How To Roof A House With Three Tab Shingles

Align and install the 2 tab shingle aligned with the next 5 inch higher chalk line.

How to roof a house with three tab shingles.

As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. Pattern curling is caused by the roofer having to lift the end tab of every other shingle to install the last shingle nail at the end of the next shingle. Do this on both sides of the roof. High wind areas and other types of shingles may need more.

Drive a nail at one end first then drive the others. Place it so the tab of the end shingle covers it completely. Install a starter course by cutting off the three tabs on a shingle leaving only the top tar section. The average 3 tab shingle needs four nails per shingle.

Do not fasten the flashing piece to the vertical wall. Use the chalk line to snap a straight line vertically every 6 inches. Begin row 4 with a shingle cut in half 1 and tabs and complete that row. Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles.

Complete the row with 3 tab shingles. Secure the horizontal flange to the roof deck using two nails. Because the bending can stress and deform shingles especially in cold weather the ends of those shingles may warp over time creating a prominent pattern on the roof. Using the chalk line snap a straight line on each 5 inch increment.

320 nails will be needed to install a square of standard 3 tab shingles assuming four nails per shingle and 80 shingles per square. To attach a 3 tab shingle align it with the layout line and drive nails 1 2 inch above the cutout slots including the half slots at each side. Row 7 begins with a full 3 tab shingle. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area.

Repeat this on both sides of the roof. This will allow the flashing piece to move independently of any differential expansion and contraction that may occur between the roof deck and the wall. Begin row 5 with the 1 tab shingle and row 6 with the 1 2 tab shingle. Use the chalk line to snap a straight line vertically every 6 inches.