Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet.
Gable and valley roof house.
This design is often seen in colonial style houses.
I ve also drawn a line connecting opposite corners of the big rectangle formed by the main facade.
As seen here a front gable became the perfect entryway to a suburban garage in the age of the private automobile.
The wall gable is similar to a classical pediment but more simple and functional like a basic element of laugier s primitive hut.
However if the roof also contains hips and valleys it should either be shingled or roofed with metal shingles or standing seam to help prevent roof leaks.
A front gable roof is placed at the entrance of the house.
The gable and valley roof is a very popular roof design.
Here is a quick summary comparing hip and gable roofing.
The top of the segment that radius creates sets the proper height of the roof.
The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off.
Interestingly you can mix and match roof styles when building a gable and valley roof designs for a cross footprint home.
In this sketch i ve drawn a simple radius line starting at the bottom center of the house and ending at the roof edge.