Hello,

I have a steel-frame house with a steel roof assembly, Roof (steel truss, wood deck, OSB, weather barrier, asphalt shingles).

I’m worried about condensation that will happen because we didn’t use insulation between the wooden deck and steel trusses, room ceilings have 2 layers of rock wool 4.5 inches above that on 10ft is my roof.

How should I prevent condensation from happening under the roof on the steel assembly? since the vapor will rise from the house into there where the steels can be cold. I can’t disassemble my roof or the shingles.