Rooftop RTU screens hide mechanical equipment from view. The right material affects cost, maintenance, airflow, and how easily your package passes plan review. This guide compares common options in plain language. It is not legal advice-always confirm with your AHJ and design team.
Your screen has to do three jobs at once: meet visibility rules, survive wind and weather, and stay serviceable for HVAC crews. Material choice drives all three. Pick something that matches your local screening rules, your engineer's details, and your building's finish schedule.
On many Type I and II commercial buildings, teams default to noncombustible steel because it lines up with common IBC expectations for mechanical equipment screens, finishes with siliconized polyester to match the facade, and holds up on hot roofs. Other materials can work when separation, height, and construction type allow-always follow the adopted code and local amendments.
Adopted codes usually ask mechanical equipment screens to be built like serious building components-not afterthought fences. In many jurisdictions, IBC Section 1511.6 (mechanical equipment screens) is the starting point for how a screen is built once screening is required. Your city may amend it.
For the official text, use the ICC Digital Codes source for the edition your jurisdiction adopted.
Steel sheet is the most common backbone for custom commercial RTU screens. Fabricators can cut panels to your equipment map, add doors for service, and siliconized polyester finish to match trim or wall panels.
Steel is heavy, so bases, anchors, and wind documentation need to match the project. For campuses with tight rules, see RTU screens for schools and RTU screens for hospitals.
Aluminum systems are lighter than steel and resist corrosion in coastal or humid air. They can be a strong match when weight on the roof or corrosion risk is the driver. Downsides include cost at thicker gauges, careful detailing around fasteners, and making sure the proposed system still satisfies structural and impact expectations for your site.
Wood can appear on some projects when separation and height triggers allow combustible materials under the adopted code. Teams sometimes specify fire-retardant-treated wood to meet limited combustibility paths. Wood needs a maintenance plan: coatings, inspection, and detailing at the roof edge so moisture does not shorten service life.
Composite and metal-composite panels can match high-end facades and come in long flat sheets. They are common in architectural cladding but less common as a full custom RTU screen fabricator product unless the architect specs a system with tested attachments. If you go this route, plan for engineered connections, panel labels, and shop drawings that tie to wind and deflection limits.
| Material | Typical pros | Watch-outs |
|---|---|---|
| Steel (standard panel / PBR / louver) | Strong, familiar to AHJs, great siliconized polyester finish color control, louver options for airflow | Heavier; needs real structural coordination |
| Aluminum | Light; corrosion resistant in wet or coastal air | Premium cost; detail fasteners and structure |
| Wood / FRTW | Can meet some aesthetic goals when code allows | Maintenance; combustibility triggers |
| Composites / ACM-style | Architectural flat panels; facade match | Engineered attachment; tested systems |
Need 26-gauge steel panels, shop drawings, and a finish that matches your building? CME fabricates custom RTU screening nationwide.
We focus on custom steel rooftop equipment screening: solid panels, louver and PBR layouts when your engineer requires set open area. We coordinate shop drawings, finishes, and field installation so the screen matches the approved package-not a generic kit trimmed on site.
We service Phoenix, Dallas, and the wider Sun Belt. If you are pricing a Sun Belt job, our Phoenix page shows how we support hot-climate plan review and freight. Dallas teams can start with Dallas for DFW-style submittals.
No. Requirements depend on construction type, fire separation, local amendments, and sometimes zoning-driven opacity rules. Steel is a common default for commercial work because it is noncombustible and easy to document, but your architect and code consultant should confirm what your specific job allows.
When mechanical engineers need a rated free area for airflow or when a city allows louver faces sized to required open area. The hole pattern, percentage open, and any acoustic needs must be coordinated with equipment cut sheets.
Sometimes, but transitions create thermal movement, finish, and attachment details that must be drawn and reviewed. If you mix systems, plan for a single responsible fabricator scope or very clear division of responsibility in the specs.
Your authority having jurisdiction and the licensed professionals of record interpret the adopted code for your site. Bring early sketches to the architect and structural engineer so material assumptions match the construction type and separation distances.
This article supports early planning only. Codes change, and staff interpretations differ. Confirm all material and assembly choices with your local building department and licensed design team before you buy or fabricate.
Ready for steel shop drawings and fabrication? Contact CME for a commercial RTU screen quote.