On Jun 17, 3:56 pm, "HeyBub" wrote:

Almost totally non-applicable to the OP:
* "Water vapor will condense..." Not in 0% relative humidity
* "Frost will form....." In Tuscon?
* "... problem of mildew..." Meh.
* "Ice dams..." Again, in Tuscon?



http://www.cor-a-vent.com/pdf/balancedventilation.pdf

Commercial brochure on ridge vents. Good explanation (except for the bit
about exhausting hot, HUMID, air).



and

http://www.energysavers.gov/your_hom...ling/index.cfm...

Typical government simplistic check-list. Superficial, but good,
suggestions.

Heh, heh. Absolutely right, HeyBub. Mr Barss, There are some folks
here with excellent ideas. Namely: Make sure you've got soffit vents
if you're installing ridge vent. Make sure your insulation doesn't
cover the soffit vents. If it's worth doing, overdo it (insulation-
wise). I'm not sure about those radiant barriers, as the underside of
the decking _must_ breathe very well. I roofed for twenty-plus years
in MI, and I'm looking at re-doing my roof here in Tucson pretty soon.
I'm probably going with painted standing seam metal. I wish copper was
more affordable, or I was richer... Tom