Flat Sloped Roof Pitch

The smallest pitch of a roof is 0 5 12.

Flat sloped roof pitch. These new roofs can be either low sloped less than 2 12 functional roofs or high pitched greater than 2 12 architectural roofs depending on the expectations of the building owner. Roof pitch is the measurement of roof steepness. This means that the rise of the slope goes up or down 8 inches for every 12 inches. A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible.

So if your roof rises 4 inches for every 12 inches of horizontal length then the pitch of your roof is expressed as 4 12. Pitched roofs are attractive and also. These roofs have a pitch less than 4 12. However pitched roofs are still used as roof trusses are a very economic way of spanning between side walls.

As a roof can be made waterproof even at very shallow or nominally flat roof pitches. For example metal roofs are energy efficient options and are best installed on sloped structures. Normally 1 80 0 72 is the recommended minimum angle for a slope and this is universal across the vast majority of flat roofing systems regardless of the materials that they incorporate. Steeper roof pitches are better at shedding rain and snow and are used more frequently in wetter colder areas 2.

That way you know the process. Pitched roofs come in a variety of styles such as gable cross gable and hipped all of which are sloped to different degrees. Flat roofs which aren t perfectly flat require a small slope to allow for water runoff. In general the minimum slope for a flat roof is 1 0 but as stated earlier this is only possible in theory.

A common choice for flat roofing material is epdm rubber as it is highly durable waterproof and can be made from recycled materials. How to make a flat roof have a pitch general steps obviously you shouldn t do the work all by yourself. Flat roofs have no slope and are available in built up single ply. Since they vary in quality as well as method of installation the choice preferred for a flat roof will ultimately have an effect on the final slope of the flat roof.

Generally such roofs have a pitch ranging from 1 2 12 to 2 12. The way pitch also known as roof slope is measured is rise over run. A completely flat roof is a poor design as water and snow will collect on it eventually leading to your roof collapsing in from the weight of it all. An example for a steep sloped roof is 8 12.

The reason we included this section is to give you a good idea of how to build a sloped roof over a flat roof.