Metal Roof Over Shingles Condensation

Things to know about metal over shingle roof problems.

Metal roof over shingles condensation.

Picture a cloud of moisture floating overhead between the rafters. As it cools it can t hold as much moisture. Drip stop applied to the underside of your. It doesn t matter if the air space is a half inch or six inches because the condensation factor will remain the same.

That excess moisture ends up as drops of condensation on the roof. The condensation occurs most commonly on the roof as the warmest most moisture laden air rises to roof level. The cold metal in contact with the warm air means that water droplets condensation forms on the inside surface of the shed roof. Both metal and shingle roofs are great options for your next roofing project.

Doesn t provide the flattest surface for the metal roofing to be installed over each course of shingles is about a 1 8 higher than the course just below it. In the cooler times of the year when metal is cold the warmer moisture in the building moves into the attic hits the metal roof and condenses on the underside. Put the steel down directly on a vapor barrier. If there s no air space the moisture never dries out and can lead to premature degradation of the metal roof.

Warm wet air rises and meets the cold roof and cools. If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems. Those drips from ceilings and surface moisture occur when warm air comes in contact with the cooler roofline or walls. Quite quickly the metal becomes cold enough so that it reaches what is known as the dew point.

Metal roof over shingles condensation metal roofs must be laid flat on a vapor barrier because steel will condensate if there s any air space underneath it. Essentially condensation occurs at night when the temperature inside a building is warmer than outside. When temperature and humidity conditions reach dew point moisture can condense on the underside of metal roofing and potentially cause water damage to the inside of your customer s building.