For trapezoidal roofs measure the bottom edge the top edge also known as the ridge and the distance between the 2 edges.
How to shingle hips the peak of a roof.
Determine the width of the shingle pieces and snap a line a little less than half that dimension on one side of the hip or ridge peak then align the side of the shingles along that guide.
Installing ridge cap and hip shingles on the hips you ll start at the bottom trimming the first piece so the corners of the hip shingles don t extend into the gutter.
The guys would cut a second shingle to overlap the back half of the first one.
Overlap them as before and continue until you reach the top.
Bending and overlapping these flaps the guys would put two more nails to anchor it in place.
To make the shingle flush they would cut a short slice parallel with the ridge.
That s how the guys.
After both hips were finished the guys would place a shingle along the ridge.
Overlay the first shingle with the next nailing in the same manner as for the first shingle.
Find the dimensions of each of the roof s faces.
Then finish by placing the last caps at the very top of the roof.
Start from the bottom edge of the ridge and secure each shingle with 1 1 2 inch nails.
Trim the very last shingle on each ridge as needed.