Steel Roof Condensation Problems

This applies to both the timber and steel trusses.

Steel roof condensation problems. If the tin roof sits on top of another material such as wood then you can get a case of wood rot. Metal roof condensation especially with a tin roof can cause serious problems when the metal sweats or rainwater collects under the tin panels. The key to getting condensation to evaporate is air flow. Metal gets cold faster than other items so condensation begins on metal first.

Having ventilation holes around the roof at eaves level and in the gable walls allows moisture rich air to escape. It can lead to roof leaks even if rain has not occurred for several days. That excess moisture ends up as drops of condensation on the roof. Frequent stress from coil slitting cutting and rollforming panels.

Condensation happens when moisture filled air contacts anything that is below the dew point temperature. In the case of the timber trusses and purlins they will rot and eventually lose their stability. Inadequate space allotted for thermal expanding and contracting of the panels. The lower the pitch of a metal shed roof and also the deeper the corrugations the worse the problem of metal roof sweating.

Having vents in all elevations of the shed is an effective way of minimising metal roof sweating. Improper usage handling and storage by installers. Although condensation in roofs may not seem like a serious problem it actually is. Essentially condensation occurs at night when the temperature inside a building is warmer than outside.

Condensation on metal roofs can be a problem once the weather starts to get cold. It is the leading cause of the deterioration of trusses. Picture a cloud of moisture floating overhead between the rafters. Changes to the structure s original form that puts tension on or moves the panels.

This video shows what a significant condensation problem can look like.