On Tue, 23 Oct 2012 11:03:39 -0700 (PDT), stratfordone
wrote:

I'm looking to put plywood down to create more storage space in my
attic, but can't seem to find a straight answer on ventilation concerns.


There are millions of homes with attic floors and insulation between
them and the ceiling below. Your only concern might be where there is
a recesseced light fixture in the ceiling, and heat needs to escape.
Otherwise this is just a common attic floor and of no concern. I do
agree that 2x6 joists are not real strong, so dont use 3/4" plywood,
use half inch and dont overload it with heavy stuff. Most people just
store xmas decorations and old clothing. That should not be a
problem.