Hip Roof Slope

This style of roofing became popular in the united states during the 18 th century in the early georgian period.

Hip roof slope. Modern residential hip roof construction uses common pitch ratios in general. A hip roof or a hipped roof is a style of roofing that slopes downwards from all sides to the walls and hence has no vertical sides. This will give you the rise over run or pitch. 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.

Then you ll be able to measure slope from an unfinished attic space under the roof. Thus a hipped roof house has no gables or other vertical sides to the roof. Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter. A regular hip has equal slopes on all sides while an irregular hip has different slopes on the main roof and hip end roof.

The hip and valley factor varies according to the slope of the roof as shown in the table below. So the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally. Divide the rise by the run the run is 12. A hip roof has no vertical ends.

If a roof increases in height by four inches for every foot of horizontal run it is considered to have a 4 in 12 pitch or just a 4 pitch talk in terms of pitches and you will always be understood in the roofing universe. Hip roofs on houses could have two triangular sides and two trapezoidal ones. The most common hip roof pitch ratios fall between 4 12 and 6 12 although variations occur based on factors such as snow rain and wind conditions which is because steeper hip roof pitch ratios allow for less accumulations of snow and rain on the roof and lower ratios provide less wind resistance. They are almost always at the same pitch or slope which makes them symmetrical about the centerlines.

After that you will have to try and find a good hip roof pitch calculator to make sure you can get the last of the calculations. The hip refers to the external angle formed where two adjacent sides meet. The hip roof is the most commonly used roof style in north america after the gabled roof. Or with the ends sloped inward toward a ridgeformed by the adjacent sides if the structure is rectangular.

1 pyramid hip roof roof base is a square roof sides are identical isosceles triangles 2 hip roof roof base is a rectangle two sides are identical isosceles triangles and two sides are identical trapeziums. It is sloped on all sides with the slopes meeting in a peak if the structure is square. A square hip roof is shaped like a pyramid. Easy rafters does not calculate a complete four sided hip roof but rather calculates the common hip and jack rafters for one end of a hip roof.

There are lots of things to think about and consider when taking on a hip roof style so having a reliable all in one hip roof calculator is going to be very useful for this job. Here we consider two types of hipped roofs see picture.