Steel Roof Condensation Problems

Warm wet air rises and meets the cold roof and cools.

Steel roof condensation problems.

Changes to the structure s original form that puts tension on or moves the panels. In the case of the timber trusses and purlins they will rot and eventually lose their stability. The key to getting condensation to evaporate is air flow. Essentially condensation occurs at night when the temperature inside a building is warmer than outside.

When this happens the tin roof can rust and even warp. This applies to both the timber and steel trusses. It is the leading cause of the deterioration of trusses. Frequent stress from coil slitting cutting and rollforming panels.

Condensation happens when moisture filled air contacts anything that is below the dew point temperature. Metal roof condensation especially with a tin roof can cause serious problems when the metal sweats or rainwater collects under the tin panels. Picture a cloud of moisture floating overhead between the rafters. Having ventilation holes around the roof at eaves level and in the gable walls allows moisture rich air to escape.

Having vents in all elevations of the shed is an effective way of minimising metal roof sweating. This video shows what a significant condensation problem can look like. Inadequate space allotted for thermal expanding and contracting of the panels. Metal gets cold faster than other items so condensation begins on metal first.

That excess moisture ends up as drops of condensation on the roof. Improper usage handling and storage by installers. As it cools it can t hold as much moisture. Although condensation in roofs may not seem like a serious problem it actually is.

The lower the pitch of a metal shed roof and also the deeper the corrugations the worse the problem of metal roof sweating.