Metal Roof Over Shingles Condensation

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

Metal roof over shingles condensation.

Essentially condensation occurs at night when the temperature inside a building is warmer than outside. When installed on standard residential construction consisting of typical attic insulation proper and well functioning ventilation and roof decking metal roofs do not pose a condensation risk. The condensation occurs most commonly on the roof as the warmest most moisture laden air rises to roof level. If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems.

Both metal and shingle roofs are great options for your next roofing project. As it cools it can t hold as much moisture. However not all homes have these things and on occasion contractors will even install metal roofs on homes without roof decking. The cold metal in contact with the warm air means that water droplets condensation forms on the inside surface of the shed roof.

Things to know about metal over shingle roof problems. Quite quickly the metal becomes cold enough so that it reaches what is known as the dew point. No matter the roofing material preventing or minimizing condensation can be achieved with careful design of a building s roof system including the use of vapor retarders insulation ventilation or moisture barriers. After all you ll be making a significant and long term investment.

Those drips from ceilings and surface moisture occur when warm air comes in contact with the cooler roofline or walls. Although all roofing materials can be subject to condensation a benefit of metal roofing over other materials is that metal doesn t absorb moisture.