Use the chalk line to snap a straight line vertically every 6 inches.
How to install shingles on a lean to roof.
Alternate rows by staggering the joists between the shingles.
Many pros shingle in a vertical line up the roof because it s much faster.
The first thing i decided to stop laying.
Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles.
Repeat this on both sides of the roof.
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.
Every 5 inches make a new mark until you get to the rop of the roof.
Arrange them in neat rows to ensure that water will not fall between the shingles that are not aligned.
Washers on your own a few places ive read in place.