Seal the top with clear caulk.
How to attach shed roof to walls.
Attach roofing to the garage wall with bent metal flashing that goes up the wall and over the roof.
The ledger board in this case is essentially.
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Cover the walls with board and batten 4 by 8 foot sheets of plywood nailed vertically to the sheathing strips with the seams covered by 1 by 4 inch batten boards.
Nail a 2 by 6 inch header board between studs over that doorway and secure it with studs from the header to the floor.
When securing your walls to the floor you will nail or screw through the bottom plate of your wall and directly into the floor joists.
Install shed rafters from the ledger board to the outer wall using metal rafter hangers which attach to the ledger board with screws or nails.
Leave this doorway open.
On a two story house you can usually tie the ledger into a band joist also called a rim joist located between the floors as shown below.
If attaching a patio roof to a ledger beneath the eaves does not allow for enough headroom you can set the new patio roof s rafters on the wall s top plate.
If you re building your own roof trusses the handiest place to assemble them is right on the shed floor.
Add decking atop the roof and nail on metal flashing where the shed roof joins the existing roof.
Fit rafter board into the u shaped hangers and nail it in place.
Frame a wide doorway by bracing the shed roof temporarily and cutting studs with a reciprocal saw.
The best method is to snap chalk lines on the shed floor to outline the truss parts.
But you have to do it before you build the walls.
Toenail a truss into the top of the wall plate by nailing through the sides of the bottom chord at a 30 degree angle.
When a shed roof intersects a wall a ledger board attached to the wall serves as a nailing surface for the ends of the rafters at their upper ends.
They will be fastened to the floor and they will be attached to each other.
As with rafter style roofs toenailing is one of the most common ways of attaching a truss style roof to a wall plate.
