Figure 3-35. Applying the drip edge
c. Snap chalk lines on the underlayment (felt) to indicate the location of each course (see Figure
Figure 3-36. Snapping a chalk line
d. Begin the first course of shingles with a whole strip at one end of the roof (see Figure 3-37).
e. Cut the second course so that the lap occurs at the half-tab point (see Figure 3-37).
f. Use four or six nails in each shingle.
g. Use nails that are 1 1/4 inches long for new roofs.
h. Place a nail 1 inch from the edge of the shingle.
i. Place one or two nails near the tab slots (depending on the requirement) as shown in Figure