If the roof has a triangular shape stretch your tape measure along the bottom edge then measure from the peak point down to the center of the bottom edge.
How to shingle hips the peak of a roof.
To make the shingle flush they would cut a short slice parallel with the ridge.
Overlap them as before and continue until you reach the top.
Repeat this until you reach the topmost ridge and then repeat for every hip ridge.
That s how the guys.
The guys would cut a second shingle to overlap the back half of the first one.
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.
Then finish by placing the last caps at the very top of the roof.
The hip shingles continued all the way to the ridge and that last shingle was cut to length so as to avoid covering the open ridge rafter.
Overlay the first shingle with the next nailing in the same manner as for the first shingle.
After both hips were finished the guys would place a shingle along the ridge.
Bending and overlapping these flaps the guys would put two more nails to anchor it in place.
Trim the very last shingle on each ridge as needed.
For trapezoidal roofs measure the bottom edge the top edge also known as the ridge and the distance between the 2 edges.