Roof Pitch Angle Australia

The pitch of a roof is arrived at by dividing the vertical rise and its horizontal span or what people in the roofing industry would refer to as the slope.

Roof pitch angle australia.

Hipped roofs often offer shady eaves and great strength which makes them good for high wind rated areas. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. Standard roof pitches in australia are usually either 15 degrees or 22 5 degrees depending on the materials used in the roof.

Roof pitch calculator results explained. Pitches above 9 12 are very highly angled and are designated steep slope roofs. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. Hip a hipped roof has three four or more pitched planes depending on the shape of the house and all planes slope downwards from a ridge at the top of the roof.

The incorrect roof pitch and panel angle will mean that the panels won t be able to self clean in the rain meaning that you ll have to manually clean them more often and the panels may not be effective if incorrectly installed. The most commonly used roof pitches fall in a range between 4 12 and 9 12. You haven t said whether the house is one storey or two as it can make a difference. For example if you reside in sydney a roof pitch of 34 would be considered ideal as this is equal to the latitude angle 33 86 of the nsw capital.

This type of roof is the most popular in australia. A 4 12 slope is enough to accommodate water runoff but is not suitable for regions that are affected by heavy snowfall. Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length.

This means that for best results the roof pitch of your property should ideally be equal to the latitude angle with the panels mounted at the same angle as the roof. Generally single storey houses suit a flatter roof around 20 degrees while a double storey can go to 30 degrees without looking out of place. Roof pitch in layman s language simply refers to the steepness of the roof. The roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need.

This forms an angle of 18 5 between the horizontal section and the roof and creates a gentle incline that is seen as a midpoint between a low pitch and medium pitch roof.