Tpo Roof Minimum Slope

This means that the rise of the slope goes up or down 8 inches for every 12 inches.

Tpo roof minimum slope.

The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. To put it in perspective the angle of this slope would be around 30 degrees. Tpo performance that s proven to stand the test of time a recent study of everguard tpo roofs installed between 8 and 16 years ago found they all performed above astm standards. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

This is the minimum pitch or slope a roofing deck can be in order to install composition roofing shingles on it. With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels. Tpo is a type of membrane roofing suitable for flat and low slope roofs. Tpo rubber roof between house and garage breezeway.

You can read our article about calculating slope for information on the various roof slope notations. For standing seam metal roof panel systems a 1 4 12 minimum roof slope is prescribed. 1 16 12 in 12 maximum slope fully adhered system. Asphalt shingles minimum roof slope roof pitch r905 2 2.

The minimum roof slope for metal roofs is dependent upon the roof profile. Minimum pitch for metal roof. An example for a steep sloped roof is 8 12. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope.

This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. This 1 4 12 minimum roof slope requirement also applies to spray polyurethane foam spf roof systems in new construction. This means the roof needs to have a slope going down to drain water off it of at least 3 per foot for every 12. Roofing calculator in the building trades the acronym tpo stands for thermoplastic polyolefin a material originally developed for pond liners and used extensively for roofing since 1989.

1 16 12 in 12. The minimum slope for a flat roof is 1 4 per foot or 1 4 12 but some owners or insurance companies require a minimum slope of 1 2 per foot. Ponding is defined as water that has not drained or dissipated within 48 hours after rainfall. Tpo s long term heat uv and natural fungal resistance plus flexibility without need for plasticizers also make tpo a reliable low slope roofing system.

Asphalt shingles can only be installed on roof slopes of 2 12 or greater. Maximum slope mechanically attached system. Technically we are talking about low slope roofs that have a slope less than or equal to 3 12.