Question: what are the names of roof parts?
Answer: Decking (or sheathing) Usually made from 1⁄2-inch plywood, the decking closes and reinforces the roof structure and provides a nailbed for the shingles. ... 
Roof edge (or eaves edge) All the boards running along the edge of the roof or eaves. ... 
Attic. ... 
Saddle. ... 
Ridge. ... 
Valley. ... 
Underlay membrane. ... 
Eaves membrane.