In message , Roger R
writes

"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.

You amaze me! I have several BS5502 steel framed barns with cement
bonded fibre big 6 roofing and no drips.

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)

Agricultural pitch is around 12.5 degrees.

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

Hmm.. see comment elsewhere about sealing with paint.

regards


--
Tim Lamb