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Perforated Metal Panels - Metal Roofing and Siding Blog

Dec. 23, 2024

Perforated Metal Panels - Metal Roofing and Siding Blog

What are perforated metal panels?

Perforated panels are metal panels that have a predetermined series of perforations (or holes). The holes can be of various sizes across the entire panel or only within the major panel ribs. Common substrates for perforated metal panels include Galvalume® and aluminum. There are three basic types of perforations: round holes, square holes, and slots. 

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Perforated panels are most commonly used to increase light and ventilation, and they are an excellent source of sound absorption.  Consequently, typical uses for perforated metal panels include soffits, gymnasiums, equipment screens, and structures like parking garages.

The photo above is of a project in Austin, TX., that utilized three different colors of gray perforated panels.  This application allowed light to filter into the parking deck and car fumes to exit the structure while providing enhanced protection from weather elements. 

Considerations:

  • Lead time:  Some larger manufacturers stock perforated material for some of their most common panel profiles.  When that is the case,  lead-time is usually the same as a non-perforated panel.  But when manufacturers don&#;t stock the requested material in perforated, contractors should expect longer lead times and minimum quantities since they are considered special orders.  For example, at McElroy Metal, we stock perforated material for our

    Max-Rib

    ,

    Multi-Rib

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    l but have completed projects like the parking garage photo above with many of our other profiles.
  • Price:  Perforated panels involve an extra step in the production process, so the cost is higher than non-perforated panels. Coils for non-perforated panels are produced at a steel mill and then sent to a coating company to apply the appropriate finish.  Once the finish is applied, they are sent to the panel manufacturer for production into the desired profile.  Conversely, the coil used to make perforated panels makes an extra stop along the way because it is sent to a third-party perforator after the coating is applied and before being sent to the panel manufacturer. This extra step involves additional production, transportation, and packaging costs, so the end product is naturally more expensive.
  • Load Carrying Capability:  Perforating panels impacts their load-carrying capability. However, since these panels rarely perform in a structural capacity, this fact is often irrelevant.  If you have concerns about the structural impact of perforating panels, please

    contact us

    to chat with a member of our engineering staff.
  • Warranty Considerations:  Since the coating process occurs before the perforating process, there is typically no warranty at the perforated areas. While this sounds alarming, it&#;s important to remember that there&#;s no exposure to mother nature with interior application use.  Consequently,  the benefit of the perforated panel tends to outweigh the warranty loss. 

In summary, perforated metal panels can be an incredibly cost-effective way to address sound, lighting, and ventilation challenges on projects of all scopes and sizes.  Contact us today to discuss your project specifics.

Perforated Metal Panels

Double Return

Double Return is the most versatile perforated metal panel system. Panels are attached directly to the steel structures, or any other substructures designed and provided. With the Double Return system, the designer has the option to create the panel mount either horizontally or vertically.

There are two different variations of the Double Return system:

Long Span System

Long Span Panels have a broader flange to provide strength and rigidity to allow the panels to be fastened on the short edge only. Depending on the available substructure, panels can be installed in either vertical or horizontal orientation.

Short Span System

Short Span Panels have a thinner profile as the panels are fastened on the long edge. Depending on the available substructure, panels can be installed in either vertical or horizontal orientation. Double Return Short Span system is the most economical option.

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