Use a 2 by 4 inch board for a short roof up to about 8 feet a 2 by 6 for a longer one.
Best way to build a lean to roof.
Made from this plan.
Typically a lean to roof will lay at a different pitch than your existing roof.
It is a good idea to build a lean to roof that will give a good look to the exterior area of your house and also help utilize this space.
Use right size of rafters and headers.
Frame the top bottom and sides of the wall using 2x4 lumber and attach joists between the top and bottom every 22 5 inches 57 cm using 3 inch screws.
I am asking because after a few snow seasons with all the snow weighing down on the roof edge the nails could pull out of the 2x6 and 4x4 post and your roof could give way.
Measure the width of the outside wall and cut the board with a circular saw to the same length.
The sloped roof of the lean to shed will allow water and snow to run off to one side of the roof without soaking into the wood.
2 screw the add on wall to the top of 1 side of the shed.
For the final step install the trim of your choice as a cover against the side structure.
The lean to s roofing will need to fit fairly snugly underneath the existing roof to prevent rain from blowing into your addition.
The 2 4 rafters would be sheathed with 19 32 tongue and groove osb and then i d use asphalt shingles to finish the roof.
A lean to construction will be easier to build as compared to a gable roof carport the roof will direct the water in only one direction so you could build it close to the property line.
Screw it in with a drill and nails.
Space rafters either 16 o c.
Check if the posts are plumb and if the support beams are horizontal before locking them into place with screws or bolts.
When all the 2 4 s are cut that need to be build the roof framing according to your blueprint.
Cut back the roofing on the existing building if needed so that the new roof can fit correctly beneath it.
Using bolts washers and nuts or placing an additional 6 inch piece of 2x4 below the 2x6 at each post as a ledger board would help support the weight better.
It will be easier to build this in place on top of the shed but if you can t build it on the ground then put into place before adding the sheathing.
For shingles or 24 o c.
To maximize the back wall height and due to the roof overhang of the existing shed the lean to butts against i decided to attach the rafters to the double top plate using simpson strong tie ridge rafter connectors.
