Ice On Roof Nails In Attic

The nails there are icy too but the rest of the roof sheathing and trusses look fine.

Ice on roof nails in attic.

My question is is a little bit of frost normal in canada. At times there was ice and frost on the nails. My wife ali and i bought an old house 18 months ago. It should to a degree.

The nails in my attic have frost and ice on them. Frost on nails is frozen condensation. As extra insurance against roof ice dam leaks when re roofing use ice and water shield at the building roof eaves running this impermeable membrane it even seals around nails up the roof at least three feet or in some climates or on problem roofs up six feet or more. Our photograph above shows roofing nails which have rusted and stained the roof plywood in an attic where indoor moisture has risen through the building to condense on the under side of the roof.

Boxes stored in the attic were sometimes wet. I have no bathroom vents or anything bad like that sourcing moisture into the attic. There s no snow on the roof but it s extremely cold here. Last winter i noticed condensation and water droplets on the nails that stick through the roof into the attic.

Our photo at left shows the typical staining pattern in an attic where there has been modest condensation at the roofing nails. Several online posts mostly from american sources say that any frost is not normal and signals impending doom. Remember the last hot and humid day you were sitting outside drinking a cold beer iced tea soda or glass of ice water. Frost on nails in attic spaces may frighten you.