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Keys to understanding this common construction practice—from field-cutting techniques and proper tools to tips for preserving metal roof and wall panel appearance and longevity.

Field cutting of metal panels, particularly at framed openings, is an acceptable alternative to cutting in a manufacturing facility. Most metal panel manufacturers, in fact, will allow (and expect) installers to cut metal roofing and wall panels on-site, but in order for the panels to be protected from damage and ensure the longevity that metal panels are known for, there are certain do’s and don’ts when it comes to recommended cutting methods, tools, and even the location where the cutting is done. 

Methods, tools and even the location of where the cutting is taking place can all affect the performance and appearance of the metal panels being cut on-site, so it is important to follow certain protocols and guidelines. Best practices include:

The old saying that you only get out what you put in holds true for metal panel cutting. Using the right tools (in the right way) can ensure good results, while the wrong tools can result in an array of unfortunate and long-lasting problems, such as rust and rust stains, voiding of warranties, and compromised building service life.Among the features of good tool choices for field-cutting metal panels are those that will wipe the Galvalume coating, are cool, and will protect edges. Recommended tools include the following:

Equally important as using the right tools is NOT using the wrong tools. When cutting metal panels on-site, never use the following tools—torches, reciprocating saws, hacksaws and grinders—as they will melt the Galvalume® coating, causing edge rust just like an abrasive blade would.

In conclusion, using the right tools and following the recommendations provided by the metal panel manufacturer when cutting metal in the field will help ensure that the panels are protected from damage, while using the wrong tools can result in rust, rust stains, corrosion, and the voiding of warranties. To find out more about the best practices and recommendations for on-site cutting and installation of metal panels contact your local Star Building Systems representative.

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