I use the area under my deck for storage. Have a shed and
several motorcycles under there. For years I've tarped the
bikes for winter, but the whole area gets drenched and
retains moisture. It's also a pain to go under the deck to
get something when it's raining with all the water dripping...

I got the bright idea of slinging a large tarp under the
deck. As I tried to implement this, I realized it wasn't so
bright. No matter what I tried I couldn't get all the sags
out. It rained pretty good last night, and this morning I
found most of the tarp on the ground. Sigh....

What I'd like to try now is metal siding, screwed directly
to the bottom of the joists. Starting at the side of the
house the metal would have just a very shallow depression
between the joists, and this would increase gently as I
approach the other side of the deck. At that side, I would
install a gutter to collet the runoff and deposit it well
away from my stuff. What I would end up wtih is a gently
sloped trough between each adjacent pair of joists.

Anyone have any suggestions for sources of cheap siding or
any other source of thin readily worked sheetmetal? Aluminum
preferred as it's easy to work with.
I'm north of Sacramento, so hoping for something within
reasonable driving range, say 120 miles.


Thanks,

Jon