As it cools it can t hold as much moisture.
Metal shed roof condensation.
Picture a cloud of moisture floating overhead between the rafters.
A metal shed is great for storing items or can be used as a workshop.
Why metal shed and garage roofs get condensation.
Metal roofs are known for this with condensation forming particularly at the beginning and end of a day.
It requires very little maintenance and unlike wooden sheds it is not necessary to stain or treat the outside.
Metal roof sweating is a result of excess humidity condensing on the underside of your roof.
An alternative tried and tested method of eliminating condensation from your metal garden shed is to clean off the underside of the roof panels with a methylated spirit making sure all panels are dry then purchase polystyrene tiles and attach them onto the underside of the sheds roof using a specialist spray glue that bonds polystyrene to.
There are steps to take to ensure as little condensation occurs as possible.
Essentially condensation occurs at night when the temperature inside a building is warmer than outside.
That excess moisture ends up as drops of condensation on the roof.
This acts like a giant radiator so the air inside the shed gets very warm.
The metal roof heats up quickly in the sun.
Warm air has much greater capacity to.
However the one issue that occurs with these sheds is condensation.
It took me a while to work this out but if you think of the way a solar still works that is what is happening to your shed roof.
Warm wet air rises and meets the cold roof and cools.