Stretch the chalk coated string tightly between the nails.
How to snap a chalk line for roofing.
The end of the chalk line is tied to a loop or clip.
Hammer a nail or drive a screw into one of the end points.
Pull the string loaded with chalk out of the chalk reel.
You may need a measuring tape to set these points.
Then hook one end of the chalk snap line to your beginning point.
Mark the two end points of the line you are trying to draw.
Using or snapping off a chalk line is simple.
Find the endpoints of your line and drive a nail in at each point.
To pop long chalk lines accurately when flooring or roofing.
If you have a well functioning chalk snap line you can slowly play out the line without using the crank.
Here is a quick guide on how to do it.
Hold or secure the chalk line at the end point of the line.
First shake up the chalk inside your tool or add chalk if it does not have any.