Steel Roof Condensation Problems

Condensation happens when moisture filled air contacts anything that is below the dew point temperature.

Steel roof condensation problems. Picture a cloud of moisture floating overhead between the rafters. Improper usage handling and storage by installers. When this happens the tin roof can rust and even warp. Essentially condensation occurs at night when the temperature inside a building is warmer than outside.

Frequent stress from coil slitting cutting and rollforming panels. That excess moisture ends up as drops of condensation on the roof. Having ventilation holes around the roof at eaves level and in the gable walls allows moisture rich air to escape. Inadequate space allotted for thermal expanding and contracting of the panels.

Having vents in all elevations of the shed is an effective way of minimising metal roof sweating. It can lead to roof leaks even if rain has not occurred for several days. The key to getting condensation to evaporate is air flow. Condensation on metal roofs can be a problem once the weather starts to get cold.

The lower the pitch of a metal shed roof and also the deeper the corrugations the worse the problem of metal roof sweating. In the case of the timber trusses and purlins they will rot and eventually lose their stability. This applies to both the timber and steel trusses. If the tin roof sits on top of another material such as wood then you can get a case of wood rot.

Changes to the structure s original form that puts tension on or moves the panels. Warm wet air rises and meets the cold roof and cools. This video shows what a significant condensation problem can look like. Metal gets cold faster than other items so condensation begins on metal first.

It is the leading cause of the deterioration of trusses.