Min Metal Building Roof Pitch

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.

Min metal building roof pitch.

Asphalt shingles require a minimum roof pitch of 2 12 or greater. The minimum roof slope for metal roofs is dependent upon the roof profile. Panels joined with an applied lap sealant can go as low as 12. The minimum pitch allowed for metal shingles is a 3 12 ratio whereas metal panelling can be applied down to a 1 12 ratio.

With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels. Not only can low slope metal roofing contribute to the bottom line it can also contribute to leed credits which are awarded to buildings that use high recycled content and other green construction materials. Various materials can serve as sturdy roofing materials from metal sheets to clay tiles to protect the building from the elements. Let us recap on the minimum roof pitch required for each type of roofing material.

To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. Metal roof slope is expressed by a ratio indicating the roof pitch which notes the vertical rise of the roof in inches for every 12 inches the roof runs horizontally in other words dividing the vertical rise and its horizontal span. For each type of roofing material you can see the actual language used in the model 2018 international building code at the international code council website. This link will take you to section 1507 requirements for roof coverings to jump to the subsection for your type of material click the name of the material in the code index on the left side of the page you may have to click on the.

The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Profiles with a higher ridge at the panel connections can be installed lower. After that the miimum pitch for metal panels depending on the methods used to join the panels.

Pbr which is typically used for industrial metal buildings can be installed as low as half inch pitch for example. Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater. However you can only use this pitch with built up roofing or specialized synthetic roofing. The minimum pitch for metal roof shingles and lapped non soldered panels is 3 12.

Corrugated metal roofing has the same minimum pitch. Metal roof shingles require a minimum roof pitch of 3 12 or greater.