A number of factors must be considered when attempting to comprehend this common construction practice, including field-cutting techniques and the appropriate tools, as well as recommendations for maintaining the appearance and long-term durability of metal roofing and wall panels.

For framed openings, it is possible to cut metal panels on site, which in some cases represents an attractive alternative to cutting metal panels at a manufacturing facility in some situations. For the reasons stated above, the majority of metal panel manufacturers will allow (and even encourage) installers to cut metal roofing and wall panels on-site in order to prevent damage to panels and to ensure the long-term durability for which metal panels are known. When it comes to ensuring the longevity for which metal panels are renowned, there are a few dos and don'ts to keep in mind. These include recommended cutting methods, tools, and even the location where the cutting is carried out, all of which are important considerations.

This section contains instructions on how to field cut metal panels with the goal of extending the panel's life expectancy as much as possible. 

Because of the long service life and protective properties of Galvalume®-coated steel coil, as well as the fact that Metal roofing panels and wall panels are typically made from Galvalume®-coated steel coil, this is an excellent starting point for metal roofing and wall panels. Manufacturing facilities use tools and methods that are specifically designed for this purpose in order to protect the cut edge of the coated metal coil from deterioration (such as rust and corrosion). Furthermore, when it comes to the fabrication process, the coated metal is also cut to the proper length before being assembled.




Two methods of shearing the coated metal are available: either shearing the coated metal when it is flat before entering the roll former, or using a profile shear as the panels are being removed from their respective rolls of coated metal, as shown in the diagram. It is necessary to follow the following steps when wiping the Galvalume coating across the cut edge of metal panels:Consequently, as a result of this practice, the cut edges of metal panels are more effectively protected against corrosion.

In the event that field cutting is required after the panels have been delivered to their final destination, it is recommended that the edge of the steel be protected from corrosion by following the strategies and protocols that have been established.

Metal panels should be cut down on the ground rather than on the roof or over other metal panels when removing them from a roof or from over other metal panels in order to avoid damaging the roof or other metal panels during the removal process. In this particular instance, what is the root cause of the situation? In the course of cutting metal, swarf (fine particles of steel debris) is unavoidably produced, and this swarf will fall from the cut area for the duration of the cutting process. Consequently, if these particles land on the roof, the surface of the roof will become permanently stained as a result of the particles' presence on the roof. Another issue is that an excessive amount of accumulation can cause a  Metal roofing panel to fully corrode through, resulting in long-term structural issues with the roof. When building the panels, you would want to construct them in such a way that any scrap can be collected and properly disposed of in the event that it is not collected during the building process.