My question is directed to owners of metal buildings in warm/hot climates.
I live in Louisiana and I'm erecting a 30' x 24' metal building to use as a
workshop and the supplier of the building says I should insulate the roof
from the interior to avoid "sweating" This building will not have an HVAC
system. The insulation resembles bubble wrap with a foil finish on both
Does anyone have a problem with their roof sweating in this type of
Thanks in advance.
It's a major problem here in the Pac. NW..
Damp air under a night chilled metal roof and you get a lot of sweating.. My
car port is like rain forest since I closed it into a garage.
As long as you have outside air circulating (don't close in the sides) then
there will be very little temp. difference between the metal and the air..
I am not an owner yet but have checked into this situation some. The
one builder I talked with did say sweating is a problem. His idea
that I am not too pleased with is to install insulation similar to
what you are talking about but without the foil finish. He says the
metal roof will still sweat but the insulation will direct the
dripping water to the sides of the building where it is less of a
problem. Looks like spray on foam would be the way to go but it is
very expensive as far as I can find out. It may have flamability
problems also but I did not research that.
There are other fixes like fans and temperature control.
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