Our second-story deck is underneath some weeping Cherry trees and Birch trees, which drop cherries, pollen, twigs and junk 3/4 of the year it seems. I want to put an awning over the deck (there is already a frame) to keep the junk off the deck and reduce cleaning. My wife thought of aluminum door/window screen, but I know that will become caked with junk and require scrubbing with a brush. I think that standard canvas will become stained with black cherry juice, which has already stained our newly repainted deck after just 1 season.
What kind of material is available in order to:
-be easy to wash debris off with a hose
-not become stained from cherries
-allow some ambient light (ie white?)
Is there some kind of tyvek-like awning material available?