A metal roof sheds snow. That's the point — and the problem.
Everything depends on where it lets go.
Why this matters more here
A steel panel warms in the sun, the bottom inch of the snowpack turns to water, and two feet of accumulated snow releases all at once. On a steep pitch that can be several tons arriving on whatever is below it — an entry, a walkway, a deck, a gas meter, a parked vehicle, a person.
Snow retention isn't a set of decorative bars you bolt on afterwards. The layout is calculated: roof pitch, panel run length, and the ground snow load for your specific site determine how many rows you need and where they go. Get it wrong in one direction and the snow still comes down in a slab. Wrong in the other and you've built a dam that holds meltwater against your roof all winter.
We mount retention to the seam itself with clamps — never through the panel. Anything screwed through a standing seam roof to hold snow back is a leak on a timer.
Ice dams are a ventilation problem wearing a roofing costume.
Heat escaping into the roof assembly
Warm air from the house melts snow mid-slope. The water runs down, hits the cold overhang past the wall line, and refreezes into a ridge of ice.
Water backing up under the roof
The dam holds meltwater on the roof and finds its way under the covering and into the ceiling. Heat cable manages the symptom and costs you money every winter.
Ventilation and a cold deck
A ventilation mat and vapor-permeable underlayment keep the deck cold and let the assembly dry. Done properly during a re-roof, the dam never forms.
“The snow sheds on its own now, whereas before I was always out there with a roof rake busting my butt several times each winter.”
On an inspection, for snow specifically.
Pitch & run
Measured, not estimated — both drive how much force the snowpack develops.
What's below
Entries, decks, walkways, meters, and where people and cars actually go.
Ventilation
Whether the assembly is keeping the deck cold, or quietly building you a dam.
Layout
Rows and spacing against your site's ground snow load, then clamped to the seam.
Had ice dams last winter?
Book an inspection before the snow flies. Most of what causes them is fixable during a re-roof and expensive to chase afterwards.