PILOON
Super Star Member
Still think condensation is probably the culprit.
For sure if the attachment screws are on top of the ridges it is condensation.
On the flats could be infiltration.
If screwed on the ridges then a vapor barrier could be the solution.
If the pitch is 3-4/12 and on the top of ridges I doubt it is infiltration but more like condensation or 'sweating', keeping warm moist air away from the cold metal roof is the solution.
For sure if the attachment screws are on top of the ridges it is condensation.
On the flats could be infiltration.
If screwed on the ridges then a vapor barrier could be the solution.
If the pitch is 3-4/12 and on the top of ridges I doubt it is infiltration but more like condensation or 'sweating', keeping warm moist air away from the cold metal roof is the solution.