Aaron Fude wrote:
Hi,

This topic had come up before, but I keep getting conflicting advice
so I wanted to dedicate a thread to it.

When boxing in skylights, I being told that one does not want to use
drywall for the skylight window bay. The supposed reason: either the
hot air, or the humidity, or the intense sunlight will rot the drywall
over time and one ought to use plywood. In this newsgroup, I believe,
I only heard the opinion that this is either total nonsense or, at
best, obsolete old school idea.

So, if you do agree with plywood over drywall, please post your
opinion and your reasoning.

Many thanks in advance,

Aaron
Back in the stone age, when the frosted bubble skylights (which have
lotsa humidity problems) were popular, my father always recommended to
clients that they be cased out in whatever wood the room was trimmed
with, with a water-resistant finish. He always put the bubbles up on
about a six-inch curb to aid in waterproofing, and most were on the
then-popular 'California Style' T&G over beam Flying Wing roofs. Made
the 'tunnel' up to them about 8-10 inches, doable with 1x planks or
cabinet-grade plywood. Not many skylights on 5-12 dipped-in-brick
Cleaver houses, or 12-12 colonials. (T&G 2x, plus 3" celotex under
tar'n'gravel hot mop, made for roof snow melting very fast. I notice a
lot of California roofs here in snow country are now a lot thicker, with
new edge trim to hide the 8+" of foam panels that were retrofitted under
the new membrane roofs. Natural gas was a lot cheaper back then....)

--
aem sends...