The hip and valley factor varies according to the slope of the roof as shown in the table below.
Roof hip and valley of butterfly roof.
They were also commonly used in georgian and victorian terraced house architecture of british cities where they are alternatively termed london.
Butterfly roofs are commonly associated in the us with 20th century mid century modern architecture.
The butterfly roof lends itself to an environmentally friendly home design as pv solar panels water collection systems and natural light can all be easily incorporated.
Although a hip roof is not gabled it may have dormers or connecting wings with gables.
The complexity of the design makes the butterfly roof more expensive.
A hip or hipped roof slopes down to the eaves on all four sides forming a horizontal ridge a roofer will usually put a vent along the top of this ridge.
When the building is square the hip roof is pointed at the top like a pyramid.
The roof type in question has a number of different names including inverted pitch roof butterfly roof and even london roof.
Valley gutters are often lined with felt or even.
You can combine gable and hip designs with a cross footprint home as well.
Hip and valley roof the hip and valley roof is similar to the gable and valley except the roof ends slope inward.
It is as one of its names suggests a pitched roof but it generally cannot be seen from ground level as it is concealed behind a parapet wall.
It is so called because its shape resembles a butterfly s wings.
Not only are the upfront costs higher than with conventional roofs but the maintenance will also.
For any roof slope expressed as x in 12 rise in run the hip and valley factor is determined by finding the square root of rise run 2.