You need to apply a vapor retarder of some sort or add ventilation.
Paint to stop condensation on metal roof australia.
Metal roofs are known for this with condensation forming particularly at the beginning and end of a day.
Essentially condensation occurs at night when the temperature inside a building is warmer than outside.
Warm wet air rises and meets the cold roof and cools.
Condenstop is an effective and affordable solution to prevent condensation on metal roofing panels in containers and on tarps for trains trucks and tents.
Sta kool 8metal x is a tough white elastomeric roof coating that is formulated for exceptional bonding strength to metal roof surfaces.
Metal gets cold faster than other items so condensation begins on metal first.
How to stop a metal roof sweating 5 key points to solving your shed condensation problem metal roof sweating is a result of excess humidity condensing on the underside of your roof.
Traditionally condensation is managed by insulating the metal roof so that the panel temperature never reaches the dew point.
Water vapour carried in the air then condenses on the colder surface of the roof sheet.
The answer is a product called dr pstop which is a felt like material with a rubber backer that can be applied to the back side of metal panels that will trap the moisture as the condensation forms.
Paint will do nothing stop condensation.
That excess moisture ends up as drops of condensation on the roof.
Picture a cloud of moisture floating overhead between the rafters.
To minimise the risk of water damage to ceilings or corrosion related to condensation under steel roof sheeting a vapour barrier should be provided under the sheeting to prevent contact between the moist air in the building and the roof sheeting.
It can lead to roof leaks even if rain has not occurred for several days.
This is often accomplished using vinyl backed fiberglass insulation to prevent humid air from coming into contact with the cooler metal roof which may be at or below the dew point.