Anybody got anything nominally objective about the relative merits of
interior window shades (especially modren, glare filtering plastic woven
ones) versus real, no-shit honest-to-God awnings?

My local Nat'l Register Arboretum, on the board of which I roost, wants to
reduce glare in our newly-restored 1889 sunporch, which had awnings in the
Olden Days.

My esteemed colleagues on the Board, who tend to be suburban soccer mom
gardeners/Martha Stewart types and the retired Telephone Company Bean
Counters  want the cheesy shades, even after I made the supremely foolish
pitch for awnings on the grounds that they're historic and will reduce
heating loads/cooling costs.

Help me beat off the forces of Evil. Your assistance will be appreciated.

Ralph