Hold a speed square also known as a rafter square plumb against the top nailer where your string is fastened.
How to seal a lean to roof.
Place the rib inside closure inside the groove both overhangs will have this.
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.
Determine the roof pitch by stringing a line from the top rafter attaching point to the bottom one.
After the shed roof framing is complete finish the lean to along with any part of the existing roof from which you ve removed shingles with new shingles to blend the lean to into the old roof.
Place the first panel on one end of the roof and secure it to the sheathing strips top and bottom with a screw gun and galvanised steel or aluminium screws depending on the type of roofing metal with plastic washers on them.
Read the angle on the square s angle scale.
Place the starting panel onto one edge of the roof.
For the final step install the trim of your choice as a cover against the side structure.
Screw it in with a drill.
Determine where the lean to will be attached to the existing building.
Cover the lean to roof with corrugated metal roofing.
Screw it in with a drill and.
The side of the panel that has a slightly flat side is to place on the roof.
The other side is for overlapping the panel.