Use the chalk line to snap a straight line vertically every 6 inches.
How you install roof shingles.
Repeat this on both sides of the roof.
Then begin nailing the shingles to the roof working in rows and starting at the edge of the roof.
Using the chalk line snap a line between the two marks to get a straight edge.
To install asphalt shingles start by installing underlayment and new flashing on the roof.
Once you ve done that cut your shingles to size if they re not already.
Install the shingles so that each one is overlapping the shingle directly below it which will conceal the nails.
Every 5 inches make a new mark until you get to the rop of the roof.
Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles.
Pull the drip edge down about a half inch from that line to create a gap between the drip edge and the fascia board.