Moisture Dripping From Ceiling

[3KillerBs]

I really don't understand why it does it.

When warm, moist chicken breath (and the warm, moist steam off their poops), rises to touch cold metal the moisture condenses.

Chickens put out a lot of heat and moisture because of their high metabolism.

 

[hayley3]

When warm, moist chicken breath (and the warm, moist steam off their poops), rises to touch cold metal the moisture condenses.

Chickens put out a lot of heat and moisture because of their high metabolism.

My chickens are not there until I let them out of their door. This was before I let them out.
They are in their coop, which thankfully does not do that. There's some kind of white cloth on the ceiling of my coop.

 

[humblehillsfarm]

This is a great example as to why moisture barriers are necessary for all metal roofs. I wouldn’t worry about it this winter but if you felt up to the task it’s super cheap to buy a foam board moisture barrier and easy to unscrew bolts to remove the roof. A moisture barrier will help moderate summer temps too.

 

[OhZark Biddies]

This is a great example as to why moisture barriers are necessary for all metal roofs. I wouldn’t worry about it this winter but if you felt up to the task it’s super cheap to buy a foam board moisture barrier and easy to unscrew bolts to remove the roof. A moisture barrier will help moderate summer temps too.

necessary? all?

 

[humblehillsfarm]

necessary? all?

I’m not exactly sure what you mean. If you don’t want your rafters to eventually rot, in my opinion it is necessary. I’m sure there are roofs that haven’t had issues with condensation, but I’m just not sure why you’d want to find out the hard way.

 

[OhZark Biddies]

I’m not exactly sure what you mean. If you don’t want your rafters to eventually rot, in my opinion it is necessary. I’m sure there are roofs that haven’t had issues with condensation, but I’m just not sure why you’d want to find out the hard way.

necessary and all, are pretty absolute statements

I have a shed that is 40 years old that has no foam moisture barrier and it’s rafters are fine... I’ve never seen condensation drip from inside it either. It doesn’t even have any water stains on the purlins.

I can think of about 3 barns near me that are at least 80 years old and probably another 10 that are 60 years old... they all have metal roofs and no rotted rafters.... and these are all in the Midwest where there is high summer humidity and winter weather.

I‘ve also installed and removed metal roofs over existing asphalt shingles, and while there are some best practices, there aren’t really any absolutes.

The biggest issue I’ve seen is actually that the heat and cooling of the metal will cause a certain number of screws to back out over the course of time and cause leaks.

But my point is, I know of very few out buildings new or old that have any kind of moisture barrier under the metal... so the statements that it’s “necessary for all” is simply untrue.

Would it be a good idea in some applications? Sure. And there are probably regions or situations where it might be required, but it’s far from an absolute.

Chicken coops vary so much, particularly in different regions, but the ones that have the most condensation issues are generally the ones that are small and are too tightly built without enough ventilation.

But I’m sure there are larger lean-to types that have condensation from the metal also.

 

[chickengr]

The ridges on the roof run parallel to the rafters and then there’s boards that run perpendicular to them.
View attachment 2461178
and, no, I don’t have any house wrap handy.

more ventilation would change nothing. I have similar roof in my porch, 3 sides open. every morning (even in summer) I find moisture dripping.