"Tim Lamb" wrote in message
...

Repeat of comment in earlier thread..... uninsulated steel roofing plus
frosty night = morning condensation drips. Single skin asbestos cement is
porous and seems to cycle condensate without dripping.

Not so.
My single pitch garage roof is single corrugated asbestos panels and drips
badly after a frosty night.

The slope angle of the roof may decide whether the drips run down or drip
off.
Does anyone know the critical angle? ( but it probabaly depands on the
material)

Apex roofs with steeper slopes may acheive sufficient pitch angle to prevent
dripping.

Roger R