09/03/2026
If you have a metal roof over a doorway, a walkway, a sidewalk, a gas meter or a parking stall, read this now and not in December.
Snow does not slide off asphalt shingles. It grabs the granules and stays put until it melts. Metal is the opposite. Snow sits on a metal panel for weeks, a sunny afternoon or a warm garage below melts the bottom layer, and the entire slab releases at once and comes down as a sheet.
That is an avalanche, not a snowfall. We have seen it flatten a downspout, tear a gutter off the fascia, bury a back door, crush shrubs, and dent a truck hood. On commercial buildings it lands on entrances where people walk.
Snow guards are the fix. They are small brackets or continuous rails that hold the snowpack on the panel so it melts and sheds gradually instead of letting go in one piece.
What actually matters when they get installed:
They have to be laid out for your panel type and your roof pitch and slope length, not spaced by eye. A guard that is under specified transfers load into the panel seam and can damage the roof it was supposed to protect.
Attachment method matters. On standing seam, clamped guards that grip the seam avoid new holes. On exposed fastener panels, mechanical attachment has to hit structure, sealed correctly.
Adhesive mounted guards exist and can work, but adhesives cure to temperature. That is the real reason this is a September job and not a January one.
They go where people and property are, not across the whole roof. Entrances, walkways, garage doors, meters, HVAC, parking.
Pole barns and outbuildings count. That is a lot of roofs in Boone and Winnebago counties.
If you have metal over anything you care about, get it looked at while it is still 70 degrees.
(815) 623-0070 https://superiorroofinginc.com