Various materials can be applied to roofs, from metal shingles to clay tiles, to protect the building from the weather elements. The pitch, or slope, of a roof needs to be considered before settling on a roof material purchase.
Metal roofing can either be applied as a shingle or a panel. In general, this type of roofing cannot be applied to a flat roof; there must be some pitch to the roof for proper installation.
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. The minimum pitch allowed for metal shingles is a 3:12 ratio, whereas metal paneling can be applied down to a 1:12 ratio. 1).
Since metal roofing can be applied to multiple slopes, the material is very versatile for differing roof pitches. Keep in mind that, for very steep roofs, consulting a professional and having them install the material is the safest route to choose.