Every 5 inches make a new mark until you get to the rop of the roof.
How you install roof shingles.
Repeat this on both sides of the roof.
Pull the drip edge down about a half inch from that line to create a gap between the drip edge and the fascia board.
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 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.
Known in the trade as vertical racking or staggering this how to lay shingles method enables the roofer to install a single column of shingles all the way to the peak without the wasted back and forth motion necessary to fill several rows of stair steps.
To install asphalt shingles start by installing underlayment and new flashing on the roof.
Use the chalk line to snap a straight line vertically every 6 inches.
Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles.