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.
How to attach the shed roof to the walls.
This will occur at all four corners adding an additional attachment point for each corner.
They join at the peak of the roof by connecting to the opposing rafter or to a ridge beam that runs the length of the peak of the house or shed.
Make a cutting on one of the sides of the horizontal roof beam on an angle.
After that to make it flush with the roof of the existing house cut the two outer rafters.
Use screws to secure the rafter to the sill plate.
Joist hangers can help you mount each rafter to the house.
If you re building your own roof trusses the handiest place to assemble them is right on the shed floor.
Rafters are beams that run from the peak of the roof to the top plate of the supporting walls.
Fasten the truss by driving 8d finishing nails at an angle down through the board just above the birdsmouth notch and into the underlying wall plate.
The best method is to snap chalk lines on the shed floor to outline the truss parts.
If you decide on a shallow pitch porch roof use 2 by 6 foot rafters.
Do the same with the rest of the pieces.
Put a jack under a corner and raise it up till the roof sheeting comes in line with the truss.
After the roof is sheeted then go around and re level the floor.
The most common roof to wall intersections involve either a gable roof with its ridge running perpendicular to the wall or a shed roof that slopes downward away from the wall.
Seal the top with clear caulk.
Rafters are installed piece by piece during the construction of the roof.
Attach the horizontal beam by using a nail gun.
Lower the first rafter truss into place at either the front or back of the shed.
Then nail that piece down.
The porch roof may match the pitch of your home or have a more shallow roof pitch.
Experiment with jacking different corners or walls until you get the results you want.
The top plate on each side will overlap and attach to one adjoining wall corner.
But you have to do it before you build the walls.
Then use the chalk lines as a guide for cutting the truss patterns and assembling the trusses.
Use 3 nails for each side.
The positioning of your rafters will depend on the pitch of the porch roof.
Add a second top plate to more securely attach the walls and to add strength and support for the roof.