Methods of cutting metal panels on-site that are most effective

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The fundamentals of understanding this common construction practice—from field-cutting techniques and proper tools to suggestions for preserving the appearance and longevity of metal roof and wall panels

The fundamentals of understanding this common construction practice—from field-cutting techniques and proper tools to suggestions for preserving the appearance and longevity of metal roof and wall panels.

Field cutting of metal panels, particularly in the case of framed openings, is a viable alternative to cutting in a manufacturing facility in some circumstances. Although most metal panel manufacturers will allow (and even encourage) installers to cut metal roofing and wall panels on-site, there are certain dos and don'ts when Metal roofing colors comes to recommended cutting methods, tools, and even the location where the cutting is done in order to protect the panels from damage and ensure the longevity for which metal panels are known, including

An Overview of Field Cutting Metal Panels to Extend the Life of the Panel

Methods, tools, and even the location of where the cutting is taking place can all have an impact on the performance and appearance of the metal panels that are being cut on-site, which is why it is critical to adhere to specific protocols and guidelines when cutting metal panels on-site. The following are examples of best practices:

Methods: When cutting metal panels on-site or in the field, it is critical to protect the cut edges in order to maintain the structural integrity of the panels as a whole. The best results will be obtained by closely replicating the cutting process used in the manufacturing facility. This will also serve as a guide to the level of quality you should be aiming for.


As a starting point, it should be noted that metal roof and wall panels are typically made from Galvalume®-coated steel coil due to its long life and protective properties. When cutting the coated metal coil, manufacturing facilities use tools and methods that help to protect the cut edge from deterioration (such as rust and corrosion). The coated metal is also cut to length during the fabrication process. This is accomplished either by shearing when the coated metal is flat before entering the roll former or by using a profile shear as the panels exit the roll former. These techniques are used to "wipe" the Galvalume coating across the cut edge of the metal panels, resulting in superior corrosion protection along the cut edge of the panels.

The edge of the steel should be protected from corrosion by following recommended strategies and protocols in the event that field cutting is required once the panels have been delivered to their final destination.

It is preferable to cut the metal panel down on the ground rather than on the roof or over other metal panels when cutting metal panels. What is the reason? Swarf (fine particles of steel debris) is produced whenever metal is cut, and it will fall from the cut area whenever metal is cut. If these particles land on the roof, they have the potential to cause permanent staining. Furthermore, if a large amount of accumulation occurs in a single location, it has the potential to rust completely through the Metal roofing types panel, resulting in long-term problems. Therefore, you would want to make the panels in such a way that the scrap can be captured and properly disposed of in the event that it is not captured.

Tools: When field cutting is required, metal roof or wall panels should be cut with a tool that prevents edge rusting, such as nibblers, snips, or shears, to ensure that the edges are not rusted. The use of tools such as saws, grinding wheels, or torches should be avoided at all costs because they are likely to leave irregular or rough edges that are no longer coated or finished, resulting in the development of corrosion and rust. As a result of the fact that a skill saw blade or other abrasive blade will spit out significant amounts of swarf into the air and down onto any panels below (see recommendations about cutting location above), the swarf will embed into the panel coating, causing the area to rust.