Metal Porch Roof Condensation

Two common types of metal roof insulation are.

Metal porch roof condensation.

Worse if the roof is over your shop carport barn or self storage unit you have to worry about what damage it is doing to the contents of these buildings. Metal roof condensation especially with a tin roof can cause serious problems when the metal sweats or rainwater collects under the tin panels. When the temperature of the roof is lower than the air inside the extra moisture in the air condenses on the underneath of the roof. Condensation happens when moisture filled air contacts anything that is below the dew point temperature.

Insulation you use needs to be closely bonded to the metal. Essentially condensation occurs at night when the temperature inside a building is warmer than outside. Traditionally condensation is managed by insulating the metal roof so that the panel temperature never reaches the dew point. It can lead to roof leaks even if rain has not occurred for several days.

Metal gets cold faster than other items so condensation begins on metal first. Picture a cloud of moisture floating overhead between the rafters. The reason why condensation forms on the metal roof is that it s temperature is below the dewpoint of the internal air. Metal roof insulation increases the temperature of the inside surface of the ceiling.

When then environment outside becomes cooler i e. That excess moisture ends up as drops of condensation on the roof. Warm wet air rises and meets the cold roof and cools. It is quite annoying to have the condensation falling on you like rain.

This in turn prevents moisture condensation on the metal roof. When this happens the tin roof can rust and even warp. If the tin roof sits on top of another material such as wood then you can get a case of wood rot. Condensation can cause your ceiling to rot.

As it cools it can t hold as much moisture. At night the thin metal in the roof quickly cools down. By adding insulation to the internal surface of the metal then the dewpoint is less likely to be met. Have you ever been under a metal roof that had condensation on the bottom side of it.