10x14 Shed

I watched a YouTube video where a guy put a metal roof on his shed and got a lot of condensation dripping off the metal.
His remedy was to put insulation between the rafters and boxing it all in, I'm no expert but if it's not too late perhaps put a wooden roof on instead.
 
Depends on climate I have metal on two roofs never had condensation but have proper ventilation in my coops that is the key
 
Depends on climate I have metal on two roofs never had condensation but have proper ventilation in my coops that is the key

Ventilation makes no difference it's the climate and location. I have an open metal carport you know the kind you see for sale all over the place for $899 and it will condense water on the under side of the roof with the conditions are correct. Insulation or location is the only thing that will stop the humidity from condensing on the metal. I say location because my run has a metal roof and it has never condensed water, but it's in a different location than the carport. The run and coop are shaded by the house in the afternoon but the carport is not.

JT
 
The physics behind condensation is that the metal roof cools off and warmer air full of moisture hits it. If the metal is at the dew point of that moist air, water condenses out of the air onto the metal. Metal is a great conductor of heat, it will cool off rapidly. If you are getting condensation you have a source of warmer moist air hitting that cool metal.

Where is that warm moist air coming from? I don't know, depends on your conditions. In Arkansas I had a metal roof shed that just poured water in the mornings in spring, the rest of the year it was pretty dry. We had a lot of fog in the spring. The shed floor was dirt and the stuff I stored in it could handle the water so it was not worth fixing.

So how do you stop the problem if you have a problem, not every metal roof does. You stop the warmer moist air from hitting the underside of your metal roof. That shed had great ventilation at the bottom and the top so ventilation was not the issue. In some conditions maybe more ventilation would help. Depends on what your source of warm moist air is.

The way you solve that on your house is with a vapor barrier. The sheathing holds a vapor barrier that blocks the moist air from hitting the underside of your metal roof. Insulation may help but the vapor barrier is what does the trick.
 
Here's what I did for ventilation in mine - cut holes and covered them with hardware cloth. The one on the left is like yours. Some type of canopy or lourve is necessary to keep wind and rain out. If I had been smart for the one on the left I would have made 3 cuts - 2 sides and bottom - and bent each piece up like an awning. These make really decent coops, btw. This is just temporary for me until I can grade a spot for another coop I will build. I' plan to eventually use these to hold kindling.

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Here's how I did a quicky roost. 2x4s resting on support braces with downward pointing L-brackets at each end to secure to shed braces; vertical 2x4 in center as support (not visible) to keep 10'-wide span from sagging. Added more short roosts at 90 degrees for further support. Those white squares at the bottom are covered over vents.

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