Profiled Metal Roofing Minimum Pitch

The pitch is measured in inches of vertical rise per foot of horizontal run and the 5v crimp profile shown above requires a minimum slope of three in twelve or 3 12 3 inches vertically per 12 inches horizontally.

Profiled metal roofing minimum pitch.

The pitch of a roof is expressed in a ratio of rise over run creating a theoretical triangle with these numbers to illustrate the amount of slope. In fact the larger the first number becomes the steeper the slope. Minimum sheet thicknesses the depths of trapezoidal profiles are typically. Anything above that will require you to put out higher cost because they are already considered as higher pitch.

At sheffield metals we also recognize low slope as 3 12 and below. The standard of lower pitch actually ranges between 1 12 to 5 12. Determining which panel is the right choice for the slope on your project will depend on the manufacturer s minimum slope factor for that specific panel profile. Profile in the context of metal roofing means the shape that the sheet of metal is bent into to form the panels.

The design of the roof system has to protect the structure from the elements and be installed according to the international residential building code. Most metal roofs will have minimum pitches of three in twelve but this might sometimes go down depending on whether there are special installation procedures issued by the manufacturer regarding that particular roofing material. Trapezoidal profile roof sheets. Roof decks must have an approved roof covering.

Profiled metal roofing design guide. The profile sheets are typically coated steel but can also be supplied in aluminium and have mastic seals located in the end and side laps. The roof must have a 2 percent or inch per 12 inches slope for new roofs. A low slope roof is defined in the industry as a roof that has a pitch equal to 3 12 or less.

The profile is made up of a series of corrugations each in the shape of a trapezium refered to as trapezoidal profile which lap together side to side and end to end making it very easy to cover varying areas of roof quickly. The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot. The following table provides the minimum required. The minimum pitch allowed for metal shingles is a 3 12 ratio whereas metal panelling can be applied down to a 1 12 ratio.

The minimum pitch for metal roof shingles and lapped non soldered panels is 3 12. Minimum pitch for metal roof for the most part the minimum pitch for metal roof installations depends on what kind of material you are installing and the method in which the material is being fastened. The minimum pitch for metal roofing varies depending on the profile of the metal. Run in degrees and as percentage the minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

3 2 roof pitch 5 3 3 end laps 5 3 4 side laps 6 4 0 thermal performance 7 4 1 regulations 7 4 2 u values 7.