condensation from tin roof
BSRIA (I think it was) published a research paper on condensation
the underside of steel roofs. It was a common occurence in 1970s
buildings. The metal roofs radiate a lot of energy into the sky on a
clear night, causing them to cool far below the ambient air
temperature.
I came across the paper about 20 years ago. I can't recall what the
recommendations were though.
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