ROOF EDGE DETAILING · PLATE ALUMINUM PANELS

Parapet Details for Plate Aluminum Wall Panels: Keep the Wrap, Protect the Roof

Plate aluminum panels give a facade crisp edges and a solid, monolithic look — and architects often want that look to wrap right over the top of the parapet. The question is how to get it there without turning the panel installer loose on a brand-new roof.

PanelPlate Mini roof edge detail (PP-M-02).

Why plate panels end up wrapping the parapet

Plate aluminum panels are solid aluminum sheet — typically in the 0.080″ to 0.125″ range — fabricated with formed returns and set on a clip or rail system. Because the panel edge is clean and rigid, designers like to carry it over the parapet so the wall reads as one continuous volume instead of stopping at a strip of coping.

That wrap-around look is worth keeping. The problem is usually how the top of it gets attached.

Where the typical detail goes wrong

• Fasteners through the new membrane. Clips, sub-girts or cleats for the top panel are often fastened down through the parapet cap after the roofer has finished.
• Edge metal the roofing manufacturer didn’t furnish. A panel-fabricated cap is usually outside what the roofing manufacturer supplies and warrants.
• Trade sequencing. The panel crew works on top of a completed roof, and responsibility for a leak at the edge gets murky.
• Wind uplift. The perimeter sees the highest wind loads, and the IBC (Section 1504.5) requires low-slope roof edge securement to be tested to ANSI/SPRI ES-1.

Heavier panels make the top attachment matter more

Plate aluminum is heavier and stiffer than composite panel, so the attachment at the top course has real work to do — resisting wind and holding a rigid panel in line along the parapet. That’s exactly why the attachment point shouldn’t be improvised on top of a finished roof membrane.

The PanelPlate approach

PanelPlate lets the architect keep the wrap-around look of the metal panel at the parapet. Instead of the panel installer screwing through a brand-new roof, the PanelPlate Mini brackets are flashed in by the roofer as part of the roofing work. The panel installer then secures the plate panels to the brackets — not through the membrane.

Each trade stays in its own lane, the design intent stays intact, and the roof edge is detailed to protect the roof warranty instead of putting it at risk. See the installation instructions, the ACM & composite panel roof edge detail, and why the panel-wrapped parapet puts the roof warranty at risk.

Compatible with the plate and composite systems you specify

PanelPlate is compatible with plate aluminum, zinc, stainless steel, ACM and MCM wall panel systems, including DRI-DESIGN®, PAC-CLAD®, Roofinox®, ALUCOBOND®, ALPOLIC®, Reynobond® and Alcotex — as well as phenolic, UHPC, fiber cement and sintered stone panels. Choose your panel, finish and color as usual — PanelPlate handles the roof edge. See it on zinc and composite panels at Sullivan County International Airport →

Checklist before you detail a plate panel parapet

• Does any panel attachment fasten through the roof membrane after the roof is complete?
• Who furnishes the edge metal, and is it tested to ANSI/SPRI ES-1?
• Will the roofing manufacturer include the perimeter in its warranty with this detail?
• What sequence do the roofer and panel installer work in at the parapet?
• How is the top course of the heavier plate panel held in line and against uplift?

Roof warranty terms vary by roofing manufacturer and project; confirm edge requirements with the roofing manufacturer and the authority having jurisdiction. DRI-DESIGN, PAC-CLAD, Roofinox, ALUCOBOND, ALPOLIC and Reynobond are trademarks of their respective owners. PanelPlate is an independent company and is not affiliated with or endorsed by them.