Roof Pitch Information
- Roof pitch from 5/8:12 (3°)
- Use of seam sealant tape with roof pitches between 3° and 7° (5/8: 12 to 3:12)
The double standing seam can be used for roof pitches from 5/8:12 (3°). Seam sealant tape should be used with roof pitches between 3° and 7° (5/8:12 to 3:12) and any risk of ice dams forming at the eaves. The profile is folded manually or by using roll formers. The seams can be closed by using a seaming machine or by hand.
The installation of pre-formed standing seam panels has become the standard.
Tapering areas and even concave and convex surfaces can be covered using the double standing seam.
Panel Widths / Metal Thicknesses
- Common panel width 15.7" - 16.7"
- Metal thicknesses 0.7 mm / 0.8 mm
- Standard panel length up to 52'
The panel width of approx. 16.7" is the North American standard for double standing seam roofs, with metal thickness of 0.7 mm. However, given our practical experience with construction we recommend limiting the panel width to 16.7" in the case of monopitch roofs with roof overhangs and using the metal thickness 0.8 mm. This will minimize noise being caused by the natural deflection of panels in high winds.
The usual maximum panel length is up to 33', although in special cases max. 52' is also possible. The roof pitch is however then limited to max. 2:12 here. In such cases the fixing and connection details for the panels must be adapted to the increased length.
If the max. possible panel length is not sufficient, individual lengths can be attached with cross-joints.
- Concave and convex panels
- Tapering panels
The minimum radius for convex standing seam panels is 24". It is possible to install not pre-curved panels from a radius of 40'. With smaller radii the panels have to be folded up by hand and stretched with a hand form tool or bending machine.
Where concave panels are concerned, seams must be folded by shrinking, something that is technically more difficult than stretching. As a result, the minimum radius for concave standing seam panels is 8'. It is possible to install not pre-curved panels from a radius of 82'.
Tapering panels are used when it is a question of building roofs over curved footprints or providing customised detailing in the case of valleys. The width of tapering panels should be min. 4" and max. 29" depending on the wind loads to ensure they can be produced by hand. A width of max. 21" should be observed for monopitch roofs.
RHEINZINK roof systems use seam techniques that are attached indirectly using fixed and sliding clips.
Clip spacing and type should be confirmed by a registered engineer.