One type of non-load-bearing roof covering made of metal is the so-called standing seam roofing. Basically, a distinction is made between A. double standing seam, B. angle standing seam and C. strip seam. Standing seam roofing is particularly suitable for low roof pitches, as they are very tight when done correctly.
In
all three types of design, the shares (metal sheets) are attached to each other and to a substructure parallel to the roof pitch by means of rebates.
Since metal roofing is absolutely diffusion-tight, it is usually installed on rear-ventilated wooden formwork. This means that moisture that has accumulated in the construction can be removed.
A. Double standing seam
Shares that are already provided with lateral upstands are double-interlocked with the adjacent coulters (1) (seam height at least 23 mm) and rest on one (2) separation layer. By means of so-called adhesions in the folded seams, the coulters are attached to the (3) substructure at certain points. Depending on the roof pitch, the seams can also be sealed with a sealant. Double standing seam roofing can be carried out with a roof pitch of at least 3°.
Image: Double standing seam - baukobox
B. Angular standing seam
In the (1) angle standing seam, the coulters are also connected to each other with lateral upstands. However, the metal strips are only simply interlocked with each other (rebate height at least 23 mm). As a result, angled standing seam roofing is less tight and is only suitable for more inclined roofs (>25°). Here, too, adhesions are used to attach to the (3) substructure, in between there is usually a (2) separating layer.
Image: Standing seam - baukobox
C. Strip folding
The strip seam roofing is the most traditional type of metal roofing. With one (2) metal strip, the adjacent shares are attached to each other via one (3) wooden strip/trapezoidal strip, which is mounted with a lateral (4) stretch distance to the shares.
The attachment to the (6) substructure is made via a (5) separation layer. The folds are additionally covered with one (1) strip cap.
The strip cross-section must be at least 40 x 40 mm. Strip seam roofing can also be carried out from an inclination of 3°.
Image: Strip rebate - baukobox
Substructure
Since metal roofing is absolutely diffusion-tight, it is usually attached to rear-ventilated wooden formwork. In this way, moisture that has accumulated in the construction can be transported away.
Material
Suitable materials for standing seam roofing are zinc, copper, stainless steel, coated steel and aluminium. Especially with zinc and copper, an additional coating can be dispensed with, as these metals develop their own patina over time, which protects them from erosion.
baukobox.de
