Pole Barn Metal Roof Condensation

The reason why condensation forms on the metal roof is that it s temperature is below the dewpoint of the internal air.

Pole barn metal roof condensation.

This is often accomplished using vinyl backed fiberglass insulation to prevent humid air from coming into contact with the cooler metal roof which may be at or below the dew point. In my case i planned to use osb on the sides and roof asphalt shingles up top. Post frame building condensation will be particularly common in winter time in regions where temperatures reach dramatic lows and also in spring and early summer when ground temperatures are still cool but humidity increases. That excess moisture ends up as drops of condensation on the roof.

Traditionally condensation is managed by insulating the metal roof so that the panel temperature never reaches the dew point. Every year when the temperatures change rapidly and the moisture is high i get condensation that fills up the roof insulation along the intersection of the roof and the top girt. Condensation occurs when excessive atmospheric water vapor comes into contact with a cold surface. I m looking at a pole barn with steel trusses made of 2 2.

As it cools it can t hold as much moisture. The radiant reflective barrier does keep warmer moist air from contacting the underside of the colder roof steel and condensing. Osb with 30 felt or equivalent between purlins and roof steel would be an effective condensation control. Insulation you use needs to be closely bonded to the metal.

I used fiberglass backed with vinyl laid under the metal roofing. Since lower temperature air cannot hold as much moisture as warmer air the excess humidity turns into water droplets. Think very wide rolls of lightweight material in the wind. Dear pole barn guru.

By adding insulation to the internal surface of the metal then the dewpoint is less likely to be met. Warm wet air rises and meets the cold roof and cools. If it has been below freezing inside your building and fairly humid water vapor will freeze to the underside of the barrier as well as the roof framing members. Can house wrap be used on the roof to help stop condensation.

Water vapor condenses when warm moisture laden air contacts a cooler surface e g the underside of your roof steel. It does sound like your problem is not from condensation but from a roof leak or leaks. Two common types of metal roof insulation are. Essentially condensation occurs at night when the temperature inside a building is warmer than outside.

They re made from recycled materials and are 100 recyclable and the end of the building s life. Our agricultural metal roof and wall panels are sustainable. Picture a cloud of moisture floating overhead between the rafters. I can think of a few reasons not to.

What is pole barn condensation.