Tpo Roof Minimum Slope

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.

Tpo roof minimum slope. Asphalt shingles minimum roof slope roof pitch r905 2 2. Maximum slope mechanically attached system. For metal panel roof systems with nonsoldered seams with applied lap sealant ibc 2018 prescribes a 1 2 12 minimum roof slope. 1 16 12 in 12 maximum slope fully adhered system.

An example for a steep sloped roof is 8 12. Tpo rubber roof between house and garage breezeway. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Minimum pitch for metal roof.

You can read our article about calculating slope for information on the various roof slope notations. This 1 4 12 minimum roof slope requirement also applies to spray polyurethane foam spf roof systems in new construction. 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.

To put it in perspective the angle of this slope would be around 30 degrees. This is the minimum pitch or slope a roofing deck can be in order to install composition roofing shingles on it. The roof system should be designed to prevent ponding of water on the roof surface. The slope of a roof or pitch is determined by how many inches the roof rises over 1 foot or 12 inches.

For standing seam metal roof panel systems a 1 4 12 minimum roof slope is prescribed. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. 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. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.

Asphalt shingles can only be installed on roof slopes of 2 12 or greater. This means that the rise of the slope goes up or down 8 inches for every 12 inches. 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 minimum roof slope for metal roofs is dependent upon the roof profile.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Tpo is a type of membrane roofing suitable for flat and low slope roofs. Technically we are talking about low slope roofs that have a slope less than or equal to 3 12.