MSTrad Traditional Standing Seam - MSTrad Expansion and Contraction

MSTrad Expansion and Contraction

The maximum recommended length of a Traditional Panel is 12m when profiled off site and 16m when profiled on site and the maximum width of a panel is to be 530mm. The longer the panel the more likely you are to get an 'oil canning' effect in the pan of the panel and the more difficult it is to handle and transport on site.

For roofing we recommend a minimum of 0.7mm thick for zinc and 0.6mm for copper

For facades we recommend a minimum of 0.8mm thick for zinc and 0.7mm thick for copper

It is critical that our stainless steel FIXED Clips are positioned correct to allow for expansion and contraction and for the correct spacing of both the Fixed clip and Sliding clips. Click here to view a pdf containing a diagram.

It is also important that expansion and contraction gaps are adequate around penetrations such as pipes and chimneys.

The further from the fixed point the panels are the larger the overall expansion will be and this must be taken into consideration when installing the panels around the eaves trim as well as the temperature during installation, plus a number of other factors.

For example - on hotter days the expansion gap on the end of the panel which is folded around the eaves trim will need to be larger to take in consideration for the contraction that will happen. Care must also be taken to make sure that the under fold will never expand to the extent of going beyond the end of the eaves trim.

There are too many variations to mention here, however, such things as the likely minimum and maximum temperatures, the length of the panel, the roof pitch, the orientation of the surface to the sun, the type of metal and the surface colour of the metal all need to be considered when working out the expansion and contraction.

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