It is so called because its shape resembles a butterfly s wings.
Roof hip and valley of butterfly roof.
Discover the 36 different types of roofs for a house.
A butterfly roof sometimes called a v roof is a form of roof characterised by an inversion of a standard roof form with two roof surfaces sloping down from opposing edges to a valley near the middle of the roof.
The triangular sloping surface formed by hips that meet at a roof s ridge is called a hip end.
On a related note the pitch properly the slope of a hip or valley rafter will not be the same as the pitch of the adjacent roof sections.
Hip roof also called hipped roof roof that slopes upward from all sides of a structure having no vertical ends.
A hip roof hip roof or hipped roof is a type of roof where all sides slope downwards to the walls usually with a fairly gentle slope although a tented roof by definition is a hipped roof with steeply pitched slopes rising to a peak.
The hip is the external angle at which adjacent sloping sides of a roof meet.
Butterfly roofs are commonly associated in the us with 20th century mid century modern architecture.
Thus a hipped roof house has no gables or other vertical sides to the roof.
This video shows the erection procedure for a broken hip and valley roof.
Broken hip and valley roof are formed on an l shaped building when the two sides ar.
While the slope of the common rafters are expressed as x in 12 the slope of the hip and valley rafter on the same roof will be x in 16 97 so where two roof sections intersect to form a 90 angle a regular hip or valley and each roof.
This gallery includes terrific roof design illustrations so you can easily see the differences between types of roofs.