Use the chalk line to snap a straight line vertically every 6 inches.
Installed roofing shingles.
Center a minimum 610 mm 24 wide minimum 28 gauge pre finished galvanized metal valley liner in the valley and fasten with only enough nails to hold it in place nailing at the edges only.
Every 5 inches make a new mark until you get to the rop of the roof.
To start installing shingles line up aluminum drip edge flush with the edge of the roof and make a pencil line at the top on each end of the house.
Before you begin make sure you re comfortable measuring laying out a job driving nails and cutting with a knife.
Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles.
Overlap each metal piece by at least 150 mm 6 and use asphalt plastic cement under each section of overlap.
Repeat this on both sides of the roof.
You can install shingles by hand using a roofing hatchet but the work will go more slowly.
Using the chalk line snap a line between the two marks to get a straight edge.
With one or two helpers you ll be able to shingle a 1 500 square foot roof in about two days.