On Tue, 13 Sep 2011 09:47:21 -0700, Winston
wrote:

Jim Wilkins wrote:
When I reroofed the carpenter friends who helped suggested adding a mat
ridge vent, so I did. With bright sun, 81.7F in the shade, I just measured
94.6F with a thermocouple stuck up against the plywood inside. The
'charcoal' shingled roof is possible if uncomfortable to sit on.

I wonder how the 'inside plywood' number compares to the
temperature measured at the surface of the shingles?

About 100C lower on a nice day.

--
When you are kind to someone in trouble, you hope they'll remember
and be kind to someone else. And it'll become like a wildfire.
-- Whoopi Goldberg