Low Slope Copper Roof

The minimum roof slope for metal roof panels depend on 3 different scenarios.

Low slope copper roof.

Flat seam roofing is constructed of 18 by 24 20 oz. These panels generally come with a painted mill finish or a clear acrylic finish. See example table 8 8a. An ssr has side joints between the roof panels that are arranged in a vertical position above the roof line.

Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope. Flat seam roofing systems are typically used on roofs that are flat or have a low pitch or alternatively on very steep slopes. For a long span roof utilizing multiple seamed pan lengths transverse seams are required. A more expensive low slope or flat roof option include sealed metal roofs using copper or tin.

Copper and stainless steel can be used for low slope roofs but a fair amount of planning is involved. The lower pan is cleated to the roof deck with the indicated clearances determined by expansion calculations. Today it is rather rare that an entire roof gets covered with copper. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12.

These are soldered interlocking systems of metal panels. They are also used on curved surfaces such as domes and barrel vaults. Rectangular cold rolled copper sheets. For roof slopes less than 6 on 12 the upper roof pan is attached to a locking strip soldered to the lower pan.

First the metal must be cut down to pans no larger than 18 by 24 inches so thermal expansion and contraction won t overstress the solder joints. This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. Low slope metal panel roofing may be a standing seam roof ssr through fastened roof tfr or insulated metal panel imp roof. An average sized copper roof will cost between 30 000 to 60 000 or even more to install.

Low slope structural roofing generally used on roof pitches ranging from 12 to 3 12 consists of interlocking panels commonly called standing seam roofing that run vertically along the roof surface. Low slope metal roofs require less material which reduces the overall load on the building s structure.