the view back not from the house out.
The ends of the shed rafters.
Rafters are placed on 24 centers and attached to the beams and settle joists are attached as needed image 1.
Determine where the lean to will be attached to the existing building.
Most common ways to attach a patio roof to an existing house.
If necessary use a sliding bevel to determine angles needed where the rafters will meet the ledger board.
Calculate the sightline clearance height about 6 feet 2 inches in this case.
Fix the back channel to the fascia boards underneath the gutter directly.
Any water runoff will flow off of the main roof and hit the lean to at an angle to prevent pooling and flooding in the lean to.