Snap a vertical chalk line from the inside edge of the first shingle on the second row to the top of the roof and from the inside edge of the first shingle to the top of the roof.
How to use a chalk line for roofing.
When the compartment is filled with chalk the string in the coil becomes coated in the chalk.
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You ll have a choice of red blue white or fluorescent chalk.
Tap the chalk box occasionally to settle the chalk.
Mark the two end points of the line you are trying to draw.
The end of the chalk.
Every 5 inches make a new mark until you get to the rop of the roof.
These chalk lines will serve as a guide for subsequent even numbered rows of shingles and odd numbered rows respectively.
Here is a quick guide on how to do it.
Fill the chalk box about half full with powdered chalk from a squeeze bottle.
Fill your chalk box with blue chalk for general use.
Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles.
Use the chalk line to snap a straight line vertically every 6 inches.
Using or snapping off a chalk line is simple.
Marking straigh level lines with a spirit level can be a little tedious using a chalk line however can make things decidedly more simple.
Repeat this on both sides of the roof.
How to use a chalk line.