Do not fasten the flashing piece to the vertical wall.
How to start a 3 tab shingle roof.
However make sure that you do not nail into the tar strip.
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Place nails in the three tab shingles about 3 4 inch 1 8 centimeters above the cutouts near where the tab meets the upper part of the shingle.
Drive a nail at one end first then drive the others.
Starting at the bottom of the roof map out a guideline with chalk.
Nail the cut off shingle into place about 6 inches from its lower edge.
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Hammer in one nail about 2 inches from each end of each shingle and another nail about 1 inch above each cutout.
A chalk line will need to be popped going down the middle of the roof from the bottom to the top.
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.
Continue to chalk additional guidelines based on the width of the shingle through at least four courses rows across the roof.
If you are using a power nailer drive nails by squeezing the trigger and bouncing the nailer s tip onto the shingle.
To begin you will need to cut the tabs off of enough shingles so that you will be able to have an entire row of shingles that have no tabs across your roof.
After completing a column the roofer can go back down to the eave edge of the roof and start laying the next column of shingles.
Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles.
Secure the horizontal flange to the roof deck using two nails.
Step 3 start line.
Both step shingling and racking will yield a watertight.
Lay a starting row at the bottom of the roof along the edge.
Not only that the shingles can be piled just to the side of the column being laid.
Place it so the tab of the end shingle covers it completely.
You will then need to get your measuring tape out and measure the roof.