Metal Roof Myths — And What's True
Four objections come up every time. Two are largely myths, one is partly true, and one depends entirely on the product you pick.
"It will be loud in the rain"
Largely a myth for a residential roof. The noise people remember comes from metal over open purlins on a barn, with nothing between the panel and the air. A house roof has a solid deck, underlayment, attic space and insulation under it.
Stone-coated steel is quieter still, because the granule surface breaks up impact sound. In Sacramento, where heavy rain is a winter-only event, this is rarely the deciding factor.
"It attracts lightning"
A myth. Metal is conductive, not attractive — it does not increase the likelihood of a strike. Where metal helps is afterwards: it is non-combustible, so it disperses energy rather than igniting, which is why metal is common on fire-exposed properties.
"It dents"
Partly true, and it depends on gauge and profile. Thin exposed-fastener panels dent more readily; 24 gauge standing seam and stone-coated steel are considerably more resistant, and many stone-coated products carry Class 4 impact ratings.
Sacramento gets very little damaging hail, so this matters far less here than in Texas or Colorado. Tree limbs and service traffic are the realistic risks, and walk pads and access discipline handle those.
"It will make the house hotter"
Backwards, with the right product. Metal does not store heat the way a tile or asphalt mass does, and a light-coloured PVDF finish reflects a large share of solar gain. Dark, low-reflectance metal in full Central Valley sun is a different matter.
The bigger lever is attic ventilation. An under-ventilated attic will be hot under any roof covering you install.
Common questions
Are metal roofs noisy in the rain?
Not meaningfully on a house, where a solid deck, underlayment, attic space and insulation sit between you and the panel. The noise reputation comes from barns with panels over open purlins.
Do metal roofs make a house hotter?
The opposite, with a light-coloured reflective finish — metal does not hold heat the way asphalt or tile mass does. Dark low-reflectance metal is worse than light, and attic ventilation matters more than either.