How to build a lean to shed roof step 1.
How to build a lean to shed roof.
To attach a wooden nailer to a metal sided building use a self drilling screw with sufficient threads to hold the nailer tightly.
Dig out the first hole set in the block and check the elevation of the floor using a 2 6.
Connect the ends.
Make sure the block is deep enough to give the desired finished floor height.
Make a ledger board to fasten to the existing wall and support the upper end of the lean to roof.
Construct the roof supports 1 fasten the nailer to the side of your existing building where you will attach the upper end of your rafters.
Start with a corner block.