Do *any* metal roofed sheds, NOT sweat?

Not building a metal shed is a much better choice.

Plastic would be preferable for a small shed, brick for a bigger one. Or wood if you're over 60, otherwise it won't outlive you.

shen said:

Option 1 is the better choice. A breathable roofing membrane under the steel helps reduce condensation by allowing vapor to pass while limiting contact between moist air and cold metal

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This makes no sense. You’re going to put a membrane that allows water vapour to pass, under metal to prevent water vapour from reaching the metal and condensing?

shen said:

Option 2 (polystyrene) is not ideal because it can trap moisture and is harder to keep fully sealed long-term

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This also makes no sense; it either traps moisture (in which case it seals well) or it doesn’t seal well (in which case it doesn’t trap moisture)

shen said:

Good ventilation plus a proper breather membrane is the more reliable approach for corrugated steel roofs.

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Fit insulated steel sandwich panels, be done with it

Like we were with this thread, 6 months ago!?