Solar panels for metal & standing-seam roofs

Helios installs on every roof type, and metal is one we love because the engineering is clean: a properly specified clamp on a standing seam is both structurally strong and completely non-penetrating. Taylor's mechanical-engineering background matters here — clamp selection, spacing, and torque all have to match the specific seam profile and wind loads, and we size them deliberately rather than using a one-clamp-fits-all approach. For exposed-fastener corrugated metal, we flash and seal penetrations correctly. Either way the work is backed by our workmanship warranty.

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On standing-seam metal we use non-penetrating S-5!-style clamps that grip the raised seams of the roof. Rails (or rail-less mounts) attach to the clamps, and the panels mount to those — so NO holes are drilled into the roof surface, the membrane stays fully intact, and the roof remains watertight. This is fast and clean. Exposed-fastener corrugated or R-panel metal is different: those profiles do require penetrations, which we make through the ribs into structure and seal with butyl tape and EPDM-bonded washers rated for metal roofing. We identify your exact profile first, because the right method depends entirely on whether the seams are raised (clamp) or the fasteners are exposed (sealed penetration).

On standing-seam metal, the non-penetrating clamp method is efficient — there is no flashing to cut in and no roof material to remove — so labor is competitive even though the clamps themselves cost more than a basic shingle foot. Most SoCal systems fall in the roughly $2.40–$3.25 per watt range (before incentives, varying with size, equipment, and complexity); standing-seam typically lands in the middle of that band, and the matched lifespan of roof and panels makes it a strong long-term value. Exposed-fastener metal costs a bit more than standing-seam because penetrations have to be flashed and sealed. Note: the 30% federal solar tax credit expired December 31, 2025.

Confirm which kind of metal roof you actually have — standing-seam (raised seams, hidden fasteners) is the ideal clamp-mount case; corrugated or R-panel (visible screw heads) needs sealed penetrations. Clamps must match the seam profile and be torqued to spec, so ask how the installer selects and tests them. On older or thin-gauge metal, structural attachment and wind uplift should be verified. We check seam profile, panel thickness, and structure during the design.