Roof Hip And Valley Of Butterfly Roof

Divide the rise by the run the run is 12.

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. Find the square root of the result. Not only are the upfront costs higher than with conventional roofs but the maintenance will also. 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.

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. The hip and valley factor varies according to the slope of the roof as shown in the table below. A butterfly 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. Valley gutters are often lined with felt or even.

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. 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. The roof type in question has a number of different names including inverted pitch roof butterfly roof and even london roof. It is so called because its shape resembles a butterfly s wings.

Butterfly roofs are commonly associated in the us with 20th century mid century modern architecture. The complexity of the design makes the butterfly roof more expensive. When the building is square the hip roof is pointed at the top like a pyramid.